Composite structural member, method for manufacturing the same, and vehicle

Abstract

The disclosure relates to a composite structure and a preparation method thereof and a vehicle, the composite structure comprising a magnesium alloy body and an embedded part, the embedded part being embedded in the inside of the magnesium alloy body, and the embedded part having an embedded part covered by the magnesium alloy body and a connecting part exposed to the magnesium alloy body, the magnesium alloy body being connected to an external part through the connecting part; wherein the wall thickness of the magnesium alloy body is greater than the wall thickness of the embedded part. Through the above technical scheme, the composite structure provided by the disclosure can ensure that the overall composite structure has high rigidity and durability, ensure that the overall composite structure has high structural strength and high reliability, and at the same time, when the parts made of magnesium alloy are connected with other parts made of other materials, the possibility of local cracking and corrosion and other problems can be reduced, which is beneficial to improve the connection quality of the parts made of magnesium alloy and other parts made of other materials.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle manufacturing technology, specifically to a composite structural component and its preparation method, and a vehicle. Background Technology

[0002] In related technologies, to meet the overall lightweight design requirements of vehicles, some vehicle components are made of lightweight magnesium alloys. However, due to the low elastic modulus of magnesium alloys, components made of magnesium alloys are prone to low structural stiffness when used. At the same time, when magnesium alloy components are connected with components made of other materials, local cracking and corrosion are likely to occur, which seriously affects the connection quality of magnesium alloy components with other components. This limits the application of magnesium alloy components in vehicles. Therefore, how to improve the overall structural strength and connection quality of components has become a research goal for industry professionals. Summary of the Invention

[0003] The purpose of this disclosure is to provide a composite structural component and its preparation method, as well as a vehicle, so as to ensure that the composite structural component has high rigidity and durability, high structural strength and high reliability. At the same time, it can reduce the possibility of local cracking and corrosion when the magnesium alloy component is connected with the component made of other materials, which is conducive to improving the connection quality of the magnesium alloy component with the component made of other materials.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a composite structural member, comprising: Magnesium alloy body; and An insert is embedded inside the magnesium alloy body, and the insert has an embedding portion covered by the magnesium alloy body and a connecting portion exposed outside the magnesium alloy body. The magnesium alloy body is used to connect to an external component through the connecting portion. The wall thickness of the magnesium alloy body is greater than the wall thickness of the insert.

[0005] Through the above-mentioned technical solution, namely the composite structural component provided in this disclosure, the composite structural component embeds the insert inside the magnesium alloy body, and by constructing the wall thickness of the magnesium alloy body to be greater than the wall thickness of the insert, when the insert is embedded inside the magnesium alloy body, the relatively thick magnesium alloy body can stably and firmly cover the insert, which is beneficial to ensure that the overall composite structural component has high rigidity and durability, and ensures that the overall composite structural component has high structural strength and high reliability. Furthermore, by embedding inserts in the local areas where the components made of magnesium alloy (e.g., the magnesium alloy body) need to be connected with components made of other materials (e.g., external parts), the overall specific strength and specific stiffness of the local areas where the composite structural component is connected with the external parts can be improved. That is, compared with components made of a single magnesium alloy material, the overall performance of the composite structural component of this disclosure is significantly improved, the torsional and bending resistance is more balanced, and the vibration transmission and noise can be significantly reduced. Thus, when the composite structural component is applied to, for example, a vehicle, it is easy to meet the high-performance design requirements of the whole vehicle, while also improving the NVH performance of the whole vehicle.

[0006] Furthermore, by embedding inserts into the localized areas where magnesium alloy components (e.g., the magnesium alloy body) need to connect with components (external parts) made of other materials, the overall composite structure is still largely made of magnesium alloy, while the inserts are located in relatively small connection areas. This facilitates meeting the overall lightweight design requirements of the composite structure. Moreover, by embedding the inserts within the magnesium alloy body and making the wall thickness of the magnesium alloy body greater than that of the inserts, the magnesium alloy body can be stably and securely connected to the external parts through the inserts' connection points. Since the overall thickness of the inserts is thinner than that of the magnesium alloy body, it is also easier to fix the external parts to the inserts using mechanical connection methods, including but not limited to welding, riveting, or bolting. This broadens the applicability and facilitates on-site processes, improving the connection quality between magnesium alloy components (e.g., the magnesium alloy body) and components (external parts) made of other materials, effectively reducing the possibility of localized cracking and corrosion.

[0007] In some possible implementations, the ratio of the wall thickness of the magnesium alloy body to the wall thickness of the insert is not less than 2; and / or, The magnesium alloy body is a thin-walled structural component. This arrangement facilitates meeting the overall lightweight design requirements of the vehicle, while also enabling the mass production application of composite structural components and meeting the requirements for stable mechanical connections between various parts, thereby improving the applicability of composite structural components.

[0008] In some possible implementations, the number of both the embedding portion and the connecting portion is multiple, and the multiple embedding portions and the multiple connecting portions are arranged alternately; and / or, The elastic modulus of the magnesium alloy body is designed to be smaller than that of the insert. This arrangement helps to improve the connection quality between the magnesium alloy body and the external components, resulting in high reliability.

[0009] In some possible implementations, the ratio of the area of ​​the plurality of embedded portions of the insert covered by the magnesium alloy body to the area of ​​the plurality of connecting portions of the insert exposed on the magnesium alloy body is not less than 2; and / or, There is a first distance between the inner edge of the embedding portion covered by the magnesium alloy body and the inner edge of the connecting portion of the embedding exposed on the magnesium alloy body, wherein the ratio of the first distance to the wall thickness of the magnesium alloy body is not less than 1; and / or, The connecting part has an embedded edge covered by the magnesium alloy body and an exposed edge exposed to the magnesium alloy body. The length of the embedded edge is greater than the length of the exposed edge. This arrangement helps to ensure that the composite structure connected as a whole has high rigidity and durability, and ensures that the composite structure has high structural strength and high reliability.

[0010] In some possible implementations, the insert comprises an aluminum alloy stamping or a steel stamping; and / or, The magnesium alloy body and the insert are integrally formed by high-pressure die casting or semi-solid molding. This arrangement ensures that the composite structure has high structural strength and reliability. Furthermore, the integral molding design can simplify the number of parts and reduce manufacturing costs.

[0011] In some possible implementations, the insert is formed with a limiting portion, which is used to cooperate with the magnesium alloy body when the insert is embedded inside the magnesium alloy body to restrict the movement of the magnesium alloy body and the insert. This arrangement can achieve stable and firm embedding of the insert inside the magnesium alloy body, which is beneficial to improving the overall structural strength and reliability of the composite structure.

[0012] In some possible implementations, the limiting portion includes at least one of a limiting hole, a recess, and a protrusion. This arrangement is simple in structure and easy to process and manufacture on-site, ensuring that the insert is stably and firmly embedded inside the magnesium alloy body.

[0013] In some possible implementations, the composite structure further includes a protective layer covering the outer surfaces of the magnesium alloy body and the connecting portion. This arrangement can reduce problems such as chemical corrosion when the composite structure is connected to external components.

[0014] In some possible implementations, the area containing the outer surfaces of the magnesium alloy body and the connecting portion includes a wet area and a dry area; Wherein, the magnesium alloy body and the connecting portion are provided with the protective layer on the outer surface of the dry area, the protective layer including a passivation layer; and / or, The protective layer is provided on the outer surface of the magnesium alloy body and the connecting part located in the wet area. The protective layer includes a passivation layer, or the protective layer includes a passivation layer and an electrophoretic layer, or the protective layer includes a passivation layer and a powder coating layer, or the protective layer includes a passivation layer, an electrophoretic layer and a powder coating layer. Such arrangement can effectively reduce problems such as chemical corrosion when the composite structure is connected to the external parts, and can also reduce the production and manufacturing costs.

[0015] A second aspect of this disclosure provides a method for preparing a composite structural component, comprising: The insert is placed inside the cavity of the mold and the mold is closed; Magnesium alloy is filled into the cavity through the gate of the mold to form a magnesium alloy body covering the insert. The insert has an embedding portion covered by the magnesium alloy body and a connecting portion exposed outside the magnesium alloy body. The magnesium alloy body is connected to an external component through the connecting portion. The wall thickness of the magnesium alloy body is configured to be greater than the wall thickness of the insert. This arrangement allows for a stable and firm covering of the insert through the relatively thick magnesium alloy body, which helps to ensure that the overall composite structure has high rigidity and durability, and ensures that the overall composite structure has high structural strength and high reliability. Furthermore, by embedding inserts in the local areas where the components made of magnesium alloy (e.g., the magnesium alloy body) need to be connected with components made of other materials (e.g., external parts), the overall specific strength and specific stiffness of the local areas where the composite structural component is connected with the external parts can be improved. That is, compared with components made of a single magnesium alloy material, the overall performance of the composite structural component of this disclosure is significantly improved, the torsional and bending resistance is more balanced, and the vibration transmission and noise can be significantly reduced. Thus, when the composite structural component is applied to, for example, a vehicle, it is easy to meet the high-performance design requirements of the whole vehicle, while also improving the NVH performance of the whole vehicle.

[0016] Furthermore, by embedding inserts into the localized areas where magnesium alloy components (e.g., the magnesium alloy body) need to connect with components (external parts) made of other materials, the overall composite structure is still largely made of magnesium alloy, while the inserts are located in relatively small connection areas. This facilitates meeting the overall lightweight design requirements of the composite structure. Moreover, by embedding the inserts within the magnesium alloy body and making the wall thickness of the magnesium alloy body greater than that of the inserts, the magnesium alloy body can be stably and securely connected to the external parts through the inserts' connection points. Since the overall thickness of the inserts is thinner than that of the magnesium alloy body, it is also easier to fix the external parts to the inserts using mechanical connection methods, including but not limited to welding, riveting, or bolting. This broadens the applicability and facilitates on-site processes, improving the connection quality between magnesium alloy components (e.g., the magnesium alloy body) and components (external parts) made of other materials, effectively reducing the possibility of localized cracking and corrosion.

[0017] In some possible implementations, the gate is configured to be located away from the insert; and / or, Liquid or semi-solid magnesium alloy is filled into the cavity through the gate of the mold, so that the magnesium alloy body and the insert are integrally formed by high-pressure die casting or semi-solid molding process; and / or, Before placing the insert in the cavity of the mold and closing the mold, the preparation method further includes: preheating the insert; and / or, The insert includes aluminum alloy stampings or steel stampings. This arrangement ensures that the formed magnesium alloy body can stably and firmly cover the insert, guaranteeing that the composite structure has high structural strength. It is beneficial to improve the connection quality of parts made of magnesium alloy (e.g., magnesium alloy body) with parts (external parts) made of other materials, resulting in high reliability.

[0018] In some possible embodiments, after filling the cavity with magnesium alloy through the mold gate to form a magnesium alloy body covering the insert, the preparation method further includes: The magnesium alloy body and the connecting part are subjected to anti-corrosion treatment to form a protective layer covering the outer surface of the magnesium alloy body and the connecting part, thereby forming the composite structural component. This arrangement can reduce problems such as chemical corrosion when the composite structural component is connected to external parts.

[0019] In some possible implementations, the regions containing the outer surfaces of the magnesium alloy body and the connecting portion include wet and dry areas, and the anti-corrosion treatment of the magnesium alloy body and the connecting portion to form a protective layer covering the outer surfaces of the magnesium alloy body and the connecting portion includes: The outer surfaces of the magnesium alloy body and the connecting portion located in the dry area are passivated to form a passivation layer covering the outer surfaces of the magnesium alloy body and the connecting portion, the protective layer including the passivation layer; and / or, The outer surfaces of the magnesium alloy body and the connecting portion located in the wet area are coated to form a protective layer covering the outer surfaces of the magnesium alloy body and the connecting portion. The protective layer includes a passivation layer, or the protective layer includes a passivation layer and an electrophoretic layer, or the protective layer includes a passivation layer and a powder coating layer, or the protective layer includes a passivation layer, an electrophoretic layer, and a powder coating layer. This arrangement can effectively reduce problems such as chemical corrosion when the composite structure is connected to the external component, while also reducing manufacturing costs.

[0020] In some possible implementations, the ratio of the wall thickness of the magnesium alloy body to the wall thickness of the insert is not less than 2; and / or, The magnesium alloy body is configured as a thin-walled structural component; and / or, The number of the embedding part and the connecting part are both multiple, and the multiple embedding parts and the multiple connecting parts are arranged alternately; and / or, The elastic modulus of the magnesium alloy body is configured to be smaller than that of the insert; and / or, The ratio of the area of ​​the plurality of embedded portions of the insert covered by the magnesium alloy body to the area of ​​the plurality of connecting portions of the insert exposed on the magnesium alloy body is not less than 2; and / or, There is a first distance between the inner edge of the embedding portion covered by the magnesium alloy body and the inner edge of the connecting portion of the embedding exposed on the magnesium alloy body, wherein the ratio of the first distance to the wall thickness of the magnesium alloy body is not less than 1; and / or, The connecting portion has an embedded edge covered by the magnesium alloy body and an exposed edge exposed outside the magnesium alloy body, wherein the length of the embedded edge is greater than the length of the exposed edge; and / or, Before setting the insert in the cavity of the mold and closing the mold, the preparation method further includes: forming a limiting part on the insert. The limiting part is used to cooperate with the magnesium alloy body when the insert is embedded in the interior of the magnesium alloy body to restrict the movement of the magnesium alloy body and the insert. This arrangement helps to ensure that the composite structure as a whole has high rigidity and durability, and ensures that the composite structure as a whole has high structural strength and high reliability.

[0021] A third aspect of this disclosure provides a composite structural component, which is prepared using the preparation method provided in the second aspect above.

[0022] A fourth aspect of this disclosure provides a vehicle that includes the composite structural component provided in the first aspect above, or includes the composite structural component provided in the third aspect above.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a composite structural component provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 Schematic diagram of the cross-section at position AA; Figure 3 This is a schematic diagram of the composite structure provided in an exemplary embodiment of this disclosure from another angle; Figure 4 This is a schematic diagram of an insert of a composite structural component provided in an exemplary embodiment of this disclosure; Figure 5 This is a schematic diagram from another angle of the insert of the composite structural member provided in an exemplary embodiment of this disclosure; Figure 6 This is a flowchart of a method for preparing a composite structural component provided in an exemplary embodiment of this disclosure.

[0025] Explanation of reference numerals in the attached figures 1-Magnesium alloy body; 2-Insertion; 210-Insertion part; 220-Connecting part; 221-Insertion edge; 222-Exposed edge; 230-Limiting part; 231-Limiting hole; 232-Recessed part; 233-Protruding part; 3-Wet area; 4-Dry area. Detailed Implementation

[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0027] In this disclosure, unless otherwise stated, "inner" and "outer" refer to the inner and outer contours relative to the outline of the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0028] According to a first aspect of this disclosure, a composite structural component is provided, such as a composite structural component formed by integrally connecting a thin-walled magnesium alloy part and an insert disposed therein, with reference to... Figures 1 to 5 As shown, the composite structural component includes a magnesium alloy body 1 and an insert 2. The insert 2 is embedded inside the magnesium alloy body 1 and has an embedding portion 210 covered by the magnesium alloy body 1 and a connecting portion 220 exposed outside the magnesium alloy body 1. The magnesium alloy body 1 is connected to an external component through the connecting portion 220. The wall thickness of the magnesium alloy body 1 is greater than the wall thickness of the insert 2.

[0029] Through the above-mentioned technical solution, namely the composite structural component provided in this disclosure, the composite structural component embeds the insert 2 inside the magnesium alloy body 1, and by constructing the wall thickness of the magnesium alloy body 1 to be greater than the wall thickness of the insert 2, when the insert 2 is embedded inside the magnesium alloy body 1, the relatively thick magnesium alloy body 1 can stably and firmly cover the insert 2, which is beneficial to ensure that the composite structural component connected as a whole has high rigidity and durability, and ensures that the composite structural component has high structural strength and high reliability. Furthermore, since this disclosure embeds an insert 2 in the local area where the component made of magnesium alloy (e.g., magnesium alloy body 1) needs to be connected with a component (external part) made of other materials, the overall specific strength and specific stiffness of the local area where the composite structural component is connected with the external part can be improved. That is, compared with the component made of a single magnesium alloy material, the overall performance of the composite structural component of this disclosure is significantly improved, the torsional and bending resistance is more balanced, and the vibration transmission and noise can be significantly reduced. Thus, when the composite structural component is applied to, for example, a vehicle, it is easy to meet the high-performance design requirements of the whole vehicle, while also improving the NVH performance of the whole vehicle.

[0030] Furthermore, since the insert 2 is embedded in the local area where the magnesium alloy component (e.g., magnesium alloy body 1) needs to be connected with components (external parts) made of other materials, the overall structural area of ​​the composite structure is still made of magnesium alloy, while the insert 2 is placed in the relatively small connection area, which also facilitates the overall lightweight design requirements of the composite structure. Moreover, by embedding the insert 2 inside the magnesium alloy body 1 and making the wall thickness of the magnesium alloy body 1 greater than the wall thickness of the insert 2, it is ensured that the magnesium alloy body 1 can be stably and firmly connected to the external parts through the connection portion 220 of the insert 2. At the same time, since the overall thickness of the insert 2 is thinner than the overall thickness of the magnesium alloy body 1, it is also convenient to fix the external parts to the connection portion 220 of the insert 2 using mechanical connection methods such as welding, riveting, or bolting, etc., which has a wide range of applications and facilitates on-site process implementation.

[0031] Furthermore, based on the above configuration, since the insert 2 has an insert portion 210 covered by the magnesium alloy body 1 and a connecting portion 220 exposed on the magnesium alloy body 1, the magnesium alloy body 1 can be connected to an external component (not shown) through the connecting portion 220 of the insert 2. This arrangement allows the magnesium alloy component (e.g., the magnesium alloy body 1) to be stably and firmly connected to the component (external component) of other materials when connected with the component (external component) made of magnesium alloy, effectively reducing the possibility of local cracking and corrosion, and improving the connection quality between the magnesium alloy component (e.g., the magnesium alloy body 1) and the component (external component) made of other materials. Thus, when the magnesium alloy component (e.g., the magnesium alloy body 1) is applied to, for example, a vehicle, it can not only meet the overall lightweight design requirements of the vehicle, but also realize the mass production application of composite structural components and meet the stable mechanical connection requirements between various components, improve the applicability of composite structural components, and have the advantage of low manufacturing cost, thus meeting the high-performance design requirements of the whole vehicle.

[0032] It should be noted that, in some exemplary application scenarios, the composite structural components provided in this disclosure can be applied to at least one of the following applications:, but not limited to, the C-pillar, D-pillar, rear floor, front compartment, shock absorber tower, and rear longitudinal beam of a vehicle. That is, it can be understood that the magnesium alloy body 1 may include, but is not limited to, components made of magnesium alloy such as magnesium alloy body parts, magnesium alloy battery pack housings, magnesium alloy rear floors, magnesium alloy front compartments, and magnesium alloy subframes. This disclosure does not specifically limit such deformation methods, and those skilled in the art can adaptively design the composite structural components according to the actual application scenarios.

[0033] In addition, this disclosure does not specifically limit the embedding position of the insert 2 relative to the magnesium alloy body 1. For example, the embedding position of the insert 2 can be set at the connection position of the magnesium alloy body 1 that needs to be connected to the external component, so as to ensure that the external component is stably mechanically connected to the composite structure, thereby meeting the high performance design requirements and lightweight design requirements of the whole vehicle.

[0034] Furthermore, this disclosure does not specifically limit the specific structure of the aforementioned external components. Those skilled in the art can adaptively design the specific structure of the external components according to the specific structure of the composite structural components that need to be adapted. The purpose is to ensure that the external components are stably mechanically connected to the composite structural components, thereby meeting the high-performance design requirements and lightweight design requirements of the vehicle.

[0035] In some possible implementations, refer to Figures 1 to 5 As shown, the ratio of the wall thickness of the magnesium alloy body 1 to the wall thickness of the insert 2 can be no less than 2. With this arrangement, the thickness of the insert 2 can be controlled to be less than 1 / 2 of the thickness of the magnesium alloy body 1, ensuring that the wall thickness of the magnesium alloy body 1 covers the thickness of the insert 2 by more than 1 / 2. This achieves the purpose of stably and firmly embedding the insert 2 inside the magnesium alloy body 1, which is beneficial to improving the overall structural strength and reliability of the composite structure. In this way, when the composite structure is applied to vehicles, it can not only meet the overall lightweight design requirements of the vehicle, but also realize the mass production application of the composite structure and meet the stable mechanical connection requirements between various components, thus improving the applicability of the composite structure.

[0036] In addition, in some embodiments, the magnesium alloy body 1 can be constructed as a thin-walled structural component, which facilitates meeting the overall lightweight design requirements of the vehicle. By embedding an insert 2 in the connection area of ​​the magnesium alloy body 1 of the thin-walled structural component that needs to be connected with components (external parts) of other materials, it is beneficial to improve the overall structural strength and reliability of the composite structural component. Furthermore, due to the improvement in the overall rigidity and durability of the composite structural component, it is ensured that the components made of magnesium alloy (e.g., the magnesium alloy body 1) have high connection quality and high reliability when connected with components (external parts) of other materials.

[0037] For example, in some embodiments, the wall thickness of the magnesium alloy body 1 can be, for example, 2.5mm-5mm. This arrangement allows the magnesium alloy body 1 to be designed as, for example, a thin-walled structural component, ensuring that the magnesium alloy body 1 has high structural strength while also meeting the overall lightweight design requirements of the vehicle.

[0038] For example, the wall thickness of the magnesium alloy body 1 can be, for example, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm and 5 mm, etc. This disclosure is not limited to this. Those skilled in the art can adapt the wall thickness of the magnesium alloy body 1 according to actual application requirements.

[0039] In addition, in some embodiments, the wall thickness of the insert 2 can be, for example, 1mm-2mm. This arrangement can ensure that the insert 2 has high structural strength, and also allows the relatively thick magnesium alloy body 1 to stably and firmly cover the insert 2 after it is embedded inside the magnesium alloy body 1, resulting in high reliability.

[0040] For example, the wall thickness of the insert 2 can be, for example, 1 mm, 1.5 mm, 2 mm, etc. This disclosure is not limited to this. Those skilled in the art can adaptively design the wall thickness of the insert 2 according to actual application requirements.

[0041] It should be noted that the wall thickness of the magnesium alloy body 1 and the wall thickness of the insert 2 can be understood as, for example, the overall thickness of the corresponding thin-walled structural components of the magnesium alloy body 1 and the insert 2.

[0042] In some possible implementations, the material of the insert 2 can be constructed to be different from that of the magnesium alloy body 1. In this way, the parts made of magnesium alloy (e.g., the magnesium alloy body 1) can be stably and firmly connected to parts (external parts) made of other materials by means of the insert 2 made of a different material from the magnesium alloy body 1. This effectively reduces the possibility of local cracking and corrosion, and helps to improve the connection quality between the parts made of magnesium alloy (e.g., the magnesium alloy body 1) and parts (external parts) made of other materials, thereby meeting the design requirements of overall vehicle lightweighting and high performance.

[0043] For example, in some embodiments, the insert 2 may include, but is not limited to, aluminum alloy stampings or steel stampings, to ensure that the insert 2 has high structural strength, so as to achieve stable mechanical connection of the external component to the composite structure. At the same time, the insert 2 is prepared by stamping process, which also facilitates on-site processing and preparation of the insert 2, resulting in low cost and high efficiency.

[0044] It should be noted that, since the magnesium alloy body 1, made of magnesium alloy, has good electromagnetic shielding and damping properties, and aluminum alloy stampings or steel stampings have advantages such as high structural strength and corrosion resistance, by connecting the magnesium alloy body 1 and the insert 2 into a whole to form a composite structural component, functional integration can be achieved. In this way, when the composite structural component is applied to vehicles, it is easy to meet the high-performance design requirements of the whole vehicle, while also improving the NVH performance of the whole vehicle.

[0045] In some possible implementations, the magnesium alloy body 1 and the insert 2 can be integrally formed by, for example, high-pressure die casting or semi-solid molding. This arrangement ensures that the magnesium alloy body 1 can be stably connected to the insert 2, ensuring that the composite structure has high structural strength and reliability. Furthermore, the integral molding design can simplify the number of parts. Thus, when the composite structure is applied to, for example, a vehicle, it can meet the overall lightweight design requirements of the vehicle, while also enabling the mass production application of the composite structure and meeting the requirements for stable mechanical connection between the various parts.

[0046] It should be noted that, since this disclosure uses die casting or semi-solid forming process to form a complex magnesium alloy body 1 in one step, and uses stamping process to prepare an insert 2 with a relatively flat and simple surface and a relatively large number of stress-reinforcing areas and sealing connection surfaces, it can reduce the overall manufacturing cost of composite structural parts, improve material utilization and yield, and facilitate the mass production application of composite structural parts.

[0047] In some possible implementations, refer to Figures 1 to 5 As shown, in the extension direction of, for example, the insert 2, there can be multiple insert portions 210 and multiple connecting portions 220, and multiple insert portions 210 and multiple connecting portions 220 are arranged alternately. In this arrangement, the magnesium alloy body 1 can be stably and firmly covered by the insert 2, while also ensuring that the outer part and the insert 2 have multiple connection positions. In this way, when the magnesium alloy body 1 is connected to the outer part through the connecting portion 220 of the insert 2, it is beneficial to improve the connection quality of the parts made of magnesium alloy (e.g., the magnesium alloy body 1) and parts made of other materials (outer parts), and the reliability is high.

[0048] In addition, considering that in order to ensure a more balanced torsional and bending resistance of the integrated composite structure and meet the high-performance design requirements of the composite structure, in some embodiments, the elastic modulus of the magnesium alloy body 1 can be configured to be smaller than that of the insert 2. This arrangement facilitates the design of equal stiffness (equal bending stiffness) between the relatively thick magnesium alloy body 1 and the relatively thin insert 2, which can improve the overall specific strength and specific stiffness of the local area where the composite structure is connected to, for example, external components. This ensures a more balanced torsional and bending resistance of the integrated composite structure and achieves the goal of meeting the high-performance design requirements of the composite structure.

[0049] It should be noted that this is based on, for example, the condition of equal stiffness: ,in, This represents the elastic modulus of material 1 (e.g., magnesium alloy body 1). This indicates the thickness (wall thickness) of material 1 (e.g., magnesium alloy body 1). This represents the elastic modulus of material two (e.g., insert 2). The material thickness (wall thickness) of material 2 (e.g., insert 2) is indicated. Thus, by constructing the elastic modulus of the magnesium alloy body 1 to be less than that of the insert 2, and constructing the wall thickness of the magnesium alloy body 1 to be greater than that of the insert 2, this disclosure facilitates the design of equal stiffness (equal bending stiffness) between the relatively thick magnesium alloy body 1 and the relatively thin insert 2. This can improve the overall specific strength and specific stiffness of the local area where the composite structural component is connected to, for example, an external component, thereby achieving the goal of meeting the high-performance design requirements of the composite structural component. At the same time, it can also improve the connection quality between the parts made of magnesium alloy (e.g., magnesium alloy body 1) and parts (external components) made of other materials.

[0050] In some possible implementations, refer to Figures 1 to 5 As shown, in the thickness direction of, for example, the ratio of the area of ​​the multiple embedded portions 210 of the embedded portion 2 covered by the magnesium alloy body 1 to the area of ​​the multiple connecting portions 220 of the embedded portion 2 exposed to the magnesium alloy body 1 can be no less than 2. Thus, by constructing the total area of ​​the embedded portion 2 covered by the magnesium alloy body 1 to be greater than the total area of ​​the embedded portion 2 exposed to the magnesium alloy body 1, it is possible to achieve a stable and firm covering of the embedded portion 2 by means of the relatively thick magnesium alloy body 1, ensuring that the composite structure has high structural strength as a whole, and also helping to improve the connection quality of the parts made of magnesium alloy (e.g., the magnesium alloy body 1) with parts (external parts) made of other materials.

[0051] Additionally, in some implementations, references Figure 1 and Figure 4 As shown, the inner edge of the insert 210 covered by the magnesium alloy body 1 and the inner edge of the connecting part 220 exposed by the insert 2 can have a first distance L1. The ratio of the first distance L1 to the wall thickness of the magnesium alloy body 1 is not less than 1. This arrangement helps to ensure that the composite structure is connected as a whole has high rigidity and durability, and ensures that the composite structure has high structural strength and high reliability.

[0052] Furthermore, in some implementations, references Figure 1 and Figure 4 As shown, the connecting part 220 may have an embedded edge 221 covered by the magnesium alloy body 1 and an exposed edge 222 exposed outside the magnesium alloy body 1. The length of the embedded edge 221 is greater than the length of the exposed edge 222. This arrangement ensures that there is a large bonding force between the magnesium alloy body 1 and the embedded part 2, and ensures that the composite structure connected as a whole has high rigidity and durability, thereby improving the overall structural strength and reliability of the composite structure.

[0053] In some possible implementations, refer to Figures 1 to 5 As shown, a limiting part 230 can be formed on the insert 2. The limiting part 230 is used to cooperate with the magnesium alloy body 1 when the insert 2 is embedded inside the magnesium alloy body 1 to restrict the movement of the magnesium alloy body 1 and the insert 2. In this way, by setting the limiting part 230, the insert 2 can be stably and firmly embedded inside the magnesium alloy body 1, which is beneficial to improving the overall structural strength and reliability of the composite structure.

[0054] The limiting part 230 can be designed in any suitable manner. For example, in some embodiments, the limiting part 230 may include at least one of the limiting hole 231, the recess 232 and the protrusion 233. This disclosure does not specifically limit such variations. Those skilled in the art can adapt the specific structure of the limiting part 230 according to actual application needs.

[0055] For example, Figure 1 and Figure 2 The example shows that the insert 2 can be provided with a plurality of protrusions 233 at intervals, and at least one limiting hole 231 can be provided between two adjacent protrusions 233. With this configuration, after liquid or semi-solid magnesium alloy is filled into the cavity from the gate (not shown) of the mold (not shown), the liquid or semi-solid magnesium alloy can flow to the area between two adjacent protrusions 233 and fill the limiting hole 231. In this way, after the liquid or semi-solid magnesium alloy solidifies, a "pin" structure that cooperates with the limiting hole 231 can be formed, which can restrict the movement of the magnesium alloy body 1 and the insert 2, and ensure that the insert 2 is stably and firmly embedded in the interior of the magnesium alloy body 1.

[0056] in addition, Figure 1 and Figure 2 The location of the protrusion 233 is shown as an example, which can be formed as a connecting part 220, so as to enable the magnesium alloy body 1 to be connected to an external component via the connecting part 220 of the insert 2.

[0057] It is understood that this disclosure does not specifically limit the specific structural dimensions and external contours of the limiting part 230 (e.g., at least one of the limiting hole 231, recess 232, and protrusion 233). Those skilled in the art can design it adaptively according to actual application needs. The purpose is to enable the limiting part 230 to cooperate with the magnesium alloy body 1 when the insert 2 is embedded inside the magnesium alloy body 1, so as to restrict the movement of the magnesium alloy body 1 and the insert 2.

[0058] Additionally, in some possible implementations, refer to Figures 1 to 5As shown, the composite structural component may also include a protective layer (not shown), which covers the outer surfaces of the magnesium alloy body 1 and the connecting portion 220. Thus, the protective layer can protect the composite structural component and reduce problems such as chemical corrosion when the composite structural component is connected to external parts. For example, when the composite structural component is applied to a vehicle, the protective layer can reduce the risk of chemical corrosion of the magnesium alloy body 1 during the pretreatment process such as painting in the vehicle manufacturing process, which can help meet the design requirements of overall vehicle lightweighting and high performance.

[0059] It should be noted that those skilled in the art can adapt the specific structure of the protective layer according to the actual application requirements. For example, the protective layer may include a passivation layer (described in detail below), an electrophoretic layer (described in detail below), and a powder coating layer (described in detail below). Alternatively, the protective layer may include a passivation layer, or alternatively, the protective layer may include a passivation layer and an electrophoretic layer, or alternatively, the protective layer may include a passivation layer and a powder coating layer. This disclosure does not specifically limit such variations. The purpose is to enable the protective layer to protect the composite structure and reduce problems such as chemical corrosion when the composite structure is connected to external components, so as to facilitate subsequent processes.

[0060] Exemplarily, in some implementations, reference is made to Figure 1 As shown, the area where the outer surfaces of the magnesium alloy body 1 and the connecting part 220 are located may include a wet area 3 and a dry area 4. A protective layer may be provided on the outer surface of the magnesium alloy body 1 and the connecting part 220 in the dry area 4. The protective layer includes a passivation layer. That is, by, for example, passivating the outer surfaces of the magnesium alloy body 1 and the connecting part 220 in the dry area 4, a passivation layer covering the outer surfaces of the magnesium alloy body 1 and the connecting part 220 can be formed, thereby reducing the risk of chemical corrosion of the magnesium alloy body 1.

[0061] In addition, a protective layer may be provided on the outer surface of the magnesium alloy body 1 and the connecting part 220 located in the wet area 3. The protective layer may include a passivation layer. That is, by, for example, passivating the outer surface of the magnesium alloy body 1 and the connecting part 220 located in the wet area 3, a passivation layer covering the outer surface of the magnesium alloy body 1 and the connecting part 220 can be formed, thereby reducing the risk of chemical corrosion of the magnesium alloy body 1.

[0062] Considering that the magnesium alloy body 1 and the connecting portion 220 are more prone to corrosion on the outer surface of the wet zone 3 than on the outer surface of the dry zone 4, therefore, in some alternative embodiments, reference is made to... Figure 1As shown, the protective layer may also include a passivation layer and an electrophoretic layer. That is, by, for example, passivating and electrophoretically treating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3, a coating (including, for example, a passivation layer and an electrophoretic layer) covering the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 can be formed. This can reduce the risk of chemical corrosion of the magnesium alloy body 1. Furthermore, by treating only the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3 with a coating (including, for example, passivation and electrophoresis), the manufacturing cost can also be reduced.

[0063] It is understood that, in some alternative embodiments, the protective layer may also include a passivation layer and a powder coating layer. That is, by, for example, passivating and powder coating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3, a coating (including a passivation layer and a powder coating layer) covering the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 can be formed, thereby reducing the risk of chemical corrosion of the magnesium alloy body 1 and reducing manufacturing costs.

[0064] Alternatively, in some alternative embodiments, the protective layer may also include a passivation layer, an electrophoretic layer, and a powder coating layer. That is, by, for example, passivating, electrophoretically coating, and powder coating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3, a coating (including, for example, a passivation layer, an electrophoretic layer, and a powder coating layer) can be formed on the outer surfaces of the magnesium alloy body 1 and the connecting portion 220, thereby reducing the risk of chemical corrosion of the magnesium alloy body 1 and reducing manufacturing costs.

[0065] It should be noted that when the protective layer includes the passivation layer, electrophoresis layer, and powder coating layer mentioned above, for example, the outer surfaces of the magnesium alloy body 1 and the connecting part 220 located in the wet area 3 and dry area 4 can be passivated first. After forming the passivation layer covering the outer surfaces of the magnesium alloy body 1 and the connecting part 220, electrophoresis and / or powder coating treatments can be performed on the outer surfaces of the magnesium alloy body 1 and the connecting part 220 located in the wet area 3 to form a coating (e.g., electrophoresis layer and / or powder coating layer) covering the outer surfaces of the magnesium alloy body 1 and the connecting part 220. In other words, when the protective layer includes the passivation layer, electrophoresis layer, and powder coating layer mentioned above, the passivation layer, electrophoresis layer, and powder coating layer are stacked.

[0066] Additionally, refer to Figure 1As shown, this disclosure exemplifies the placement of wet area 3 and dry area 4 by using a magnesium alloy body 1 constructed as an example, such as a magnesium alloy body component (magnesium alloy body structural component CD pillar). For example, under vehicle operating conditions, the outer surface area of ​​the magnesium alloy body component and insert 2 that comes into contact with the external environment, for example, in rainy or snowy weather, is wet area 3. For example, the area where the wheel arch portion of the magnesium alloy body component is located can be wet area 3. The outer surface area of ​​the magnesium alloy body component and insert 2 that does not come into contact with the external environment, for example, in rainy or snowy weather, is dry area 4. For example, the area where the remaining part of the magnesium alloy body component is located can be dry area 4. This disclosure is not limited thereto.

[0067] It should be noted that the composite structural component provided in the first aspect of this disclosure can be prepared by, but is not limited to, the method for preparing the composite structural component provided in the second aspect below.

[0068] According to a second aspect of this disclosure, a method for manufacturing a composite structural component is provided, for example, a method for manufacturing a composite structural component formed by integrally connecting a thin-walled magnesium alloy part and an insert disposed therein, with reference to... Figures 1 to 6 As shown, the method for preparing the composite structure includes steps S100 and S200.

[0069] In step S100, the insert 2 is placed inside the cavity of the mold and the mold is closed.

[0070] In step S200, magnesium alloy is filled into the cavity from the gate of the mold to form a magnesium alloy body 1 covering the insert 2. The insert 2 has an insert portion 210 covered by the magnesium alloy body 1 and a connecting portion 220 exposed outside the magnesium alloy body 1. The magnesium alloy body 1 is connected to an external component through the connecting portion 220, and the wall thickness of the magnesium alloy body 1 is configured to be greater than the wall thickness of the insert 2.

[0071] Through the above-mentioned technical solution, namely the method for preparing composite structural components provided in this disclosure, the method fills the cavity with magnesium alloy from the gate (not shown) of the mold (not shown) to form a magnesium alloy body 1 covering the insert 2, thereby enabling the insert 2 to be embedded inside the magnesium alloy body 1. Furthermore, by configuring the wall thickness of the magnesium alloy body 1 to be greater than the wall thickness of the insert 2, when the insert 2 is embedded inside the magnesium alloy body 1, the relatively thick magnesium alloy body 1 can achieve a stable and firm covering of the insert 2. This is beneficial to ensure that the composite structural component connected as a whole has high rigidity and durability, and ensures that the composite structural component as a whole has high structural strength and high reliability. Furthermore, since this disclosure embeds an insert 2 in the local area where the component made of magnesium alloy (e.g., magnesium alloy body 1) needs to be connected with a component (external part) made of other materials, the overall specific strength and specific stiffness of the local area where the composite structural component is connected with the external part can be improved. That is, compared with the component made of a single magnesium alloy material, the overall performance of the composite structural component of this disclosure is significantly improved, the torsional and bending resistance is more balanced, and the vibration transmission and noise can be significantly reduced. Thus, when the composite structural component is applied to, for example, a vehicle, it is easy to meet the high-performance design requirements of the whole vehicle, while also improving the NVH performance of the whole vehicle.

[0072] Furthermore, since the insert 2 is embedded in the local area where the magnesium alloy component (e.g., magnesium alloy body 1) needs to be connected with components (external parts) made of other materials, the overall structural area of ​​the composite structure is still made of magnesium alloy, while the insert 2 is placed in the relatively small connection area, which also facilitates the overall lightweight design requirements of the composite structure. Moreover, by embedding the insert 2 inside the magnesium alloy body 1 and making the wall thickness of the magnesium alloy body 1 greater than the wall thickness of the insert 2, it is ensured that the magnesium alloy body 1 can be stably and firmly connected to the external parts through the connection portion 220 of the insert 2. At the same time, since the overall thickness of the insert 2 is thinner than the overall thickness of the magnesium alloy body 1, it is also convenient to fix the external parts to the connection portion 220 of the insert 2 using mechanical connection methods such as welding, riveting, or bolting, etc., which has a wide range of applications and facilitates on-site process implementation.

[0073] Furthermore, based on the above configuration, since the insert 2 has an insert portion 210 covered by the magnesium alloy body 1 and a connecting portion 220 exposed on the magnesium alloy body 1, the magnesium alloy body 1 can be connected to an external component (not shown) through the connecting portion 220 of the insert 2. This arrangement allows the magnesium alloy component (e.g., the magnesium alloy body 1) to be stably and firmly connected to the component (external component) of other materials when connected with the component (external component) made of magnesium alloy, effectively reducing the possibility of local cracking and corrosion, and improving the connection quality between the magnesium alloy component (e.g., the magnesium alloy body 1) and the component (external component) made of other materials. Thus, when the magnesium alloy component (e.g., the magnesium alloy body 1) is applied to, for example, a vehicle, it can not only meet the overall lightweight design requirements of the vehicle, but also realize the mass production application of composite structural components and meet the stable mechanical connection requirements between various components, improve the applicability of composite structural components, and have the advantage of low manufacturing cost, thus meeting the high-performance design requirements of the whole vehicle.

[0074] It should be noted that, in some exemplary application scenarios, the composite structural components provided in this disclosure can be applied to at least one of the following applications:, but not limited to, the C-pillar, D-pillar, rear floor, front compartment, shock absorber tower, and rear longitudinal beam of a vehicle. That is, it can be understood that the magnesium alloy body 1 may include, but is not limited to, components made of magnesium alloy such as magnesium alloy body parts, magnesium alloy battery pack housings, magnesium alloy rear floors, magnesium alloy front compartments, and magnesium alloy subframes. This disclosure does not specifically limit such deformation methods, and those skilled in the art can adaptively design the composite structural components according to the actual application scenarios.

[0075] In addition, this disclosure does not specifically limit the embedding position of the insert 2 relative to the magnesium alloy body 1. For example, the embedding position of the insert 2 can be set at the connection position of the magnesium alloy body 1 that needs to be connected to the external component, so as to ensure that the external component is stably mechanically connected to the composite structure, thereby meeting the high performance design requirements and lightweight design requirements of the whole vehicle.

[0076] Furthermore, this disclosure does not specifically limit the specific structure of the aforementioned external components. Those skilled in the art can adaptively design the specific structure of the external components according to the specific structure of the composite structural components that need to be adapted. The purpose is to ensure that the external components are stably mechanically connected to the composite structural components, thereby meeting the high-performance design requirements and lightweight design requirements of the vehicle.

[0077] In some possible implementations, the gate can be positioned away from the insert 2. This arrangement ensures that, for example, liquid or semi-solid magnesium alloy can be injected from the mold gate to facilitate the molding of the magnesium alloy body 1 and to ensure that the magnesium alloy body 1 can stably and firmly cover the insert 2.

[0078] in, Figure 1 The direction of the dashed arrow in the middle exemplifies the direction in which, for example, liquid or semi-solid magnesium alloy flows toward the insert 2 after being injected from the mold gate.

[0079] In some possible implementations, liquid or semi-solid magnesium alloy is filled into the cavity through the mold gate, allowing the magnesium alloy body 1 and the insert 2 to be integrally formed by high-pressure die casting or semi-solid molding. This configuration ensures that the magnesium alloy body 1 can be stably connected to the insert 2, ensuring that the composite structure has high structural strength and reliability. Furthermore, the integral molding design can simplify the number of parts. Thus, when the composite structure is applied to, for example, vehicles, it can meet the overall lightweight design requirements of the vehicle, while also enabling mass production of the composite structure and meeting the requirements for stable mechanical connections between the various parts.

[0080] It should be noted that, in order to facilitate processes such as high-pressure die casting or semi-solid molding, placing the insert 2 inside the mold cavity and closing the mold may include the following steps, as detailed below.

[0081] First, you can spray a release agent after the mold is opened.

[0082] Then, for example, a robotic arm is used to grasp the insert 2 and place it in the cavity of the mold. In order to ensure that the insert 2 is stably placed in the cavity of the mold, the insert 2 can be stably fixed in the cavity of the mold by means of, but not limited to, magnetic attraction or peripheral clamping and insert pressing.

[0083] After the corresponding insert 2 is fixed in place, the mold is closed.

[0084] The liquid or semi-solid magnesium alloy is then filled into the cavity through the mold gate, and the magnesium alloy body 1 and the insert 2 are integrally formed by, for example, high-pressure die casting or semi-solid molding process.

[0085] This disclosure does not elaborate on the specific process of the high-pressure die casting process or semi-solid forming process mentioned above. Those skilled in the art can design it adaptively according to actual application needs. The purpose is to achieve the integral forming and processing of the magnesium alloy body 1 and the insert 2.

[0086] In addition, in some possible embodiments, before placing the insert 2 in the cavity of the mold and closing the mold, the preparation method may also include: preheating the insert 2. In this way, under processes such as high-pressure die casting or semi-solid molding, the temperature difference between the insert 2 and the magnesium alloy filled into the cavity can be reduced, ensuring that the magnesium alloy body 1 after molding can stably and firmly cover the insert 2, ensuring that the composite structure has high structural strength, which is beneficial to improving the connection quality of the parts made of magnesium alloy (e.g., magnesium alloy body 1) with parts (external parts) made of other materials, and has high reliability.

[0087] It should be noted that when preheating the insert 2, the temperature of the insert 2 can be heated to, for example, but not limited to, 50℃-200℃. This disclosure does not make a specific limitation. Those skilled in the art can design it adaptively according to actual application needs. The purpose is to reduce the temperature difference between the insert 2 and the magnesium alloy filled into the cavity, so as to ensure that the magnesium alloy body 1 after molding can stably and firmly cover the insert 2.

[0088] In some possible embodiments, after filling the cavity with magnesium alloy from the mold gate to form a magnesium alloy body 1 covering the insert 2, the preparation method may further include: performing anti-corrosion treatment on the magnesium alloy body 1 and the connecting portion 220 to form a protective layer covering the outer surface of the magnesium alloy body 1 and the connecting portion 220 to form a composite structural component. In this way, the protective layer can protect the composite structural component (e.g., the connecting portion 220 of the magnesium alloy body 1 and the insert 2), reducing problems such as chemical corrosion when the composite structural component is connected to external parts. For example, when the composite structural component is applied to a vehicle, the protective layer can reduce the risk of chemical corrosion of the magnesium alloy body 1 during the pretreatment process of vehicle manufacturing, such as painting, thus facilitating the meeting of the overall lightweight and high-performance design requirements of the vehicle.

[0089] It should be noted that those skilled in the art can adapt the specific structure of the protective layer according to the actual application requirements. For example, the protective layer may include a passivation layer (described in detail below), an electrophoretic layer (described in detail below), and a powder coating layer (described in detail below). Alternatively, the protective layer may include a passivation layer, or alternatively, the protective layer may include a passivation layer and an electrophoretic layer, or alternatively, the protective layer may include a passivation layer and a powder coating layer. This disclosure does not specifically limit such variations. The purpose is to enable the protective layer to protect the composite structure and reduce problems such as chemical corrosion when the composite structure is connected to external components, so as to facilitate subsequent processes.

[0090] Exemplarily, in some implementations, reference is made to Figure 1As shown, the area where the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 are located may include a wet area 3 and a dry area 4. Anti-corrosion treatment is performed on the magnesium alloy body 1 and the connecting portion 220 to form a protective layer covering their outer surfaces. This includes passivating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the dry area 4 to form a passivation layer covering their outer surfaces. The protective layer includes the passivation layer; that is, by, for example, passivating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the dry area 4 to form a passivation layer covering their outer surfaces, the risk of chemical corrosion of the magnesium alloy body 1 can be reduced.

[0091] In addition, a coating treatment can be applied to the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3 to form a protective layer covering the outer surfaces of the magnesium alloy body 1 and the connecting portion 220. The protective layer may include a passivation layer. That is, by, for example, passivating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3 to form a passivation layer covering the outer surfaces of the magnesium alloy body 1 and the connecting portion 220, the risk of chemical corrosion of the magnesium alloy body 1 can be reduced.

[0092] Considering that the magnesium alloy body 1 and the connecting portion 220 are more prone to corrosion on the outer surface of the wet zone 3 than on the outer surface of the dry zone 4, therefore, in some alternative embodiments, reference is made to... Figure 1 As shown, the protective layer may also include a passivation layer and an electrophoretic layer. That is, by, for example, passivating and electrophoretically treating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3, a coating (including, for example, a passivation layer and an electrophoretic layer) covering the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 can be formed. This can reduce the risk of chemical corrosion of the magnesium alloy body 1. Furthermore, by treating only the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3 with a coating (including, for example, passivation and electrophoresis), the manufacturing cost can also be reduced.

[0093] It is understood that, in some alternative embodiments, the protective layer may also include a passivation layer and a powder coating layer. That is, by, for example, passivating and powder coating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3, a coating (including a passivation layer and a powder coating layer) covering the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 can be formed, thereby reducing the risk of chemical corrosion of the magnesium alloy body 1 and reducing manufacturing costs.

[0094] Alternatively, in some alternative embodiments, the protective layer may also include a passivation layer, an electrophoretic layer, and a powder coating layer. That is, by, for example, passivating, electrophoretically coating, and powder coating the outer surfaces of the magnesium alloy body 1 and the connecting portion 220 located in the wet area 3, a coating (including, for example, a passivation layer, an electrophoretic layer, and a powder coating layer) can be formed on the outer surfaces of the magnesium alloy body 1 and the connecting portion 220, thereby reducing the risk of chemical corrosion of the magnesium alloy body 1 and reducing manufacturing costs.

[0095] It should be noted that when the protective layer includes the passivation layer, electrophoresis layer, and powder coating layer mentioned above, for example, the outer surfaces of the magnesium alloy body 1 and the connecting part 220 located in the wet area 3 and dry area 4 can be passivated first. After forming the passivation layer covering the outer surfaces of the magnesium alloy body 1 and the connecting part 220, electrophoresis and / or powder coating treatments can be performed on the outer surfaces of the magnesium alloy body 1 and the connecting part 220 located in the wet area 3 to form a coating (e.g., electrophoresis layer and / or powder coating layer) covering the outer surfaces of the magnesium alloy body 1 and the connecting part 220. In other words, when the protective layer includes the passivation layer, electrophoresis layer, and powder coating layer mentioned above, the passivation layer, electrophoresis layer, and powder coating layer are stacked.

[0096] Additionally, refer to Figure 1 As shown, this disclosure exemplifies the placement of wet area 3 and dry area 4 by using a magnesium alloy body 1 constructed as an example, such as a magnesium alloy body component (magnesium alloy body structural component CD pillar). For example, under vehicle operating conditions, the outer surface area of ​​the magnesium alloy body component and insert 2 that comes into contact with the external environment, for example, in rainy or snowy weather, is wet area 3. For example, the area where the wheel arch portion of the magnesium alloy body component is located can be wet area 3. The outer surface area of ​​the magnesium alloy body component and insert 2 that does not come into contact with the external environment, for example, in rainy or snowy weather, is dry area 4. For example, the area where the remaining part of the magnesium alloy body component is located can be dry area 4. This disclosure is not limited thereto.

[0097] In some possible implementations, refer to Figures 1 to 5 As shown, the ratio of the wall thickness of the magnesium alloy body 1 to the wall thickness of the insert 2 can be no less than 2. With this arrangement, the thickness of the insert 2 can be controlled to be less than 1 / 2 of the thickness of the magnesium alloy body 1, ensuring that the wall thickness of the magnesium alloy body 1 covers the thickness of the insert 2 by more than 1 / 2. This achieves the purpose of stably and firmly embedding the insert 2 inside the magnesium alloy body 1, which is beneficial to improving the overall structural strength and reliability of the composite structure. In this way, when the composite structure is applied to vehicles, it can not only meet the overall lightweight design requirements of the vehicle, but also realize the mass production application of the composite structure and meet the stable mechanical connection requirements between various components, thus improving the applicability of the composite structure.

[0098] In addition, in some embodiments, the magnesium alloy body 1 can be configured as a thin-walled structural component, which facilitates meeting the overall lightweight design requirements of the vehicle. By embedding an insert 2 in the connection area of ​​the magnesium alloy body 1 of the thin-walled structural component that needs to be connected with components (external parts) of other materials, it is beneficial to improve the overall structural strength and reliability of the composite structural component. Furthermore, due to the improvement in the overall rigidity and durability of the composite structural component, it is ensured that the components made of magnesium alloy (e.g., the magnesium alloy body 1) have high connection quality and high reliability when connected with components (external parts) of other materials.

[0099] For example, in some embodiments, the wall thickness of the magnesium alloy body 1 can be, for example, 2.5mm-5mm. This arrangement allows the magnesium alloy body 1 to be designed as, for example, a thin-walled structural component, ensuring that the magnesium alloy body 1 has high structural strength while also meeting the overall lightweight design requirements of the vehicle.

[0100] For example, the wall thickness of the magnesium alloy body 1 can be, for example, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm and 5 mm, etc. This disclosure is not limited to this. Those skilled in the art can adapt the wall thickness of the magnesium alloy body 1 according to actual application requirements.

[0101] In addition, in some embodiments, the wall thickness of the insert 2 can be, for example, 1mm-2mm. This arrangement can ensure that the insert 2 has high structural strength, and also allows the relatively thick magnesium alloy body 1 to stably and firmly cover the insert 2 after it is embedded inside the magnesium alloy body 1, resulting in high reliability.

[0102] For example, the wall thickness of the insert 2 can be, for example, 1 mm, 1.5 mm, 2 mm, etc. This disclosure is not limited to this. Those skilled in the art can adaptively design the wall thickness of the insert 2 according to actual application requirements.

[0103] It should be noted that the wall thickness of the magnesium alloy body 1 and the wall thickness of the insert 2 can be understood as, for example, the overall thickness of the corresponding thin-walled structural components of the magnesium alloy body 1 and the insert 2.

[0104] In some possible implementations, the material of the insert 2 can be constructed to be different from that of the magnesium alloy body 1. In this way, the parts made of magnesium alloy (e.g., the magnesium alloy body 1) can be stably and firmly connected to parts (external parts) made of other materials by means of the insert 2 made of a different material from the magnesium alloy body 1. This effectively reduces the possibility of local cracking and corrosion, and helps to improve the connection quality between the parts made of magnesium alloy (e.g., the magnesium alloy body 1) and parts (external parts) made of other materials, thereby meeting the design requirements of overall vehicle lightweighting and high performance.

[0105] For example, in some embodiments, the insert 2 may include, but is not limited to, aluminum alloy stampings or steel stampings, to ensure that the insert 2 has high structural strength, so as to achieve stable mechanical connection of the external component to the composite structure. At the same time, the insert 2 is prepared by stamping process, which also facilitates on-site processing and preparation of the insert 2, resulting in low cost and high efficiency.

[0106] It should be noted that, since the magnesium alloy body 1, made of magnesium alloy, has good electromagnetic shielding and damping properties, and aluminum alloy stampings or steel stampings have advantages such as high structural strength and corrosion resistance, by connecting the magnesium alloy body 1 and the insert 2 into a whole to form a composite structural component, functional integration can be achieved. In this way, when the composite structural component is applied to vehicles, it is easy to meet the high-performance design requirements of the whole vehicle, while also improving the NVH performance of the whole vehicle.

[0107] It should be noted that, since this disclosure uses die casting or semi-solid forming process to form a complex magnesium alloy body 1 in one step, and uses stamping process to prepare an insert 2 with a relatively flat and simple surface and a relatively large number of stress-reinforcing areas and sealing connection surfaces, it can reduce the overall manufacturing cost of composite structural parts, improve material utilization and yield, and facilitate the mass production application of composite structural parts.

[0108] In addition, when connecting components made of magnesium alloy (e.g., magnesium alloy body 1) with components (external parts) made of other materials, the manufacturing method may also include: adapting the connection form of components made of magnesium alloy (e.g., magnesium alloy body 1) with components (external parts) made of other materials according to the specific materials of the insert 2 and the external parts. In this way, it can ensure that the external parts are stably mechanically connected to the composite structure, while also effectively reducing the possibility of local cracking and corrosion in the composite structure. It has the advantages of high reliability and low manufacturing cost.

[0109] For example, in some embodiments, when the material of the insert 2 includes steel, if the material of the outer component connected to the integral magnesium alloy body 1 is also steel, the insert 2 and the outer component can be connected by, for example, steel spot welding, which has the advantages of high reliability and low manufacturing cost.

[0110] In addition, when the material of the insert 2 is steel, if the material of the outer part connected to the integral magnesium alloy body 1 is aluminum alloy, the insert 2 and the outer part can be connected by, for example, SPR self-piercing riveting, which has the advantages of high reliability and low manufacturing cost.

[0111] Furthermore, when the material of the insert 2 is aluminum alloy, if the material of the outer part connected to the integral magnesium alloy body 1 is steel, the insert 2 and the outer part can be connected by, for example, SPR self-piercing riveting, which has the advantages of high reliability and low manufacturing cost.

[0112] In addition, when the material of the insert 2 is aluminum alloy, if the material of the external component connected to the integral magnesium alloy body 1 is aluminum alloy, the insert 2 and the external component can be connected by, for example, SPR self-piercing riveting or aluminum spot welding, which has the advantages of high reliability and low manufacturing cost.

[0113] It should be noted that in special cases, such as when a component made of magnesium alloy (e.g., magnesium alloy body 1) cannot be connected to components (external parts) of other materials by means of an insert 2 due to limitations such as process and its own structure, connection technologies such as FSPR or FEW can be used to ensure that connection problems such as cracking or corrosion do not occur when external parts made of aluminum alloy or steel are connected to magnesium alloy.

[0114] In addition, in some embodiments, the preparation method may also include: adapting the specific anti-corrosion process of the composite structure to the specific material of the insert 2, so as to reduce the risk of chemical corrosion of the magnesium alloy body 1.

[0115] For example, this disclosure is exemplarily described by constructing a magnesium alloy body 1 as a magnesium alloy body component (magnesium alloy body structural component CD pillar). For example, under vehicle operating conditions, the magnesium alloy body component (magnesium alloy body structural component CD pillar) has a wet area 3 and a dry area 4. That is, in rainy or snowy weather, the outer surface area of ​​the magnesium alloy body component and the insert 2 that is in contact with the external environment (wet area 3) is in a wet operating condition, and the outer surface area of ​​the magnesium alloy body component and the insert 2 that is not in contact with the external environment (dry area 4) is in a dry operating condition.

[0116] Based on this, firstly, for dry area 4, regardless of whether the material of the insert 2 is steel or aluminum alloy, the connection part 220 between the magnesium alloy body part and the insert 2 located on the outer surface of dry area 4 can be passivated only, and after passivation, magnesium alloy corrosion will not occur during the pretreatment process such as painting in the whole vehicle preparation.

[0117] In addition, for wet area 3, when the material of insert 2 includes aluminum alloy, after the one-piece magnesium alloy body part and insert 2 are composite molded, the outer surface of the connection part 220 of magnesium alloy body part and insert 2 located in wet area 3 can be passivated first, and then electrophoresis or powder coating can be performed. Then, after connecting with, for example, the body, a pretreatment process for painting can be carried out to ensure that there is no problem of magnesium alloy corrosion and has the advantage of low manufacturing cost.

[0118] Furthermore, for wet area 3, when the material of the insert 2 includes steel, after the one-piece magnesium alloy body part and the insert 2 are composite molded, the outer surface of the connection part 220 of the magnesium alloy body part and the insert 2 located in wet area 3 can be passivated first, and then powder coating is performed to ensure that the contact position between the steel insert 2 and the magnesium alloy body part is completely covered by the powder coating layer. Then, after connecting with, for example, the body, a pre-treatment process for painting is performed to ensure that there is no problem of magnesium alloy corrosion and has the advantage of low manufacturing cost.

[0119] Furthermore, in the pretreatment process before painting, the contact area between the insert 2 and the magnesium alloy body parts can be completely isolated by, for example, by applying PVC, to ensure that the subsequent processes will not cause magnesium alloy corrosion.

[0120] It should be noted that, since the outer surfaces of the connection portion 220 between the magnesium alloy body parts and the insert 2 located in both the dry area 4 and the wet area 3 need to be passivated, the outer surfaces of the connection portion 220 between the magnesium alloy body parts and the insert 2 located in both the dry area 4 and the wet area 3 can be passivated simultaneously, thereby reducing manufacturing costs and simplifying process steps.

[0121] In some possible implementations, refer to Figures 1 to 5 As shown, in the extension direction of, for example, the insert 2, there can be multiple insert portions 210 and multiple connecting portions 220, and multiple insert portions 210 and multiple connecting portions 220 are arranged alternately. In this arrangement, the magnesium alloy body 1 can be stably and firmly covered by the insert 2, while also ensuring that the outer part and the insert 2 have multiple connection positions. In this way, when the magnesium alloy body 1 is connected to the outer part through the connecting portion 220 of the insert 2, it is beneficial to improve the connection quality of the parts made of magnesium alloy (e.g., the magnesium alloy body 1) and parts made of other materials (outer parts), and the reliability is high.

[0122] In addition, considering that in order to ensure a more balanced torsional and bending resistance of the integrated composite structure and meet the high-performance design requirements of the composite structure, in some embodiments, the elastic modulus of the magnesium alloy body 1 can be configured to be less than that of the insert 2. This arrangement facilitates the equal stiffness (equal bending stiffness) design of the relatively thick magnesium alloy body 1 and the relatively thin insert 2, which can improve the overall specific strength and specific stiffness of the local area where the composite structure is connected to, for example, external components, thus ensuring a more balanced torsional and bending resistance of the integrated composite structure and achieving the goal of meeting the high-performance design requirements of the composite structure.

[0123] In some possible implementations, refer to Figures 1 to 5 As shown, in the thickness direction of, for example, the ratio of the area of ​​the multiple embedded portions 210 of the embedded portion 2 covered by the magnesium alloy body 1 to the area of ​​the multiple connecting portions 220 of the embedded portion 2 exposed to the magnesium alloy body 1 can be no less than 2. Thus, by constructing the total area of ​​the embedded portion 2 covered by the magnesium alloy body 1 to be greater than the total area of ​​the embedded portion 2 exposed to the magnesium alloy body 1, it is possible to achieve a stable and firm covering of the embedded portion 2 by means of the relatively thick magnesium alloy body 1, ensuring that the composite structure has high structural strength as a whole, and also helping to improve the connection quality of the parts made of magnesium alloy (e.g., the magnesium alloy body 1) with parts (external parts) made of other materials.

[0124] Additionally, in some implementations, references Figure 1 and Figure 4 As shown, the inner edge of the insert 210 covered by the magnesium alloy body 1 and the inner edge of the connecting part 220 exposed by the insert 2 can have a first distance L1. The ratio of the first distance L1 to the wall thickness of the magnesium alloy body 1 is not less than 1. This arrangement helps to ensure that the composite structure is connected as a whole has high rigidity and durability, and ensures that the composite structure has high structural strength and high reliability.

[0125] Furthermore, in some implementations, references Figure 1 and Figure 4 As shown, the connecting part 220 may have an embedded edge 221 covered by the magnesium alloy body 1 and an exposed edge 222 exposed outside the magnesium alloy body 1. The length of the embedded edge 221 is greater than the length of the exposed edge 222. This arrangement ensures that there is a large bonding force between the magnesium alloy body 1 and the embedded part 2, and ensures that the composite structure connected as a whole has high rigidity and durability, thereby improving the overall structural strength and reliability of the composite structure.

[0126] In some possible embodiments, before placing the insert 2 in the cavity of the mold and before closing the mold, the preparation method may further include: forming a limiting part 230 on the insert 2. The limiting part 230 is used to cooperate with the magnesium alloy body 1 when the insert 2 is embedded inside the magnesium alloy body 1 to restrict the movement of the magnesium alloy body 1 and the insert 2. In this way, by setting the limiting part 230, the insert 2 can be stably and firmly embedded inside the magnesium alloy body 1, which is beneficial to improving the overall structural strength and reliability of the composite structure.

[0127] The limiting part 230 can be designed in any suitable manner. For example, in some embodiments, the limiting part 230 may include at least one of the limiting hole 231, the recess 232 and the protrusion 233. This disclosure does not specifically limit such variations. Those skilled in the art can adapt the specific structure of the limiting part 230 according to actual application needs.

[0128] For example, Figure 1 and Figure 2 The example shows that the insert 2 can be provided with a plurality of protrusions 233 at intervals, and at least one limiting hole 231 can be provided between two adjacent protrusions 233. With this configuration, after liquid or semi-solid magnesium alloy is filled into the cavity from the gate (not shown) of the mold (not shown), the liquid or semi-solid magnesium alloy can flow to the area between two adjacent protrusions 233 and fill the limiting hole 231. In this way, after the liquid or semi-solid magnesium alloy solidifies, a "pin" structure that cooperates with the limiting hole 231 can be formed, which can restrict the movement of the magnesium alloy body 1 and the insert 2, and ensure that the insert 2 is stably and firmly embedded in the interior of the magnesium alloy body 1.

[0129] in addition, Figure 1 and Figure 2 The location of the protrusion 233 is shown as an example, which can be formed as a connecting part 220, so as to enable the magnesium alloy body 1 to be connected to an external component via the connecting part 220 of the insert 2.

[0130] It is understood that this disclosure does not specifically limit the specific structural dimensions and external contours of the limiting part 230 (e.g., at least one of the limiting hole 231, recess 232, and protrusion 233). Those skilled in the art can design it adaptively according to actual application needs. The purpose is to enable the limiting part 230 to cooperate with the magnesium alloy body 1 when the insert 2 is embedded inside the magnesium alloy body 1, so as to restrict the movement of the magnesium alloy body 1 and the insert 2.

[0131] This disclosure exemplarily describes a method for preparing a composite structural component in one embodiment, with reference to... Figures 1 to 6 As shown.

[0132] Provide the insert 2 and preheat the insert 2.

[0133] The mold is opened, and a release agent is sprayed after the mold is opened.

[0134] Then, for example, a robotic arm is used to grasp the insert 2 and place it in the cavity of the mold. The insert 2 can be stably fixed in the cavity of the mold by means of, but not limited to, magnetic attraction or peripheral clamping and insert pressing.

[0135] After the corresponding insert 2 is fixed in place, the mold is closed.

[0136] The liquid or semi-solid magnesium alloy is then filled into the cavity through the mold gate, and the magnesium alloy body 1 and the insert 2 are integrally formed by, for example, high-pressure die casting or semi-solid molding process.

[0137] The connection portion 220 between the magnesium alloy body 1 and the insert 2 is subjected to anti-corrosion treatment to form a protective layer covering the outer surface of the magnesium alloy body 1 and the connection portion 220, thereby forming a composite structural component. The specific anti-corrosion process of the composite structural component can be adaptively designed according to the specific material of the insert 2 to reduce the risk of chemical corrosion of the magnesium alloy body 1. This has been exemplarily described above and will not be repeated here.

[0138] According to a third aspect of this disclosure, a composite structural component is provided, which is prepared using the preparation method provided in the second aspect above. Furthermore, this composite structural component also possesses all the beneficial effects of the preparation method of the composite structural component provided in the second aspect above, which will not be elaborated further herein.

[0139] According to a fourth aspect of this disclosure, a vehicle is provided that includes the composite structural member provided in the first aspect, or the composite structural member provided in the third aspect. Furthermore, the vehicle also possesses all the beneficial effects of the aforementioned composite structural member, which will not be elaborated further herein.

[0140] In some exemplary application scenarios, the aforementioned vehicles may be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc., and this disclosure is not limited thereto.

[0141] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0142] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0143] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A composite structural component for vehicles, characterized in that, include: Magnesium alloy body; and An insert is embedded inside the magnesium alloy body, and the insert has an embedding portion covered by the magnesium alloy body and a connecting portion exposed outside the magnesium alloy body. The magnesium alloy body is used to connect to an external component through the connecting portion. The wall thickness of the magnesium alloy body is greater than the wall thickness of the insert; The ratio of the area of ​​the plurality of embedded portions of the insert covered by the magnesium alloy body to the area of ​​the plurality of connecting portions of the insert exposed on the magnesium alloy body is not less than 2. There is a first distance between the inner edge of the embedding part covered by the magnesium alloy body and the inner edge of the connecting part of the embedding exposed on the magnesium alloy body, and the ratio of the first distance to the wall thickness of the magnesium alloy body is not less than 1. The connecting portion has an embedded edge covered by the magnesium alloy body and an exposed edge exposed to the magnesium alloy body, wherein the length of the embedded edge is greater than the length of the exposed edge.

2. The composite structural component for vehicles according to claim 1, characterized in that, The ratio of the wall thickness of the magnesium alloy body to the wall thickness of the insert is not less than 2; and / or, The magnesium alloy body is a thin-walled structural component.

3. The composite structural component for vehicles according to claim 1, characterized in that, The number of the embedding part and the connecting part are both multiple, and the multiple embedding parts and the multiple connecting parts are arranged alternately; and / or, The elastic modulus of the magnesium alloy body is configured to be smaller than that of the insert.

4. The composite structural component for vehicles according to claim 1, characterized in that, The insert comprises an aluminum alloy stamping or a steel stamping; and / or, The magnesium alloy body and the insert are integrally formed by high-pressure die casting or semi-solid molding process.

5. The composite structural component for vehicles according to claim 1, characterized in that, The insert has a limiting portion formed on it. The limiting portion is used to cooperate with the magnesium alloy body when the insert is embedded inside the magnesium alloy body, so as to restrict the movement of the magnesium alloy body and the insert.

6. The composite structural component for vehicles according to claim 5, characterized in that, The limiting portion includes at least one of a limiting hole, a recess, and a protrusion.

7. The composite structural component for vehicles according to claim 1, characterized in that, The composite structural component also includes a protective layer, which covers the outer surfaces of the magnesium alloy body and the connecting portion.

8. The composite structural component for vehicles according to claim 7, characterized in that, The area containing the outer surfaces of the magnesium alloy body and the connecting part includes a wet area and a dry area; Wherein, the magnesium alloy body and the connecting portion are provided with the protective layer on the outer surface of the dry area, the protective layer including a passivation layer; and / or, The protective layer is provided on the outer surface of the magnesium alloy body and the connecting part located in the wet area. The protective layer includes a passivation layer, or the protective layer includes a passivation layer and an electrophoretic layer, or the protective layer includes a passivation layer and a powder coating layer, or the protective layer includes a passivation layer, an electrophoretic layer and a powder coating layer.

9. A method for preparing a composite structural component for a vehicle, characterized in that, include: The insert is placed inside the cavity of the mold and the mold is closed; Magnesium alloy is filled into the cavity from the gate of the mold to form a magnesium alloy body covering the insert. The insert has an embedded portion covered by the magnesium alloy body and a connecting portion exposed outside the magnesium alloy body. The magnesium alloy body is connected to an external component through the connecting portion, and the wall thickness of the magnesium alloy body is configured to be greater than the wall thickness of the insert. The ratio of the area of ​​the plurality of embedded portions covered by the magnesium alloy body to the area of ​​the plurality of connecting portions exposed outside the magnesium alloy body is not less than 2. There is a first distance between the inner edge of the embedded portion covered by the magnesium alloy body and the inner edge of the connecting portion exposed outside the magnesium alloy body, and the ratio of the first distance to the wall thickness of the magnesium alloy body is not less than 1. The connecting portion has an embedded edge covered by the magnesium alloy body and an exposed edge exposed outside the magnesium alloy body, and the length of the embedded edge is greater than the length of the exposed edge.

10. The method for preparing a composite structural component for a vehicle according to claim 9, characterized in that, The gate is positioned away from the insert; and / or, Liquid or semi-solid magnesium alloy is filled into the cavity through the gate of the mold, so that the magnesium alloy body and the insert are integrally formed by high pressure die casting or semi-solid molding process. And / or, Before placing the insert in the cavity of the mold and closing the mold, the preparation method further includes: preheating the insert; And / or, The insert includes an aluminum alloy stamping or a steel stamping.

11. The method for preparing a composite structural component for a vehicle according to claim 9, characterized in that, After filling the cavity with magnesium alloy through the gate of the mold to form a magnesium alloy body covering the insert, the preparation method further includes: The magnesium alloy body and the connecting part are subjected to anti-corrosion treatment to form a protective layer covering the outer surface of the magnesium alloy body and the connecting part, thereby forming the composite structural component.

12. The method for preparing a composite structural component for a vehicle according to claim 11, characterized in that, The area containing the outer surfaces of the magnesium alloy body and the connecting part includes a wet area and a dry area. The anti-corrosion treatment of the magnesium alloy body and the connecting part to form a protective layer covering the outer surfaces of the magnesium alloy body and the connecting part includes: The outer surfaces of the magnesium alloy body and the connecting portion located in the dry area are passivated to form a passivation layer covering the outer surfaces of the magnesium alloy body and the connecting portion, the protective layer including the passivation layer; and / or, The outer surfaces of the magnesium alloy body and the connecting portion located in the wet area are coated to form a protective layer covering the outer surfaces of the magnesium alloy body and the connecting portion. The protective layer includes a passivation layer, or the protective layer includes a passivation layer and an electrophoretic layer, or the protective layer includes a passivation layer and a powder coating layer, or the protective layer includes a passivation layer, an electrophoretic layer, and a powder coating layer.

13. The method for preparing a composite structural component for a vehicle according to claim 9, characterized in that, The ratio of the wall thickness of the magnesium alloy body to the wall thickness of the insert is not less than 2; and / or, The magnesium alloy body is configured as a thin-walled structural component; and / or, The number of the embedding part and the connecting part are both multiple, and the multiple embedding parts and the multiple connecting parts are arranged alternately; and / or, The elastic modulus of the magnesium alloy body is configured to be smaller than that of the insert. And / or, Before placing the insert in the cavity of the mold and closing the mold, the preparation method further includes: forming a limiting part on the insert, the limiting part being used to cooperate with the magnesium alloy body when the insert is embedded inside the magnesium alloy body, so as to restrict the movement of the magnesium alloy body and the insert.

14. A composite structural component for a vehicle, characterized in that, The composite structural component is prepared using the preparation method described in any one of claims 9-13.

15. A vehicle, characterized in that, It includes the composite structural component for a vehicle as described in any one of claims 1-8, or the composite structural component for a vehicle as described in claim 14.

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