Preparation method of aluminum alloy, aluminum alloy, aluminum alloy structural part and vehicle
Through the combination of electromagnetic induction technology and ultrasonic treatment, the problem of removing coarse intermetallic compounds in aluminum alloys is solved, and the mechanical properties and production applicability of aluminum alloys are improved.
Patent Information
- Application Number
- CN202510363260.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-06-24
AI Technical Summary
The removal methods of crude intermetallic compounds in existing aluminum alloys have problems such as high cost, high environmental risks and influencing mechanical properties.
Electromagnetic induction technology is used to adsorb the aluminum alloy at the melting temperature, remove coarse intermetallic compounds, and refine the grains through ultrasonic treatment to improve the microstructure.
Effectively remove coarse intermetallic compounds in aluminum alloys, improve the strength, plasticity and surface quality of aluminum alloys, is suitable for large-scale production, and meets the mechanical performance needs of vehicles.
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Figure CN120193175A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of alloy materials, and particularly to a preparation method of aluminum alloy, aluminum alloy, aluminum alloy structural parts, and vehicles. Background Art
[0002] Coarse intermetallic compounds are intermetallic compounds with relatively large sizes and specific crystal structures formed in metals or alloys. Coarse intermetallic compounds (especially iron-rich phase compounds) in aluminum alloys can destroy the uniformity of the aluminum alloy structure, significantly reduce the processing performance, forming performance, fatigue strength, toughness, and surface quality of aluminum alloys, and are difficult to eliminate through heat treatment.
[0003] In related technologies, the methods for removing coarse intermetallic compounds in aluminum alloys generally include: (1) adding refining agents and / or slagging agents to the molten aluminum alloy to convert impurity elements (such as iron elements) that may form coarse intermetallic compounds into solid particles that are easier to remove, and making the solid particles float and aggregate more easily. (2) Controlling the growth of coarse intermetallic compounds by reducing the casting temperature, or reducing burning loss, element segregation, etc., thereby reducing the formation of coarse intermetallic compounds.
[0004] However, the above methods still have certain defects. For example, the large amount of use of refining agents and / or slagging agents will increase costs and pose certain environmental protection risks; reducing the casting temperature may lead to insufficient fluidity of the alloy liquid, affecting the filling effect, and even affecting the mechanical properties of the aluminum alloy. Summary of the Invention
[0005] This application provides a preparation method of aluminum alloy, aluminum alloy, aluminum alloy structural parts, and vehicles to solve the technical problems existing in related technologies. Specifically, the following technical solutions are included.
[0006] In a first aspect, this application provides a preparation method of aluminum alloy. The preparation method includes: melting aluminum alloy raw materials at a melting temperature and maintaining stirring during the melting process to obtain a molten aluminum alloy; placing the molten aluminum alloy in a receiving groove of a processing container, and performing an adsorption treatment on the molten aluminum alloy through electromagnetic induction technology to remove coarse intermetallic compounds in the molten aluminum alloy; continuing to perform ultrasonic treatment on the molten aluminum alloy, and obtaining the aluminum alloy after the molten aluminum alloy cools.
[0007] In some possible implementation manners, the intensity of the electromagnetic induction magnetic field applied in the adsorption treatment is 18 A / m - 22 A / m.
[0008] In some possible implementation manners, the treatment time of the adsorption treatment is 3 s - 5 s.
[0009] In some possible embodiments, the aluminum alloy raw materials include metallic aluminum, aluminum-copper alloy, aluminum-manganese alloy, aluminum-silicon alloy, aluminum-titanium alloy, and metallic magnesium.
[0010] In some possible embodiments, the smelting treatment of the aluminum alloy raw materials includes: adding the metallic aluminum and the aluminum-copper alloy to a smelting device at 720°C - 730°C, performing primary smelting and stirring to obtain a molten alloy after primary smelting; adding an intermediate alloy to the molten alloy, and adding metallic magnesium after the intermediate alloy is melted, performing secondary smelting and stirring to obtain the molten aluminum alloy; wherein the intermediate alloy includes the aluminum-manganese alloy, the aluminum-silicon alloy, and the aluminum-titanium alloy, and the temperature of the intermediate alloy when added to the smelting device is 710°C - 720°C.
[0011] In some possible embodiments, the ultrasonic treatment includes: applying ultrasonic waves with a set frequency to the molten aluminum alloy through a titanium alloy ultrasonic vibrating rod.
[0012] In some possible embodiments, the set frequency includes 8 MHz - 12 MHz.
[0013] In a second aspect, the present application provides an aluminum alloy prepared by using the preparation method according to any one of the first aspects of the present application.
[0014] In a third aspect, the present application provides an aluminum alloy structural member, which includes the aluminum alloy according to the second aspect of the present application.
[0015] In a fourth aspect, the present application provides a vehicle, which includes the aluminum alloy according to the second aspect of the present application or uses the aluminum alloy structural member according to the third aspect of the present application.
[0016] The beneficial effects of the technical solution provided by the present application at least include:
[0017] The preparation method of aluminum alloy provided by the embodiments of the present application can, on the one hand, perform adsorption treatment on the aluminum alloy melt through non-contact electromagnetic induction technology, enabling the coarse intermetallic compounds (especially iron-rich phase compounds) in the aluminum alloy melt to undergo directional migration under the action of electromagnetic force, thereby separating from the aluminum alloy melt. While removing the coarse intermetallic compounds, it can also avoid introducing new impurity elements. On the other hand, the present application can further refine the grains of the aluminum alloy and improve the microstructure of the aluminum alloy through ultrasonic treatment to improve the quality of the aluminum alloy. In particular, the preparation method of the aluminum alloy provided by the embodiments of the present application is simple in operation, easy to repeat, can be processed continuously online, and is suitable for large-scale production. In addition, the aluminum alloy and aluminum alloy structural parts prepared by this method have good performance in terms of strength, plasticity, surface quality, etc. due to the low content of coarse intermetallic compounds and small grain size, and can be widely used in vehicle production, meeting the mechanical property requirements of vehicles and promoting the lightweight development of vehicles. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0019] Figure 1 It is a schematic diagram of the preparation method of the aluminum alloy provided by the embodiments of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] Aiming at the technical problems that the coarse intermetallic compounds in aluminum alloy are difficult to eliminate by heat treatment, the removal methods using refining agents and / or slagging agents are costly and have certain environmental protection risks, and the method of reducing the casting temperature may affect the mechanical properties of aluminum alloy, the embodiments of the present invention provide a preparation method of aluminum alloy, which can not only efficiently remove the coarse intermetallic compounds in aluminum alloy, but also is simple in operation, and the prepared aluminum alloy also has good mechanical property performance.
[0021] The first aspect of the present application discloses a preparation method of aluminum alloy. Figure 1 It is a schematic diagram of the preparation method of the aluminum alloy provided by the embodiments of the present application. Refer to Figure 1 The preparation method of the aluminum alloy provided by the embodiments of the present application may include the following steps.
[0022] Step 110, at the melting temperature, perform melting treatment on the aluminum alloy raw materials and keep stirring during the melting process to obtain an aluminum alloy melt.
[0023] Schematically, the aluminum alloy raw materials may include, for example, the raw materials of metallic aluminum determined according to the aluminum alloy formula and the raw materials of any other metallic or non-metallic elements added as required. In some embodiments, the aluminum alloy raw materials may include, for example, metallic aluminum, the raw materials of elemental copper (Cu), the raw materials of elemental manganese (Mn), the raw materials of elemental titanium (Ti), the raw materials of elemental magnesium (Mg), and the raw materials of elemental silicon (Si).
[0024] To better control the melting temperature, more precisely control the quality and composition of the aluminum alloy, and improve the element recovery rate during the melting process, the raw materials of any other metallic or non-metallic elements may be, for example, alloys or compounds of the element and metallic aluminum. In some embodiments, the raw materials of elemental copper (Cu) may include, for example, aluminum-copper alloys, the raw materials of elemental manganese (Mn) may include, for example, aluminum-manganese alloys, the raw materials of elemental titanium (Ti) may include, for example, aluminum-titanium alloys, and the raw materials of elemental silicon (Si) may include, for example, aluminum-silicon alloys. The aluminum alloy raw materials may include, for example, metallic aluminum and aluminum-copper alloys, aluminum-manganese alloys, aluminum-silicon alloys, aluminum-titanium alloys, and metallic magnesium.
[0025] The melting temperature may be a fixed temperature determined according to the characteristics of each component in the aluminum alloy raw materials and the process requirements, or a dynamically changing temperature range determined according to the characteristics of each component in the aluminum alloy raw materials and the process requirements. The present application does not impose any restrictions on this.
[0026] For example, when the aluminum alloy raw materials include metallic aluminum, aluminum-copper alloys, aluminum-manganese alloys, aluminum-silicon alloys, aluminum-titanium alloys, and metallic magnesium, the operation of melting the aluminum alloy raw materials at the melting temperature and maintaining stirring during the melting process to obtain the aluminum alloy melt may be: at 720°C - 730°C, add metallic aluminum and aluminum-copper alloys to the melting device, perform a first melting and stirring to obtain the alloy liquid after the first melting; add the master alloy to the alloy liquid, and add metallic magnesium after the master alloy melts, perform a second melting and stirring to obtain the aluminum alloy melt.
[0027] Among them, the temperature of the first melting may be determined according to the melting point of metallic aluminum (660°C) and the melting point of the aluminum-copper alloy (500°C - 650°C), such that the temperature of the first melting is higher than the melting points of metallic aluminum and the aluminum-copper alloy. During the first melting process, the aluminum-copper alloy can be used to introduce copper (Cu) elements into the aluminum alloy, significantly improving the strength and hardness of the aluminum alloy.
[0028] In some embodiments, the stirring duration for stirring the alloy liquid during the first smelting process includes 25 min - 35 min. For example, it may include 25 min, 26 min, 27 min, 28 min, 29 min, 30 min, 31 min, 32 min, 33 min, 34 min, 35 min, etc., or other values within the above range. The present application does not impose any restrictions on this.
[0029] The temperature of the second smelting can be determined based on the temperature of the first smelting and the melting points of aluminum-titanium alloy (640°C - 680°C), aluminum-silicon alloy (577°C - 640°C), aluminum-manganese alloy (600°C - 650°C), and metallic magnesium (648.8°C), such that the temperature of the second smelting is lower than that of the first smelting and higher than the melting points of aluminum-titanium alloy, aluminum-silicon alloy, aluminum-manganese alloy, and metallic magnesium, so as to avoid problems such as burning loss and coarse grains. During the second smelting process, aluminum-titanium alloy, aluminum-silicon alloy, and aluminum-manganese alloy can introduce titanium (Ti) element, silicon (Si) element, and manganese (Mn) element into the aluminum alloy to enhance the corrosion resistance, wear resistance, high-temperature resistance, etc. of the aluminum alloy and refine the grains of the aluminum alloy. In addition, metallic magnesium can increase the fluidity of the master alloy and the alloy liquid, enabling each element to be more evenly mixed, thereby improving the mechanical properties of the aluminum alloy. In some embodiments, the stirring duration for stirring the molten aluminum alloy during the second smelting process includes 25 min - 35 min. For example, it may include 25 min, 26 min, 27 min, 28 min, 29 min, 30 min, 31 min, 32 min, 33 min, 34 min, 35 min, etc., or other values within the above range. The present application does not impose any restrictions on this.
[0030] In some embodiments, the smelting treatment of the aluminum alloy raw materials can be carried out, for example, in a smelting furnace or any other smelting device capable of smelting alloys. The present application does not impose any restrictions on this.
[0031] Step 120: Place the molten aluminum alloy in the accommodating groove of the processing container, and perform an adsorption treatment on the molten aluminum alloy through electromagnetic induction technology to remove the coarse intermetallic compounds in the molten aluminum alloy.
[0032] Schematically, the coarse intermetallic compounds in the molten aluminum alloy can be, for example, generated during the smelting process of the aluminum alloy raw materials by unwanted impurity elements (such as unwanted iron elements) in the aluminum alloy raw materials or inappropriate processing techniques. For example, they can include iron-rich phase compounds or any other compounds with larger sizes that affect the properties of the aluminum alloy. The method for adsorbing treatment of the molten aluminum alloy provided by the embodiments of the present application can remove the coarse intermetallic compounds in the molten aluminum alloy, especially iron-rich phase compounds, in a non-contact manner, avoiding the introduction of new unwanted impurity elements to improve the properties of the aluminum alloy.
[0033] Optionally, the treatment container can be, for example, a container specifically designed for the adsorption treatment, or a container with other uses but capable of performing the adsorption treatment on the molten aluminum alloy. For example, it can be a transfer device for transferring the molten aluminum alloy from the smelting device to other processes. In some embodiments, the treatment container can be, for example, a long U-shaped groove to facilitate better deposition and collection of the coarse intermetallic compounds aggregated after the adsorption treatment. The method for adsorbing treatment of the molten aluminum alloy in the transfer device provided by the embodiments of the present application can achieve on-line continuous production, thus simplifying the process of aluminum alloy preparation and reducing the production cost of the aluminum alloy.
[0034] In some embodiments, the method for removing impurities by adsorbing treatment of the molten aluminum alloy using electromagnetic induction technology can include: during the flow of the molten aluminum alloy in the treatment container, the mobility of the coarse intermetallic compounds, especially iron-rich phase compounds, in the molten aluminum alloy decreases under the action of the induction magnetic field, and they aggregate and deposit on the bottom or side wall of the accommodating groove of the treatment container, thereby separating the molten aluminum alloy from the coarse intermetallic compounds during the flow process, achieving the effect of removing the coarse intermetallic compounds in the molten aluminum alloy.
[0035] In some embodiments, the treatment container can be selected from magnetic conductive materials with high temperature resistance and corrosion resistance. For example, it can include iron-based composite materials with high temperature resistance and corrosion resistance.
[0036] In some embodiments, when performing the adsorbing treatment on the molten aluminum alloy by electromagnetic induction technology, the intensity of the applied electromagnetic induction magnetic field is 18 A / m - 22 A / m. For example, it can include 18 A / m, 18.5 A / m, 19 A / m, 19.5 A / m, 20 A / m, 20.5 A / m, 21 A / m, 21.5 A / m, 22 A / m, etc., or other values within the above range. The present application does not make any restrictions on this.
[0037] In some embodiments, when performing an adsorption treatment on the molten aluminum alloy by electromagnetic induction technology, the treatment time of the adsorption treatment is 3 s - 5 s. For example, it may include 3 s, 3.5 s, 4 s, 4.5 s, 5 s, etc., or other values within the above range. The present application does not impose any restrictions on this.
[0038] In the embodiments of the present application, an adsorption treatment is performed on the molten aluminum alloy in the treatment container by applying an electromagnetic induction magnetic field, so that the coarse intermetallic compounds in the molten aluminum alloy, especially the iron-rich phase compounds, can aggregate and deposit in the treatment container, thereby achieving the purpose of removing the coarse intermetallic compounds, greatly improving the quality of the aluminum alloy, and the method is simple to operate, easy to repeat, and suitable for large-scale production.
[0039] Step 130: Continuously perform ultrasonic treatment on the molten aluminum alloy, and after the molten aluminum alloy cools, obtain the aluminum alloy.
[0040] In some embodiments, the method for performing ultrasonic treatment on the molten aluminum alloy may include, for example: applying ultrasonic waves with a set frequency to the molten aluminum alloy through a titanium alloy ultrasonic vibration rod.
[0041] In some embodiments, when performing ultrasonic treatment on the molten aluminum alloy, the set frequency applied to the molten aluminum alloy may include 8 MHz - 12 MHz. For example, it may be 8 MHz, 8.5 MHz, 9 MHz, 9.5 MHz, 10 MHz, 10.5 MHz, 11 MHz, 11.5 MHz, 12 MHz, etc., or other values within the above range. The present application does not impose any restrictions on this.
[0042] The method for performing ultrasonic treatment on the adsorbed molten aluminum alloy provided by the embodiments of the present application can remove some gases and non-metallic impurities in the molten aluminum alloy through the cavitation effect, acoustic streaming effect, thermal effect, etc. generated by ultrasonic waves in the molten aluminum alloy, improve the microstructure of the aluminum alloy, refine the grains of the aluminum alloy, and further enhance the quality of the aluminum alloy.
[0043] In some embodiments, the method for preparing the aluminum alloy provided by the embodiments of the present application may further include: detecting the obtained aluminum alloy; adjusting the melting temperature during the melting treatment of the aluminum alloy raw materials according to the detection results. The method for preparing the aluminum alloy provided by the embodiments of the present application can further improve the production efficiency and the quality of the aluminum alloy by timely detecting the obtained aluminum alloy and optimizing the process in the aluminum alloy preparation process (such as the melting temperature of the aluminum alloy raw materials) guided by the detection results.
[0044] For example, the operation of detecting the obtained aluminum alloy may specifically include: detecting the aluminum alloy produced in the same batch to obtain a detection result; obtaining a calculation result of the aluminum alloy produced in the same batch according to the detection result and the grain size and impurity content (such as the content of coarse intermetallic compounds) required in the aluminum alloy standard (such as GB / T 1173-2013 "Cast Aluminum Alloys", or other relevant aluminum alloy standards). Among them, the calculation result of the aluminum alloy produced in the same batch may include, for example, whether the grain size and impurity content (such as the content of coarse intermetallic compounds) of the aluminum alloy meet the standards, the difference between the grain size and impurity content (such as the content of coarse intermetallic compounds) of the aluminum alloy and the grain size and impurity content (such as the content of coarse intermetallic compounds) in the aluminum alloy standard. The present application does not impose any restrictions on this.
[0045] In some embodiments, the method of detecting the aluminum alloy produced in the same batch may include, for example, metallographic analysis.
[0046] On the one hand, the preparation method of the aluminum alloy provided by the embodiments of the present application can perform an adsorption treatment on the aluminum alloy melt through a non-contact electromagnetic induction technology, so that the coarse intermetallic compounds (especially iron-rich phase compounds) in the aluminum alloy melt can undergo directional migration under the action of electromagnetic force, thereby separating from the aluminum alloy melt. While removing the coarse intermetallic compounds, it can also avoid introducing new impurity elements; on the other hand, the present application can further refine the grains of the aluminum alloy and improve the microstructure of the aluminum alloy through ultrasonic treatment to improve the quality of the aluminum alloy. In particular, the preparation method of the aluminum alloy provided by the embodiments of the present application is simple in operation, easy to repeat, can be processed continuously online, and is suitable for large-scale production. In addition, the aluminum alloy and aluminum alloy structural parts prepared by this method have better performance in terms of strength, plasticity, surface quality, etc. due to the low content of coarse intermetallic compounds and small grain size, and can be widely used in vehicle production, meeting the mechanical property requirements of vehicles and promoting the lightweight development of vehicles.
[0047] The present application also provides an aluminum alloy prepared by using the preparation method described above. The aluminum alloy provided by the embodiments of the present application has better performance in terms of strength, plasticity, surface quality, etc. due to the low content of coarse intermetallic compounds and small grain size.
[0048] The present application also provides an aluminum alloy structural part prepared by using the aluminum alloy described above. The aluminum alloy used in the aluminum alloy structural part provided by the embodiments of the present application has a low content of coarse intermetallic compounds and small grain size, so that the aluminum alloy structural part has better performance in terms of strength, plasticity, surface quality, etc.
[0049] In some embodiments, the aluminum alloy structural members may include, for example, plates, profiles, tubes, bars, etc. for load bearing and / or support, or may include aluminum alloy structural members applied to wheels, vehicle bodies, and vehicle seat brackets in a vehicle, etc. The present application does not impose any restrictions in this regard.
[0050] When preparing the aluminum alloy structural members, they can be directly prepared based on the aluminum alloy raw materials. As in the preparation methods involved in the above-mentioned aluminum alloys, before the aluminum alloy melt cools, casting and optional rolling and other treatments can be directly carried out to obtain the aluminum alloy structural members. Alternatively, the previously prepared aluminum alloy can also be melted, and then casting and optional rolling and other treatments can be carried out to obtain the aluminum alloy structural members.
[0051] The present application also provides a vehicle, which includes the aluminum alloy as described above or includes the aluminum alloy structural members as described above. In the vehicle provided by the embodiments of the present application, the content of coarse intermetallic compounds in the aluminum alloy structural members is low, the grain size is small, and it has good performance in terms of strength, plasticity, surface quality, etc. It can not only meet the vehicle's requirements for the mechanical properties of aluminum alloy materials, but also promote the lightweight development of the vehicle.
[0052] Based on any of the above-mentioned implementation methods, an exemplary preparation method of an aluminum alloy can be as follows. This aluminum alloy includes the following elements: elemental aluminum, elemental copper, elemental titanium, elemental manganese, elemental silicon, and elemental magnesium.
[0053] Step 1: Provide aluminum alloy raw materials according to the aluminum alloy formula. Among them, the aluminum alloy raw materials may include, for example, metallic aluminum, aluminum-copper alloy, aluminum-titanium alloy, aluminum-silicon alloy, aluminum-manganese alloy, and metallic magnesium.
[0054] Step 2: At 730 °C, add metallic aluminum and aluminum-copper alloy to the melting device, conduct primary melting and stir for 30 min to obtain the alloy liquid after primary melting.
[0055] Step 3: Add intermediate alloys to the alloy liquid, and add metallic magnesium after the intermediate alloys are melted, conduct secondary melting and stir to obtain the aluminum alloy melt. Among them, the intermediate alloys include aluminum-manganese alloy, aluminum-silicon alloy, and aluminum-titanium alloy, and the temperature of the intermediate alloys when added to the melting device is 720 °C.
[0056] Step 4: Place the aluminum alloy melt in a long U-shaped groove, and perform adsorption treatment on the aluminum alloy melt through electromagnetic induction technology to remove the coarse intermetallic compounds in the aluminum alloy melt. Among them, the intensity of the electromagnetic induction magnetic field applied in the adsorption treatment is 20 A / m, and the adsorption time is 3 s - 5 s.
[0057] Step 5: Apply ultrasonic waves of 10 MHz to the aluminum alloy melt through a titanium alloy ultrasonic vibration rod.
[0058] Step 6: After the molten aluminum alloy is cooled, aluminum alloy is obtained.
[0059] The above description is only for the convenience of those skilled in the art to understand the technical solution of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. A method for preparing an aluminum alloy, characterized in that: The preparation method comprises: The aluminum alloy raw material is melted at a melting temperature and stirred during the melting process to obtain an aluminum alloy melt; Placing the aluminum alloy melt in a containing tank of a processing container, and performing adsorption treatment on the aluminum alloy melt by electromagnetic induction technology to remove coarse intermetallic compounds in the aluminum alloy melt; The aluminum alloy melt is continuously ultrasonically treated, and after the aluminum alloy melt is cooled, the aluminum alloy is obtained.
2. The preparation method according to claim 1, characterized in that: The intensity of the electromagnetic induction magnetic field applied during the adsorption treatment is 18A / m-22A / m.
3. The preparation method according to claim 2, characterized in that: The treatment time of the adsorption treatment is 3s-5s.
4. The preparation method according to claim 1, characterized in that: The aluminum alloy raw materials include metal aluminum, aluminum-copper alloy, aluminum-manganese alloy, aluminum-silicon alloy, aluminum-titanium alloy and metal magnesium.
5. The preparation method according to claim 4, characterized in that: The smelting process of the aluminum alloy raw material comprises: Adding the metal aluminum and the aluminum-copper alloy into a smelting device at 720° C.-730° C., performing a primary smelting and stirring to obtain a primary smelted alloy liquid; Adding a master alloy to the alloy liquid, and adding metal magnesium after the master alloy is melted, performing secondary smelting and stirring to obtain the aluminum alloy melt; Wherein, the intermediate alloy includes the aluminum-manganese alloy, the aluminum-silicon alloy and the aluminum-titanium alloy, and the temperature of the intermediate alloy when added into the smelting device is 710°C-720°C.
6. The preparation method according to any one of claims 1 to 5, characterized in that: The ultrasonic treatment comprises: Ultrasonic waves of a set frequency are applied to the aluminum alloy melt through a titanium alloy ultrasonic vibrator.
7. The preparation method according to claim 6, characterized in that: The set frequency includes 8 MHz-12 MHz.
8. An aluminum alloy, characterized in that: The aluminum alloy is prepared by the preparation method described in any one of claims 1 to 7.
9. An aluminum alloy structural part, characterized in that: The aluminum alloy structural part comprises the aluminum alloy according to claim 8.
10. A vehicle, characterized in that: The vehicle comprises the aluminum alloy of claim 8 or adopts the aluminum alloy structural member of claim 9.