Aluminum alloy stamping and die casting combined processing technology and aluminum alloy processed part

Abstract

The embodiment of the present application relates to the technical field of precision machining, and discloses a machining process combining stamping and die casting of aluminum alloy, which comprises the following steps: preparing a stamping base material; preparing a die casting alloy; stamping: using a stamping machine to stamp the stamping base material to obtain a main body bearing structure; transition layer treatment: performing laser micro-fusion engraving and plasma activation treatment on a preset region of the surface of the main body bearing structure to cover an interface transition layer on the preset region of the surface of the main body bearing structure, and obtaining a processed main body bearing structure; wherein, an amorphous aluminum alloy formed by mixing Al-96.1wt%, Mg-3wt%, Si-0.8wt% and Zr-0.1wt% is selected as the interface transition layer; and die casting: die casting the die casting alloy to the preset position of the main body bearing structure to obtain an aluminum alloy machining piece. Through the above method, the machining complexity and the strength of the aluminum alloy machining piece can be considered.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of precision machining technology, and in particular to a processing technology combining stamping and die-casting of aluminum alloy and an aluminum alloy machined part. Background Art

[0002] Currently, for the processing of aluminum alloy workpieces, stamping and die-casting are separate processes, each with its own advantages and disadvantages. Stamping parts have high strength but simple structure, while die-casting parts have complex structure but lower strength. Stamping process: Cold deformation forms fiber streamlines (tensile strength ↑30%), but is limited by the mold stroke and cannot form deep cavities / reinforcement ribs (complexity limited to Level 2). Die-casting process: Thin-walled grid structures can be formed (complexity reaches Level 5), but rapid solidification leads to coarse grains (tensile strength ≤280MPa). Traditional processes require a trade-off between strength and complexity, but there is currently a lack of an effective solution that combines stamping and die-casting to take into account both processing strength and complexity. Summary of the Invention

[0003] In view of the above problems, an embodiment of the present invention provides a processing technology and aluminum alloy processed parts that combine stamping and die-casting of aluminum alloys, which are used to solve the problem in the prior art that it is impossible to take into account both the strength and complexity of the workpiece processing during the processing of aluminum alloy workpieces.

[0004] According to one aspect of an embodiment of the present invention, a processing technology combining stamping and die-casting of an aluminum alloy is provided, the process comprising:

[0005] Preparation of a stamping substrate: forming the stamping substrate by mixing 98.7 wt% Al, 0.8 wt% Mg, 1.0 wt% Si, 0.25 wt% Cu, and 0.15 wt% Sc;

[0006] Preparation of a die-casting alloy: Al-97-98.3wt%, Mg-0.6-1.0wt%, Si-0.8-1.2wt%, Cu-0.2-0.5wt%, and 0.1-0.3% Sc element are added to prepare the die-casting alloy;

[0007] Stamping: using a stamping machine to stamp the stamping substrate to obtain a main bearing structure;

[0008] Transition layer treatment: laser micro-melting and plasma activation treatment are performed on a predetermined area on the surface of the main load-bearing structure, and an interface transition layer is covered on the predetermined area on the surface of the main load-bearing structure to obtain a treated main load-bearing structure; wherein an amorphous aluminum alloy formed by mixing Al-96.1wt%, Mg-3wt%, Si-0.8wt%, and Zr-0.1wt% is selected as the interface transition layer;

[0009] Die casting: die-casting the die-cast alloy to the preset position of the main bearing structure to obtain an aluminum alloy workpiece.

[0010] In an optional manner, the use of a punching machine to pre-punch the punching substrate to obtain a main body bearing structure includes:

[0011] Preparation of aluminum alloy wire: Al-97.72wt%, Mg-1.2wt%, Si-0.9wt%, Sc-0.18wt% are mixed to form a diameter Aluminum alloy wire with tensile strength ≥300MPa;

[0012] Processing a deep U-shaped groove on the edge of the main bearing structure;

[0013] An aluminum alloy wire is embedded in the deep U-shaped groove, and the aluminum alloy wire is combined with the main bearing structure through metallurgy.

[0014] In an optional manner, the stamping substrate is formed by mixing Al-98.7wt%, Mg-0.8wt%, Si-1.0wt%, Cu-0.25wt%, and Sc-0.15wt%, further comprising:

[0015] Melting: Using argon protection melting, Sc is added in the form of Al-2% Sc master alloy, the melt temperature is 720℃±10℃, and the hydrogen content after refining is ≤0.1mL / 100gAl;

[0016] Hot rolling treatment: rolling temperature 400°C, total reduction rate 80%, final rolling thickness 2.5mm, retaining dynamic recrystallization grain size ≤15μm.

[0017] In an optional manner, the method of using a punching machine to punch the punching substrate to obtain a main body bearing structure further includes:

[0018] A laser displacement sensor is used to monitor the displacement and deformation of the stamping substrate in real time;

[0019] According to the displacement and deformation, the punching operation of the punching machine is adjusted to perform punching correction.

[0020] In an optional manner, the laser micro-melting and plasma activation treatment is performed on a preset area on the surface of the main body bearing structure, and an interface transition layer is covered on the preset area on the surface of the main body bearing structure to obtain the treated main body bearing structure, including:

[0021] The laser beam is shaped, a spatial light modulator is used to generate an annular spot, and a spiral scanning path is set;

[0022] Inducing plasma resonance in a preset area on the surface of the main supporting structure according to a multi-pulse cumulative effect to form a nanocolumn array;

[0023] The interface transition layer is evenly covered on a preset area on the surface of the main body bearing structure to obtain a treated main body bearing structure.

[0024] In an optional manner, after melting the interface transition layer, the interface transition layer is evenly covered on a preset area on the surface of the main body bearing structure to obtain a processed main body bearing structure, including:

[0025] melting the interface transition layer to obtain a liquid amorphous aluminum alloy;

[0026] On the surface of the main bearing structure, a 30 μm thick amorphous aluminum alloy is pre-deposited by single-roll melt spinning to cover the preset area.

[0027] In an optional manner, die-casting the die-cast alloy to the preset position of the main bearing structure to obtain an aluminum alloy workpiece includes:

[0028] placing the main bearing structure into a die-casting mold and securing it with tapered positioning pins and hydraulic clamps in the die-casting mold;

[0029] melting the die-casting alloy to obtain a liquid die-casting alloy;

[0030] The liquid die-casting alloy is guided to the predetermined area through the flow channel system of the die-casting mold, covering the interface transition layer to form a complex structure;

[0031] The mold temperature in the stamping zone is controlled to be 250°C, the mold temperature in the transition zone is controlled to be 400°C, and the mold temperature in the die-casting zone is controlled to be 180°C; wherein, the transition zone is the area on the mold corresponding to the interface transition layer; the die-casting zone is the area on the mold corresponding to the die-casting alloy, and the stamping zone is the area on the mold corresponding to the main bearing structure.

[0032] In an optional manner, after die-casting the die-cast alloy to the preset position of the main bearing structure to obtain an aluminum alloy workpiece, the process further includes:

[0033] Performing a graded aging treatment of 180° C.×2 hours+120° C.×8 hours on the aluminum alloy workpiece;

[0034] performing micro-arc oxidation treatment on the surface of the aluminum alloy workpiece;

[0035] Vibration aging with a vibration frequency of 80-120 Hz is used to reduce the residual stress of the aluminum alloy workpiece.

[0036] According to another aspect of an embodiment of the present invention, there is provided an aluminum alloy workpiece, which is obtained by processing according to the above-mentioned processing technology combining stamping and die-casting of the aluminum alloy.

[0037] The embodiments of the present invention effectively combine the die-casting and stamping processes by preparing a stamping substrate, preparing a die-casting alloy, stamping, treating a transition layer, and then die-casting, thereby achieving a balance between complexity and strength. Furthermore, by providing a transition layer treatment, the die-casting alloy can be effectively combined with the stamping part, thereby achieving a balance between the processing complexity and workpiece strength of the aluminum alloy workpiece. Furthermore, by adding aluminum alloy wire during the stamping process, the workpiece strength can be effectively enhanced.

[0038] The above description is only an overview of the technical solutions of the embodiments of the present invention. In order to more clearly understand the technical means of the embodiments of the present invention, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the drawings. In the drawings:

[0040] Figure 1 A schematic diagram showing a process flow of a stamping and die-casting combined processing technology for aluminum alloy provided by an embodiment of the present invention;

[0041] Figure 2 A schematic flow chart of a stamping process in a stamping and die-casting combined processing technique for aluminum alloy provided by an embodiment of the present invention is shown;

[0042] Figure 3 A schematic diagram shows a process of processing a preset area on the surface of a main bearing structure by using a femtosecond laser in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0044] Figure 1 FIG. 1 shows a flow chart of a processing technology combining stamping and die casting of aluminum alloy provided by an embodiment of the present invention, as shown in FIG. Figure 1 As shown, the process includes the following steps:

[0045] Step 110: Prepare a stamping substrate.

[0046] The stamping substrate is formed by mixing 98.7 wt% Al, 0.8 wt% Mg, 1.0 wt% Si, 0.25 wt% Cu and 0.15 wt% Sc. Specifically, the following steps are included:

[0047] Melting: A stamping base material is prepared by mixing 98.7wt% Al, 0.8wt% Mg, 1.0wt% Si, 0.25wt% Cu, and 0.15wt% Sc. The metal raw materials are placed in a melting furnace and heated to approximately 750°C to completely melt and evenly mix the components. The melted alloy is poured into a metal mold preheated to 300°C and cooled to produce an ingot for the stamping base material.

[0048] Hot rolling: Rolling temperature: 400°C, total reduction: 80%, final thickness: 2.5mm, retaining dynamically recrystallized grain size ≤15μm. Specifically, the stamped substrate is heated to 550°C, held for 2 hours for solution treatment, and then rapidly water-quenched. The solution-treated ingot is cold-rolled into sheet of the desired thickness. The cold-rolled sheet is then aged at 170°C for 1 hour to enhance strength and hardness.

[0049] Step 120: Prepare a die-casting alloy.

[0050] The die-casting alloy is prepared by mixing 97-98.3 wt% Al, 0.6-1.0 wt% Mg, 0.8-1.2 wt% Si, 0.2-0.5 wt% Cu, and adding 0.1-0.3% Sc elements. Specifically, the die-casting alloy is prepared by mixing the elements according to the proportions of 97-98.3 wt% Al, 0.6-1.0 wt% Mg, 0.8-1.2 wt% Si, 0.2-0.5 wt% Cu, and 0.1-0.3% Sc. The metal raw materials of the above components are placed in a melting furnace and heated to about 750°C to completely melt the components and mix them evenly. The smelted alloy liquid is poured into a metal mold preheated to 200°C, and a die-casting alloy ingot is obtained after cooling. The die-casting alloy ingot is heated to 540°C, kept warm for 1 hour for solution treatment, and then quickly water-quenched. The ingot after solution treatment was subjected to aging treatment at 130°C for 4 hours to improve the strength and hardness of the material.

[0051] Step 130: Stamping.

[0052] Among them, a stamping machine is used to stamp the stamping substrate to obtain the main body bearing structure. In an embodiment of the present invention, the main body bearing structure is the main part of the aluminum alloy workpiece, for example, it can be a battery tray for new energy vehicles. Specifically, a high-precision servo stamping machine is used to stamp the stamping substrate sheet that has been heat-treated. During the stamping process, the strain rate is controlled in the range of 10^-310^-2s^-1, the elongation of the material fiber tissue is maintained at ≥15%, and the forming temperature is controlled at 150-200°C. , and the main body bearing structure is obtained. During the stamping process, a laser displacement sensor is used to monitor the displacement and deformation of the stamping substrate in real time; according to the displacement and deformation, the stamping operation of the stamping machine is adjusted to perform stamping corrections.

[0053] Among them, in order to strengthen the strength of the main bearing structure, such as Figure 2 As shown, the embodiment of the present invention also adds aluminum alloy wire to the main bearing structure. Specifically, it includes the following steps:

[0054] Step 301: Prepare aluminum alloy wire: Al-97.72wt%, Mg-1.2wt%, Si-0.9wt%, Sc-0.18wt% are mixed to form a diameter Aluminum alloy wire with tensile strength ≥300MPa.

[0055] Step 302: Processing a deep U-shaped groove on the edge of the main bearing structure.

[0056] Step 303: embedding an aluminum alloy wire in the deep U-shaped groove, and combining the aluminum alloy wire with the main bearing structure through metallurgy.

[0057] By embedding aluminum alloy wires at the edge of the main load-bearing structure, the strength of the main load-bearing structure is increased. One embodiment of the present invention does not specifically limit the specific location and amount of aluminum alloy wires to be added, and can be set accordingly according to specific application scenarios.

[0058] Step 140: Transition layer processing.

[0059] Among them, laser micro-melting and plasma activation treatment are performed on a preset area on the surface of the main bearing structure, and an interface transition layer is covered on the preset area on the surface of the main bearing structure to obtain a treated main bearing structure; wherein, Al-96.1wt%, Mg-3wt%, Si-0.8wt%, and Zr-0.1wt% are selected to form an amorphous aluminum alloy mixed and prepared as the interface transition layer.

[0060] Among them, such as Figure 3 As shown, the embodiment of the present invention processes a preset area on the surface of the main bearing structure by using a femtosecond laser, which mainly includes the following steps:

[0061] Step 410: shaping the laser beam, generating an annular light spot using a spatial light modulator, and setting a spiral scanning path.

[0062] Step 420: Inducing plasmon resonance in a predetermined region on the surface of the main support structure based on the cumulative effect of multiple pulses to form a nanopillar array. In one embodiment, the nanopillar array has a diameter of 200 nm and a depth of 1 μm.

[0063] Step 430: uniformly covering the interface transition layer on a preset area on the surface of the main body bearing structure to obtain a processed main body bearing structure.

[0064] By performing laser micro-melting on a preset area of ​​the surface of the main bearing structure, a three-dimensional interlocking structure with a depth of 50-100μm is created, so that the surface roughness Ra is controlled at 6.3-12.5μm.

[0065] Step 440: Melt the interface transition layer to obtain liquid amorphous aluminum alloy.

[0066] Step 450: Pre-deposit a 30 μm thick layer of amorphous aluminum alloy on the surface of the main bearing structure by single-roll melt spinning to cover the preset area.

[0067] Step 150: Die-casting: The die-casting alloy is die-casted to the preset position of the main bearing structure to obtain an aluminum alloy workpiece.

[0068] Among them, die casting is specifically carried out in the following ways:

[0069] First, the mold is preheated to 250±10°C, the main bearing structure is placed in the die-casting mold, and fixed by the tapered positioning pins and hydraulic clamps in the die-casting mold, so as to achieve precise positioning of the preset position of the main bearing structure.

[0070] Afterwards, the die-casting alloy is melted to obtain a liquid die-casting alloy. Specifically, the heat-treated die-casting alloy is heated to 680±10° C. to completely melt it.

[0071] The die-casting mold then directs the liquid die-casting alloy to the predetermined area through the die-casting mold's flow channel system, covering the interface transition layer. The die-casting mold temperature is controlled at 250°C in the stamping zone, 400°C in the transition zone, and 180°C in the die-casting zone, ensuring a tight bond between the die-casting alloy and the main support structure, forming a complex structure. The transition zone is the area of ​​the mold corresponding to the interface transition layer; the die-casting zone is the area of ​​the mold corresponding to the die-casting alloy; and the stamping zone is the area of ​​the mold corresponding to the main support structure. The die-casting mold in this embodiment of the present invention comprises a stamping zone, a die-casting zone, and a transition zone. The stamping zone utilizes a two-layer nested structure: an inner layer of H13 die steel with a thermal conductivity of 24 W / m·K and an outer layer of copper alloy with a thermal conductivity of 400 W / m·K. Heat is rapidly dissipated through the high thermal conductivity layer. The die-casting zone is embedded with a MoSi2 heating element, capable of withstanding temperatures up to 1600°C. The surface is coated with an Al2O3-TiO2 composite ceramic, improving thermal shock resistance by 50%. A gradient heat conduction groove is set in the transition zone with a width of 0.5 to 2 mm, and the heat flow direction is adjusted by changing the groove depth.

[0072] Specifically, a 680°C liquid die-cast alloy melt impacts the surface of the interface transition layer at a speed of 6 m / s, penetrating the femtosecond laser-etched nano-columnar structures to form a three-dimensional anchor and achieve mechanical interlocking. During the holding pressure phase, a parameter of 120 MPa / 1.2 s is used, allowing the Zr element in the interface transition layer to diffuse into the die-cast alloy to a depth of 50-80 nm, suppressing the formation of brittle phases such as AlFeSi and enabling elemental diffusion between the interface transition layer and the die-cast alloy. By setting the local temperature of the interface to 580°C, a quaternary Al-Mg-Si-Zr eutectic phase is formed through transient liquid phase diffusion, increasing the shear strength to 280 MPa. Prior to the 680°C liquid die-cast alloy melt impacting the interface transition layer at a speed of 6 m / s, a 50 nm thick Al2O3 coating with a thermal conductivity of 30 W / m·K is sputtered onto the interface transition layer to protect it from direct thermal shock from the die-cast melt. After die-casting is complete, a micro-spray liquid nitrogen system embedded within the mold delivers transient cooling to the transition zone at a flow rate of 10L / min, locking in the amorphous structure. This setup precisely maintains a low temperature in the stamping zone even under the high-temperature die-casting environment, increasing fiber retention from 60% in conventional processes to over 90%. This makes it particularly suitable for the manufacture of aluminum alloy parts requiring both high strength and complex formability.

[0073] After obtaining the aluminum alloy workpiece, the processing technology of the embodiment of the present invention further includes the following steps:

[0074] Performing a graded aging treatment of 180° C.×2 hours+120° C.×8 hours on the aluminum alloy workpiece;

[0075] performing micro-arc oxidation treatment on the surface of the aluminum alloy workpiece;

[0076] Vibration aging with a vibration frequency of 80-120 Hz is used to reduce the residual stress of the aluminum alloy workpiece.

[0077] The embodiments of the present invention effectively combine the die-casting and stamping processes by preparing a stamping substrate, preparing a die-casting alloy, stamping, treating a transition layer, and then die-casting, thereby achieving a balance between complexity and strength. Furthermore, by providing a transition layer treatment, the die-casting alloy can be effectively combined with the stamping part, thereby achieving a balance between the processing complexity and workpiece strength of the aluminum alloy workpiece. Furthermore, by adding aluminum alloy wire during the stamping process, the workpiece strength can be effectively enhanced.

[0078] An embodiment of the present invention further provides an aluminum alloy workpiece, which is obtained by using the above-mentioned processing technology combining stamping and die-casting of the aluminum alloy, and will not be described in detail here.

[0079] The algorithm or demonstration provided herein are not inherently relevant to any particular computer, virtual system or other equipment. Various general-purpose systems may also be used together with the teachings based on this. According to the above description, it is apparent that the structure required for constructing this type of system. In addition, the embodiment of the present invention is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the above description of specific languages ​​is for the purpose of disclosing the best mode of the present invention.

[0080] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0081] Similarly, it should be understood that in order to streamline the present invention and facilitate understanding of one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim.

[0082] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed so far can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) can be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0083] It should be noted that the above embodiments illustrate rather than limit the invention, and that alternative embodiments may be devised by a person skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments should not be understood as limiting the order of execution unless otherwise specified.

Claims

1. A processing technology combining stamping and die casting of aluminum alloy, characterized in that: The process comprises: Preparation of a stamping substrate: forming the stamping substrate by mixing 98.7 wt % of Al, 0.8 wt % of Mg, 1.0 wt % of Si, 0.25 wt % of Cu, and 0.15 wt % of Sc; Preparation of a die-casting alloy: Al-97-98.3wt%, Mg-0.6-1.0wt%, Si-0.8-1.2wt%, Cu-0.2-0.5wt%, and 0.1-0.3% Sc element are added to prepare the die-casting alloy; Stamping: using a stamping machine to stamp the stamping substrate to obtain a main bearing structure; Transition layer treatment: laser micro-melting and plasma activation treatment are performed on a predetermined area on the surface of the main load-bearing structure, and an interface transition layer is covered on the predetermined area on the surface of the main load-bearing structure to obtain a treated main load-bearing structure; wherein an amorphous aluminum alloy formed by mixing Al-96.1wt%, Mg-3wt%, Si-0.8wt%, and Zr-0.1wt% is selected as the interface transition layer; Die casting: die-casting the die-cast alloy into the preset area of ​​the main bearing structure to obtain an aluminum alloy workpiece.

2. The process according to claim 1, characterized in that The method of pre-punching the punching substrate using a punching machine to obtain a main body bearing structure includes: Preparation of aluminum alloy wire: Al-97.72 wt%, Mg-1.2 wt%, Si-0.9 wt%, Sc-0.18 wt% are mixed to form an aluminum alloy wire with a diameter of φ1.2 mm±0.02 mm and a tensile strength of ≥300 MPa; Processing a deep U-shaped groove on the edge of the main bearing structure; An aluminum alloy wire is embedded in the deep U-shaped groove, and the aluminum alloy wire is combined with the main bearing structure through metallurgy.

3. The process according to claim 1, characterized in that The stamping substrate is formed by mixing 98.7wt% of Al, 0.8wt% of Mg, 1.0wt% of Si, 0.25wt% of Cu, and 0.15wt% of Sc, further comprising: Melting: Using argon protection melting, Sc is added in the form of Al-2%Sc master alloy, the melt temperature is 720℃±10℃, and the hydrogen content after refining is ≤0.1mL / 100gAl; Hot rolling treatment: rolling temperature 400℃, total reduction rate 80%, final rolling thickness 2.5mm, retaining dynamic recrystallization grain size ≤15μm.

4. The process according to claim 2, characterized in that The method further comprises: using a punching machine to punch the punching substrate to obtain a main body bearing structure; A laser displacement sensor is used to monitor the displacement and deformation of the stamping substrate in real time; According to the displacement and deformation, the punching operation of the punching machine is adjusted to perform punching correction.

5. The process according to claim 1, characterized in that The laser micro-melting and plasma activation treatment is performed on a preset area on the surface of the main body bearing structure, and an interface transition layer is covered on the preset area on the surface of the main body bearing structure to obtain the treated main body bearing structure, including: The laser beam is shaped, a spatial light modulator is used to generate an annular spot, and a spiral scanning path is set; Inducing plasma resonance in a preset area on the surface of the main supporting structure according to a multi-pulse cumulative effect to form a nanocolumn array; The interface transition layer is evenly covered on a preset area on the surface of the main body bearing structure to obtain a treated main body bearing structure.

6. The process according to claim 5, characterized in that After the interface transition layer is melted, it is evenly covered on a preset area on the surface of the main body bearing structure to obtain a processed main body bearing structure, including: melting the interface transition layer to obtain a liquid amorphous aluminum alloy; On the surface of the main bearing structure, a 30 μm thick amorphous aluminum alloy is pre-deposited by single-roll melt spinning to cover the preset area.

7. The process according to any one of claims 1 to 6, characterized in that The die-casting alloy is die-casted into the preset area of ​​the main bearing structure to obtain an aluminum alloy workpiece, comprising: placing the main bearing structure into a die-casting mold and securing it with tapered positioning pins and hydraulic clamps in the die-casting mold; melting the die-casting alloy to obtain a liquid die-casting alloy; The liquid die-casting alloy is guided to the predetermined area through the flow channel system of the die-casting mold, covering the interface transition layer to form a complex structure; The mold temperature in the stamping zone is controlled to be 250°C, the mold temperature in the transition zone is controlled to be 400°C, and the mold temperature in the die-casting zone is controlled to be 180°C; wherein, the transition zone is the area on the mold corresponding to the interface transition layer; the die-casting zone is the area on the mold corresponding to the die-casting alloy, and the stamping zone is the area on the mold corresponding to the main bearing structure.

8. The process according to any one of claims 1 to 6, characterized in that After die-casting the die-cast alloy into the preset area of ​​the main bearing structure to obtain an aluminum alloy workpiece, the process further includes: Performing a graded aging treatment of 180° C.×2 hours+120° C.×8 hours on the aluminum alloy workpiece; performing micro-arc oxidation treatment on the surface of the aluminum alloy workpiece; Vibration aging with a vibration frequency of 80-120 Hz is used to reduce the residual stress of the aluminum alloy workpiece.

9. An aluminum alloy workpiece, characterized in that: The aluminum alloy workpiece is obtained by processing the aluminum alloy by combining stamping and die-casting according to any one of claims 1 to 8.

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