A thin-walled high-strength aluminum alloy material and a preparation method thereof

Abstract

The application provides a kind of thin-walled high-strength aluminum alloy material, the aluminum alloy material is composed of aluminum alloy and continuous "w" type reticular ceramic film, the mass ratio of the aluminum alloy and reticular ceramic film in the aluminum alloy material is 100:2.5-4, the aluminum alloy material is composed of the following components: Si is 1-1.2 parts, Cr is 0.1-0.15 parts, Mg is 0.6-0.75 parts, Fe is 0.1-0.25 parts, Zn is 0.05-0.1 parts, Al is 96-97.5 parts.In the application, the ceramic reinforcing film is prepared as a "w" type reticular ceramic film, and the "w" type reticular ceramic film is stacked to reinforce the aluminum alloy.The "w" type reticular film has a good energy absorption effect, can absorb external impact, and makes the aluminum alloy have impact resistance.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy materials, specifically to a thin-walled high-strength aluminum alloy material and its preparation method. Background Technology

[0002] Thin-walled castings offer significant advantages in the aerospace and automotive manufacturing industries due to their lightweight structure, which increases payload capacity and reduces energy loss. A pressing issue is meeting designers' requirements for the mechanical properties of thin-walled castings. Aluminum alloys, with their low density, high strength coefficient, and hardness after casting, are considered promising materials for thin-walled castings.

[0003] Ceramic-aluminum alloys combine the advantages of ceramic particles and aluminum alloys, overcoming the performance limitations of single materials. They possess superior properties such as lightweight, high rigidity, high strength, high fatigue resistance, and high temperature resistance, with mechanical properties far exceeding those of aluminum alloys, while maintaining the excellent processing and manufacturing properties of aluminum alloys. Nano-ceramic-aluminum alloy materials exhibit superior properties such as high rigidity, high strength, high fatigue resistance, and high temperature resistance. Developing nano-ceramic-aluminum alloy materials and optimizing their design for application in various automotive components can achieve goals such as weight reduction, cost reduction, and improved fatigue life in automobiles. Summary of the Invention

[0004] The technical problem to be solved: The purpose of this invention is to provide a thin-walled high-strength aluminum alloy material, which is reinforced by an electrospun ceramic film. The ceramic film is set into a "W" shaped mesh, and molten aluminum can be poured onto the ceramic film to obtain a thin-walled high-strength aluminum alloy material.

[0005] Technical solution: A thin-walled, high-strength aluminum alloy material, wherein the aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, and the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:2.5-4.

[0006] The aluminum alloy material is composed of the following components:

[0007] Si is 1-1.2 parts.

[0008] Cr is 0.1-0.15 parts.

[0009] Mg 0.6-0.75 parts

[0010] Fe content is 0.1-0.25 parts.

[0011] Zn content: 0.05-0.1 parts

[0012] Al was 96-97.5 parts.

[0013] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0014] S1. Preparation of electrospinning solution: Dissolve Al(NO3)3·9H2O in water, then add Al powder, the molar ratio of Al powder to Al(NO3)3·9H2O is 4-6:1, heat and reflux to react, remove insoluble impurities, then concentrate under reduced pressure, add manganese acetate solution, glacial acetic acid and appropriate amount of PVP, stir to obtain transparent and uniform sol;

[0015] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.1-0.2 mm;

[0016] S3. Sintering of ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and then sintered to obtain a "w"-shaped mesh ceramic membrane.

[0017] S4. Thin-walled high-strength aluminum alloy material: The “w”-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacking manner, and molten aluminum is poured in. After cooling, it is homogenized to obtain a pressure-resistant aluminum alloy material.

[0018] Preferably, in step S1, Al 3+ and Mn 2+ The molar ratio is 15-20:1.

[0019] Preferably, the sol contains 8-10% aluminum and has a viscosity of 5.9-7.2 mPa.

[0020] Preferably, the bending angle of the "w"-shaped mesh ceramic membrane is 30-45°.

[0021] Preferably, the sintering parameters are as follows: first, the temperature is increased from room temperature to 450-500℃ at a rate of 1-2℃·min⁻¹, held for 1 hour, then increased to 600-650℃ at a rate of 1℃·min⁻¹, held for 1 hour, and then increased to 900-950℃ at a rate of 4-5℃·min⁻¹, held for 1 hour, and then naturally cooled.

[0022] Preferably, the thickness of the "w"-shaped mesh ceramic film is 1.5-2.5 mm.

[0023] Preferably, the homogenization process involves first holding the temperature at 520-540℃ for 1.5-2.5 hours, then holding the temperature at 570-585℃ for 2.5-3.5 hours, and finally cooling the temperature to 200℃ with strong air and then water cooling.

[0024] Beneficial effects: This invention has the following advantages:

[0025] In this invention, Mn element is added to ceramic material, which will produce Al(MnFe)Si precipitate during alloy casting. After homogenization heat treatment, Al(MnFe)Si can better pin dislocations, so that the sample exhibits higher impact absorption energy under macroscopic conditions, which is more conducive to resisting harsh service environments.

[0026] In this invention, the ceramic reinforcing film is prepared as a "W"-shaped mesh ceramic film. When the "W"-shaped mesh ceramic film is laminated to reinforce the aluminum alloy, the "W"-shaped mesh film has a good energy absorption effect and can absorb external impacts, giving the aluminum alloy an impact-resistant effect.

[0027] In this invention, the bending angle of the "W"-shaped mesh ceramic membrane is 30-45°. The ceramic membrane at this angle has a better energy absorption effect, which makes the aluminum alloy material have a better impact resistance. Detailed Implementation

[0028] The present invention will be further described below with reference to embodiments. These embodiments are illustrative of the present invention, but the present invention is not limited to these embodiments:

[0029] Example 1

[0030] A thin-walled, high-strength aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, wherein the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:2.5.

[0031] The aluminum alloy material is composed of the following components: 1 part Si, 0.15 parts Cr, 0.6 parts Mg, 0.1 parts Fe, 0.05 parts Zn, and 96 parts Al.

[0032] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0033] S1. Preparation of electrospinning solution: Al(NO3)3·9H2O was dissolved in water, then Al powder was added, with a molar ratio of Al powder to Al(NO3)3·9H2O of 4:1. After heating under reflux, insoluble impurities were removed, followed by concentration under reduced pressure. Manganese acetate solution, glacial acetic acid, and an appropriate amount of PVP were then added. 3+ and Mn 2+ The molar ratio of the substances was 15:1. After stirring, a transparent and uniform sol was obtained. The sol contained 8% aluminum and had a viscosity of 5.9 mPa.

[0034] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.12 mm.

[0035] S3. Sintering of the ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and then sintered, first at 1℃·min. -1 The temperature was increased from room temperature to 450°C, held for 1 hour, and then increased at a rate of 1°C / min. -1 Heat to 600℃, hold for 1 hour, then increase the temperature by 4℃·min. -1 The temperature was increased to 950℃, and after holding at that temperature for 1 hour, it was naturally cooled to obtain a 1.5mm thick "W"-shaped mesh ceramic film with a bending angle of 30°.

[0036] S4. Thin-walled high-strength aluminum alloy material: The "w"-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacked manner, and molten aluminum is poured in. After cooling, it is homogenized. The homogenization process is to first hold at 520℃ for 2.5h, then hold at 585℃ for 2.5h, and finally cool with strong air to 200℃ and then water-cooled to obtain a pressure-resistant aluminum alloy material with a thickness of 4mm.

[0037] Example 2

[0038] A thin-walled, high-strength aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, wherein the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:4.

[0039] The aluminum alloy material is composed of the following components: 1.2 parts Si, 0.1 parts Cr, 0.75 parts Mg, 0.25 parts Fe, 0.1 parts Zn, and 97.5 parts Al.

[0040] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0041] S1. Preparation of electrospinning solution: Al(NO3)3·9H2O was dissolved in water, then Al powder was added, with a molar ratio of Al powder to Al(NO3)3·9H2O of 6:1. After heating under reflux, insoluble impurities were removed, followed by concentration under reduced pressure. Manganese acetate solution, glacial acetic acid, and an appropriate amount of PVP were then added. 3+ and Mn 2+ The molar ratio of the substances was 20:1. After stirring, a transparent and uniform sol was obtained. The sol contained 10% aluminum and had a viscosity of 7.2 mPa.

[0042] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.18 mm.

[0043] S3. Sintering of the ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and then sintered, first at 2℃·min. -1The temperature was increased from room temperature to 500°C, held for 1 hour, and then increased at a rate of 1°C / min. -1 Heat to 650℃, hold for 1 hour, then reduce temperature by 5℃·min. -1 The temperature was increased to 900℃, and after holding at that temperature for 1 hour, it was naturally cooled to obtain a "W"-shaped mesh ceramic film with a thickness of 1.8mm and a bending angle of 45°.

[0044] S4. Thin-walled high-strength aluminum alloy material: The "w"-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacked manner, and molten aluminum is poured in. After cooling, it is homogenized. The homogenization process is to first hold at 540℃ for 1.5h, then hold at 570℃ for 3.5h, and finally cool with strong air to 200℃ and then water-cooled to obtain a pressure-resistant aluminum alloy material with a thickness of 4mm.

[0045] Example 3

[0046] A thin-walled, high-strength aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, wherein the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:3.1.

[0047] The aluminum alloy material is composed of the following components: 1 part Si, 0.14 parts Cr, 0.64 parts Mg, 0.15 parts Fe, 0.05 parts Zn, and 97 parts Al.

[0048] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0049] S1. Preparation of electrospinning solution: Al(NO3)3·9H2O was dissolved in water, then Al powder was added, with a molar ratio of Al powder to Al(NO3)3·9H2O of 6:1. After heating under reflux, insoluble impurities were removed, followed by concentration under reduced pressure. Manganese acetate solution, glacial acetic acid, and an appropriate amount of PVP were then added. 3+ and Mn 2+ The molar ratio of the substances was 16:1. After stirring, a transparent and uniform sol was obtained. The sol contained 8% aluminum and had a viscosity of 6.8 mPa.

[0050] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.15 mm.

[0051] S3. Sintering of the ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and then sintered, first at 1℃·min. -1 The temperature was increased from room temperature to 450°C, held for 1 hour, and then increased at a rate of 1°C / min. -1 Heat to 600℃, hold for 1 hour, then increase the temperature by 4℃·min. -1The temperature is increased to 900℃, and after holding at that temperature for 1 hour, it is naturally cooled to obtain a 1.5mm thick "W"-shaped mesh ceramic film with a bending angle of 40°.

[0052] S4. Thin-walled high-strength aluminum alloy material: The "w"-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacked manner, and molten aluminum is poured in. After cooling, it is homogenized. The homogenization process is to first keep it at 525℃ for 2 hours, then keep it at 580℃ for 2.5 hours, and finally cool it with strong wind to 200℃ and then water cool it to obtain a pressure-resistant aluminum alloy material with a thickness of 4mm.

[0053] Example 4

[0054] A thin-walled, high-strength aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, wherein the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:3.7.

[0055] The aluminum alloy material is composed of the following components: 1.2 parts Si, 0.12 parts Cr, 0.7 parts Mg, 0.2 parts Fe, 0.08 parts Zn, and 96.5 parts Al.

[0056] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0057] S1. Preparation of electrospinning solution: Al(NO3)3·9H2O was dissolved in water, then Al powder was added, with a molar ratio of Al powder to Al(NO3)3·9H2O of 4:1. After heating under reflux, insoluble impurities were removed, followed by concentration under reduced pressure. Manganese acetate solution, glacial acetic acid, and an appropriate amount of PVP were then added. 3+ and Mn 2+ The molar ratio of the substances was 20:1. After stirring, a transparent and uniform sol was obtained. The sol contained 10% aluminum and had a viscosity of 6.5 mPa.

[0058] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.15 mm.

[0059] S3. Sintering of the ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and then sintered, first at 2℃·min. -1 The temperature was increased from room temperature to 500°C, held for 1 hour, and then increased at a rate of 1°C / min. -1 Heat to 650℃, hold for 1 hour, then reduce temperature by 5℃·min. -1 The temperature is increased to 950℃, kept at that temperature for 1 hour, and then naturally cooled to obtain a 2mm thick "W"-shaped mesh ceramic film with a bending angle of 30°.

[0060] S4. Thin-walled high-strength aluminum alloy material: The "w"-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacked manner, and molten aluminum is poured in. After cooling, it is homogenized. The homogenization process is to first keep it at 535℃ for 1.5h, then keep it at 575℃ for 3h, and finally cool it with strong wind to 200℃ and then water cool it to obtain a pressure-resistant aluminum alloy material with a thickness of 4mm.

[0061] Example 5

[0062] A thin-walled, high-strength aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, wherein the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:3.5.

[0063] The aluminum alloy material is composed of the following components: 1.1 parts Si, 0.13 parts Cr, 0.66 parts Mg, 0.18 parts Fe, 0.06 parts Zn, and 96.8 parts Al.

[0064] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0065] S1. Preparation of electrospinning solution: Al(NO3)3·9H2O was dissolved in water, then Al powder was added, with a molar ratio of Al powder to Al(NO3)3·9H2O of 5:1. After heating under reflux to react, insoluble impurities were removed, and then the solution was concentrated under reduced pressure. Manganese acetate solution, glacial acetic acid, and an appropriate amount of PVP were added. 3+ and Mn 2+ The molar ratio of the substances was 18:1. After stirring, a transparent and uniform sol was obtained. The sol contained 9% aluminum and had a viscosity of 6.9 mPa.

[0066] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.15 mm.

[0067] S3. Sintering of the ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and then sintered, first at 1℃·min. -1 The temperature was increased from room temperature to 480℃, held for 1 hour, and then increased at a rate of 1℃·min. -1 Heat to 620℃, hold for 1 hour, then increase the temperature by 4℃·min. -1 The temperature was increased to 930℃, and after holding at that temperature for 1 hour, it was naturally cooled to obtain a 1.8mm thick "W"-shaped mesh ceramic film with a bending angle of 30°.

[0068] S4. Thin-walled high-strength aluminum alloy material: The "w"-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacked manner, and molten aluminum is poured in. After cooling, it is homogenized. The homogenization process is to first keep it at 530℃ for 1.5h, then keep it at 580℃ for 3h, and finally cool it with strong wind to 200℃ and then water cool it to obtain a pressure-resistant aluminum alloy material with a thickness of 4mm.

[0069] Comparative Example 1

[0070] A thin-walled, high-strength aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, wherein the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:3.6.

[0071] The aluminum alloy material is composed of the following components: 1.1 parts Si, 0.13 parts Cr, 0.66 parts Mg, 0.18 parts Fe, 0.06 parts Zn, and 96.8 parts Al.

[0072] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0073] S1. Preparation of electrospinning solution: Al(NO3)3·9H2O was dissolved in water, then Al powder was added, with a molar ratio of Al powder to Al(NO3)3·9H2O of 5:1. After heating under reflux to react, insoluble impurities were removed, and then the solution was concentrated under reduced pressure. Manganese acetate solution, glacial acetic acid, and an appropriate amount of PVP were added. 3+ and Mn 2+ The molar ratio of the substances was 18:1. After stirring, a transparent and uniform sol was obtained. The sol contained 9% aluminum and had a viscosity of 6.9 mPa.

[0074] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.15 mm.

[0075] S3. Sintering of the ceramic membrane: The electrospun membrane prepared in step S2 is sintered, first at 1℃·min -1 The temperature was increased from room temperature to 480℃, held for 1 hour, and then increased at a rate of 1℃·min. -1 Heat to 620℃, hold for 1 hour, then increase the temperature by 4℃·min. -1 The temperature is increased to 930℃, kept at that temperature for 1 hour, and then naturally cooled to obtain a mesh ceramic film.

[0076] S4. Thin-walled high-strength aluminum alloy material: The mesh ceramic film prepared in step S3 is added to the casting mold in a stacked manner, and molten aluminum is poured in. After cooling, it is homogenized. The homogenization process is to first keep it at 530℃ for 1.5h, then keep it at 580℃ for 3h, and finally cool it with strong wind to 200℃ and then water cool it to obtain a pressure-resistant aluminum alloy material with a thickness of 4mm.

[0077] Comparative Example 2

[0078] A thin-walled, high-strength aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, wherein the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material is 100:3.4.

[0079] The aluminum alloy material is composed of the following components: 1 part Si, 0.14 parts Cr, 0.64 parts Mg, 0.15 parts Fe, 0.05 parts Zn, 0.1 parts Mn, and 97 parts Al.

[0080] The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps:

[0081] S1. Preparation of electrospinning solution: Al(NO3)3·9H2O was dissolved in water, and then Al powder was added. The molar ratio of Al powder to Al(NO3)3·9H2O was 6:1. After heating and reflux reaction, insoluble impurities were removed, and then the solution was concentrated under reduced pressure. Glacial acetic acid and an appropriate amount of PVP were added and stirred to obtain a transparent and uniform sol. The sol contained 8% aluminum and had a viscosity of 6.8 mPa.

[0082] S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.15 mm.

[0083] S3. Sintering of the ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and then sintered, first at 1℃·min. -1 The temperature was increased from room temperature to 450°C, held for 1 hour, and then increased at a rate of 1°C / min. -1 Heat to 600℃, hold for 1 hour, then increase the temperature by 4℃·min. -1 The temperature is increased to 900℃, and after holding at that temperature for 1 hour, it is naturally cooled to obtain a 1.5mm thick "W"-shaped mesh ceramic film with a bending angle of 40°.

[0084] S4. Thin-walled high-strength aluminum alloy material: The "w"-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacked manner, and molten aluminum is poured in. After cooling, it is homogenized. The homogenization process is to first keep it at 525℃ for 2 hours, then keep it at 580℃ for 2.5 hours, and finally cool it with strong wind to 200℃ and then water cool it to obtain a pressure-resistant aluminum alloy material with a thickness of 4mm.

[0085] Tensile specimens were designed according to national standard GB / T 228.1-2010, and tensile tests were conducted using an electronic universal testing machine with a tensile rate of 1 mm / min. Impact tests were conducted on an impact testing machine in accordance with GB / T 229-2020.

[0086] Tensile strength / MPa Elongation / % V-shaped impact energy / J Example 1 341 14.6 101 Example 2 345 15.2 99 Example 3 338 15.1 100 Example 4 242 14.9 97 Example 5 235 15.0 102 Comparative Example 1 284 13.2 85 Comparative Example 2 296 17.0 92

[0087] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A thin-walled high-strength aluminum alloy material, characterized in that: The aluminum alloy material is composed of an aluminum alloy and a continuous "W"-shaped mesh ceramic film, with the mass ratio of the aluminum alloy to the mesh ceramic film in the aluminum alloy material being 100:2.5-4. The aluminum alloy material is composed of the following components: Si is 1-1.2 parts. Cr is 0.1-0.15 parts. Mg 0.6-0.75 parts Fe content is 0.1-0.25 parts. Zn content: 0.05-0.1 parts Al was 96-97.5 parts; The above-mentioned method for preparing thin-walled high-strength aluminum alloy materials includes the following steps: S1. Preparation of electrospinning solution: Dissolve Al(NO3)3·9H2O in water, then add Al powder, with a molar ratio of Al powder to Al(NO3)3·9H2O of 4-6:

1. After heating under reflux, remove insoluble impurities, then concentrate under reduced pressure, and add manganese acetate solution, glacial acetic acid, and an appropriate amount of PVP. 3+ and Mn 2+ The molar ratio of the substances is 15-20:1, and a transparent and uniform sol is obtained by stirring. S2. Preparation of electrospun film: The sol prepared in step S1 is electrospun to obtain an electrospun film with a thickness of 0.1-0.2 mm; S3. Sintering of ceramic membrane: The electrospun membrane prepared in step S2 is bent and fixed, and sintered to obtain a "w"-shaped mesh ceramic membrane. The bending angle of the "w"-shaped mesh ceramic membrane is 30-45°. S4. Thin-walled high-strength aluminum alloy material: The "w"-shaped mesh ceramic film prepared in step S3 is added to the casting mold in a stacking manner, and molten aluminum is poured in. After cooling, it is homogenized to obtain a pressure-resistant aluminum alloy material.

2. The thin-walled high-strength aluminum alloy material according to claim 1, characterized in that: The sol contains 8-10% aluminum and has a viscosity of 5.9-7.2 mPa.

3. The thin-walled high-strength aluminum alloy material according to claim 1, characterized in that: The sintering parameters are initially set at 1-2℃·min. -1 The temperature is increased from room temperature to 450-500℃, held for 1 hour, and then increased at a rate of 1℃·min. -1 Heat to 600-650℃, hold for 1 hour, then reduce temperature by 4-5℃ / min. -1 The temperature is increased to 900-950℃, and then kept at that temperature for 1 hour before being allowed to cool naturally.

4. The thin-walled high-strength aluminum alloy material according to claim 1, characterized in that: The thickness of the "w"-shaped mesh ceramic membrane is 1.5-2.5 mm.

5. The thin-walled high-strength aluminum alloy material according to claim 1, characterized in that: The homogenization process involves first holding the temperature at 520-540℃ for 1.5-2.5 hours, then holding it at 570-585℃ for 2.5-3.5 hours, and finally cooling it with strong air to 200℃ followed by water cooling.