Aluminum alloy material for electric car power battery tray and preparation method thereof

A technology of aluminum alloy materials and power batteries, which is applied in the field of aluminum alloy processing, can solve problems such as fracture toughness, stress corrosion cracking resistance, insufficient welding performance, high sensitivity to intergranular corrosion, and insufficient fracture toughness, etc., to achieve high strength, Good corrosion resistance and uniform structure

Active Publication Date: 2019-03-15
LVMEI ALUMINUM
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The development of automobile lightweight has put forward higher and higher requirements for the comprehensive performance of aluminum alloy materials. At present, the Al-Mg-Si alloys represented by 6063, 6005, 6061 and other brands have excellent extrusion processing performance, but The strength is still low, and the fracture toughness, stress corrosion cracking resistance and welding performance are still

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  • Aluminum alloy material for electric car power battery tray and preparation method thereof

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[0037] Example 1

[0038] An aluminum alloy material for electric vehicle power battery trays. The composition and mass percentage composition of the aluminum alloy material are: Mg 1.00%, Si 0.82%, Cu 0.88%, Mn 0.6%, Zr 0.05%, Fe≤0.3% , The sum of other impurities is ≤0.15%, and the balance is Al.

[0039] A method for preparing the aluminum alloy material used for the power battery tray of electric vehicles as described above includes the following steps:

[0040] A. Melting and refining: smelting according to the composition and mass percentage of aluminum alloy materials, and refining in argon with a purity of 99.99%;

[0041] B. On-line refinement: add refiner to the aluminum alloy material refined in step A for on-line refinement;

[0042] C. On-line degassing and impurity removal: the aluminum alloy material after the on-line refinement in step B is subjected to online degassing, and the compound filter device is used to remove impurities;

[0043] D. Casting: Ultrasonic semi-con...

Example Embodiment

[0054] Example 2

[0055] An aluminum alloy material for electric vehicle power battery trays. The composition and mass percentage composition of the aluminum alloy material are: Mg 1.06%, Si 0.88%, Cu 0.92%, Mn 0.7%, Zr 0.10%, Fe≤0.2% , The sum of other impurities is ≤0.15%, and the balance is Al.

[0056] A method for preparing the aluminum alloy material used for the power battery tray of electric vehicles as described above includes the following steps:

[0057] A. Melting and refining: smelting according to the composition and mass percentage of aluminum alloy materials, and refining in argon with a purity of 99.99%;

[0058] B. On-line refinement: add refiner to the aluminum alloy material refined in step A for on-line refinement;

[0059] C. On-line degassing and impurity removal: the aluminum alloy material after the on-line refinement in step B is subjected to online degassing, and the compound filter device is used to remove impurities;

[0060] D. Casting: Ultrasonic semi-con...

Example Embodiment

[0071] Example 3

[0072] An aluminum alloy material for electric vehicle power battery trays. The composition and mass percentage of the aluminum alloy material are: Mg 1.09%, Si 0.91%, Cu 0.95%, Mn 0.73%, Zr 0.15%, Fe≤0.2% , The sum of other impurities is ≤0.15%, and the balance is Al.

[0073] A method for preparing the aluminum alloy material used for the power battery tray of electric vehicles as described above includes the following steps:

[0074] A. Melting and refining: smelting according to the composition and mass percentage of aluminum alloy materials, and refining in argon with a purity of 99.99%;

[0075] B. On-line refinement: add refiner to the aluminum alloy material refined in step A for on-line refinement;

[0076] C. On-line degassing and impurity removal: the aluminum alloy material after the on-line refinement in step B is subjected to online degassing, and the compound filter device is used to remove impurities;

[0077] D. Casting: Ultrasonic semi-continuous cas...

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Abstract

The invention relates to the technical field of aluminum alloy machining, in particular to an aluminum alloy material for an electric car power battery tray and a preparation method thereof. The aluminum alloy material comprises, by mass, 1.00-1.18% of Mg, 0.82-1.00% of Si, 0.88-1.02% of Cu, 0.64-0.82% of Mn, 0.05-0.25% of Zr, less than or equal to 0.3% of Fe, less than or equal to 0.15% of othertotal impurities, and the balance Al. The aluminum alloy material provided by the invention is uniform in texture and fine in grain, has high strength, tensile strength, impact toughness, stress corrosion cracking resistance, weldability and other performance, the tensile strength is greater than 350 MPa, the exfoliation corrosion performance is not less than the grade EA, and the strength coefficient of a friction stirring welding head is greater than 85%. The aluminum alloy material is applied to the car power battery tray and can meet the requirements for light weight of cars.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy material used for an electric vehicle power battery tray and a preparation method thereof. Background technique [0002] Among automotive lightweight materials, alloy materials have the characteristics of light weight and easy recycling, and their comprehensive cost performance is higher than that of steel, magnesium, plastic, carbon fiber, etc., and they are the preferred materials for lightweight automobiles. my country is currently the largest automobile manufacturing and consuming country in the world, but our country is still relatively backward in the lightweight of automobiles. At present, the average aluminum consumption per car in my country is only 115 kg, which is lower than the global single-vehicle aluminum consumption of 169 kg. Compared with countries such as Japan and Japan, the gap is even bigger. Many well-known foreign automak...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/02C22C1/06C22F1/047
CPCC22C1/026C22C1/06C22C21/08C22F1/002C22F1/047
Inventor 叶健龙王景
Owner LVMEI ALUMINUM
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