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A kind of aluminum-zinc alloy material for new energy vehicles and production method thereof

A technology for new energy vehicles and alloy materials, which is applied in the field of aluminum-zinc alloy materials for new energy vehicles and its production, which can solve the problems of reduced stress corrosion cracking resistance, deterioration of extrusion processing performance, and reduced toughness, etc., to achieve improved cleanliness degree, to avoid adverse effects, to reduce the effect of porosity

Active Publication Date: 2020-05-26
ANHUI HIGH TECH POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only the extrusion processing performance deteriorates, but also the toughness is reduced, it is easy to crack when subjected to impact, and the stress corrosion cracking resistance will also be reduced, so it is not suitable for shock-absorbing structural parts of automobiles
Limit the use of aluminum alloys in automobiles, especially new energy vehicles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An aluminum-zinc alloy material for new energy vehicles, characterized in that: the alloy composition of the aluminum alloy is calculated by mass fraction: Zn: 9.5, Cu: 1.2, Mg: 1.1, Zr: 0.4, Sn: 0.05, Si: 0.01 , Fe: 0.02, Co: 0.01, La: 0.01, B: 0.001, Cr: 0.002, Ti: 0.001, the balance is aluminum and unavoidable impurities, and the Zn / Mg ratio is 8.6, other single impurities ≤ 0.005% , the sum of impurities ≤ 0.1%.

[0038] The production method of the aluminum-zinc alloy material for new energy vehicles, the specific process steps are:

[0039] (1) According to the designed aluminum alloy composition ratio, take industrial pure aluminum and pure zinc with more than 99.99% as the main raw materials respectively, set the melting temperature of pure aluminum at 680-740°C, and add an appropriate amount of More than 99.99% of pure magnesium, more than 99.99% of pure Sn, Al-5Zr%, and Cu, Co, La, Cr, and B are added in the form of low-melting intermediate alloys; Si, Fe, ...

Embodiment 2

[0045] An aluminum-zinc alloy material for new energy vehicles, characterized in that: the alloy composition of the aluminum alloy is calculated by mass fraction: Zn: 9.6, Cu: 1.25, Mg: 1.1, Zr: 0.45, Sn: 0.06, Si: 0.02 , Fe: 0.025, Co: 0.015, La: 0.015, B 0.003, Cr: 0.003, Ti: 0.0015, the balance is aluminum and unavoidable impurities, and the Zn / Mg ratio is 8.7, other single impurities ≤ 0.005%, The sum of impurities ≤ 0.1%.

[0046] The production method of the aluminum-zinc alloy material for new energy vehicles, the specific process steps are:

[0047] (1) According to the designed aluminum alloy composition ratio, take industrial pure aluminum and pure zinc with more than 99.99% as the main raw materials respectively, set the melting temperature of pure aluminum at 680-740°C, and add an appropriate amount of More than 99.99% of pure magnesium, more than 99.99% of pure Sn, Al-5Zr%, and Cu, Co, La, Cr, and B are added in the form of low-melting intermediate alloys; Si, Fe...

Embodiment 3

[0053] An aluminum-zinc alloy material for new energy vehicles, characterized in that: the alloy composition of the aluminum alloy is calculated by mass fraction: the alloy composition of the aluminum alloy is calculated by mass fraction: Zn: 9.8, Cu: 1.3, Mg: 1.2, Zr: 0.5, Sn: 0.07, Si: 0.04, Fe: 0.03, Co: 0.02, La: 0.02, B: 0.005, Cr: 0.004, Ti: 0.002, the balance is aluminum and unavoidable impurities, and Zn / The Mg ratio is 8.2, other individual impurities are ≤0.005%, and the sum of impurities is ≤0.1%.

[0054] The production method of the aluminum-zinc alloy material for new energy vehicles, the specific process steps are:

[0055] (1) According to the designed aluminum alloy composition ratio, take industrial pure aluminum and pure zinc with more than 99.99% as the main raw materials respectively, set the melting temperature of pure aluminum at 680-740°C, and add an appropriate amount of More than 99.99% of pure magnesium, more than 99.99% of pure Sn, Al-5Zr%, and C...

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Abstract

The invention relates to an aluminum-zinc-serial alloy material for a new energy automobile. The aluminum-zinc-serial alloy material is characterized in that the aluminum alloy is prepared from the following alloy components in percentage by mass: 9.5-9.8% of Zn, 1.2-1.3% of Cu, 1-1.2% of Mg, 0.4-0.5% of Zr, 0.05-0.07% of Sn, 0.01-0.04% of Si, 0.02-0.03% of Fe, 0.01-0.02% of Co, 0.01-0.02% of La,0.001-0.005% of B, 0.002-0.004% of Cr, 0.001-0.002% of Ti and the balance aluminum and inevitable impurities, wherein the ratio of Zn / Mg is 8-9.2, other single impurities are smaller than or equal to0.005%, the sum of the impurities is smaller than or equal to 0.1%, the average grain sizes of aluminum alloy crystalline grains are 30-40 [mu]m, and the maximum crystalline grain size is controlled within 80 [mu]m. Through SEM and TEM observation, the area ratio of a strengthening phase Mg2Sn in the alloy is 1-1.5%, and the average dimension of the strengthening phase is 30-50 nm. A fine particlepinning boundary of AlZr3 still exists at the grain boundary, and the dimension of the boundary is 20-40 nm, the yield strength is 560-620 MPa, the tensile strength is 650-700 MPa and the ductility is 18-22%.

Description

technical field [0001] The content of the invention belongs to the field of metal materials, and specifically discloses an aluminum-zinc alloy material for new energy vehicles and a production method thereof. Background technique [0002] With the widening of the application of deformed aluminum alloys in construction, decoration, automobile, aviation, electronics and other fields, there are higher requirements for the deformed strength performance, corrosion resistance performance and oxidation coloring performance. However, at present, in the production of deformed aluminum alloys, there are still precipitates such as coarse grain structure and feather structure in melting and casting, and welding lines are easy to appear in the extrusion process, thereby increasing the cost of the mold and affecting the surface quality of the product; when the profile is thick , prone to product deformation and material composition segregation, low mechanical properties; unstable oxide fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/06B23P15/00
CPCB23P15/00C22C1/026C22C1/03C22C1/06C22C21/10
Inventor 张文久
Owner ANHUI HIGH TECH POWER TECH