High-yield-strength aluminum alloy and preparation method thereof

An aluminum alloy, high-yield technology, applied in the field of aluminum alloy materials, can solve the problem of low yield strength, and achieve the effects of increasing yield strength, refining internal grains, and reducing linear shrinkage.

Pending Publication Date: 2022-08-05
CHONGQING YUJIANG DIE CASTING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention intends to provide an aluminum alloy with high yield strength to solve the technical problem of low yield strength of existing aluminum alloy materials

Method used

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  • High-yield-strength aluminum alloy and preparation method thereof
  • High-yield-strength aluminum alloy and preparation method thereof
  • High-yield-strength aluminum alloy and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0028] Table 1 shows the differences in aluminum alloy raw materials and contents between Examples 1 to 5 and Comparative Examples 1 to 3. Taking Example 1 as an example, the raw material composition and preparation process of a high yield strength aluminum alloy are described.

[0029] Example 1

[0030] A high yield strength aluminum alloy, comprising raw materials with the following mass fractions: silicon (Si) 9.5-12%, manganese (Mn) 0.5-0.8%, magnesium (Mg) 0.1-0.6%, iron (Fe) ≤ 0.15%, Titanium (Ti)≤0.12%, strontium (Sr) 0.02-0.04%, lanthanum-cerium (La-Ce) mixture 0.1-0.2% (the ratio of lanthanum-cerium is lanthanum:cerium=7:3), the balance is aluminum and unavoidable The total amount of impurities is less than or equal to 0.1%, including raw materials with the following mass fractions: two or more of copper, zinc and calcium, and the content of each element in the impurities is less than or equal to 0.03%.

[0031] The composition and percentage content of each elemen...

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Abstract

The invention relates to the technical field of aluminum alloy materials, and discloses a high-yield-strength aluminum alloy and a preparation method thereof.The high-yield-strength aluminum alloy comprises, by mass, 9.5%-12% of silicon, 0.5%-0.8% of manganese, 0.1%-0.6% of magnesium, smaller than or equal to 0.15% of iron, smaller than or equal to 0.12% of titanium, 0.02%-0.04% of strontium, 0.1%-0.2% of lanthanum-cerium mixture (the ratio of lanthanum to cerium is 7: 3) and the balance aluminum and inevitable impurities, and the total amount of the impurities is smaller than or equal to 0.1%. According to the scheme, by increasing the silicon content, the wear resistance of the aluminum alloy is improved while the hardness of the aluminum alloy is guaranteed; and meanwhile, different types of rare earth elements are added, alloy components and structures are optimized, harmful impurity elements are purified through the rare earth, grains are refined, the purpose of refined grain strengthening is achieved, and therefore the yield strength and wear resistance of the aluminum alloy are improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a high yield strength aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy has the characteristics of low density, high specific strength and specific stiffness, good corrosion resistance, excellent electrical and thermal conductivity, easy recycling, and good low temperature performance. It is widely used in transportation, aerospace, electronic appliances and other fields. With the increasingly fierce competition in the automotive market, aluminum alloys have low density, high strength, especially some even surpass high-quality steel, good plasticity, and can be processed into various types of materials. Corrosion and other characteristics make aluminum alloy parts one of the commonly used materials for automobiles. For example, due to the low yield strength of the existing gearbox piston, in the actual forming process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02B22D17/00C22C1/02C22C1/06
CPCC22C21/02C22C1/02C22C1/06B22D17/00
Inventor 董克华高仲明周志明解洪权杨会唐小刚杨德志杨浩坤涂坚王军军黄灿
Owner CHONGQING YUJIANG DIE CASTING
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