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Aluminum alloy and preparation method and application thereof

An aluminum alloy and alloy technology, applied in the field of alloys, can solve the problems of low strength and plasticity, and achieve the effects of improving strength and plasticity, reducing oxidation, and refining grains

Active Publication Date: 2021-11-16
FOSHAN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing aluminum alloys, such as Z1101 alloys containing Si6.5-7.5%, Mg0.25-0.45%, Mn<0.08%, Fe<0.20%, Ti0.08-0.2%, although casting fluidity is good, but it is common The problem of low strength and plasticity is generally formed by liquid die forging. The tensile strength is 300-320MPa, the yield strength is 240-260MPa, and the elongation is 6-9%.

Method used

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  • Aluminum alloy and preparation method and application thereof
  • Aluminum alloy and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] An aluminum alloy, comprising the following components by mass percentage: Si4%, Mg1%, Gd0.03%, Sr0.008%, Mn0.05%, Fe0.1%, Ti0.2%, Be0.08%, the balance It is aluminum and impurity elements; wherein, the content of a single impurity element is less than 0.05%, and the total content of impurity elements is less than 0.15%.

[0030] The preparation method of the above-mentioned aluminum alloy comprises the following steps:

[0031] 1) According to the composition mass percentage of aluminum alloy, 99.85% aluminum ingot, 99.9% magnesium ingot, 99.89% instant silicon, Al10Be, Al5Mn, Al5Ti1B, Al5Gd, Al5Sr alloy are used as raw materials for batching;

[0032] 2) Heat and melt aluminum ingot at 740°C, then add 4% instant silicon, 1% magnesium ingot, 0.8% Al10Be alloy, 0.1% Al5Mn alloy, 0.6% Al5Gd alloy, 0.16% Al5Sr, which account for the total weight of raw materials Alloy, 4% Al5Ti1B alloy, stirred and melted into alloy melt;

[0033] 3) Degassing with argon rotary blowing,...

Embodiment 2

[0037] An aluminum alloy, comprising the following components by mass percentage: Si5%, Mg0.7%, Gd0.05%, Sr0.009%, Mn0.07%, Fe0.14%, Ti0.1%, Be0.04%, The balance is aluminum and impurity elements; wherein, the content of a single impurity element is less than 0.05%, and the total content of impurity elements is less than 0.15%.

[0038]The preparation method of the above-mentioned aluminum alloy comprises the following steps:

[0039] 1) According to the composition mass percentage of aluminum alloy, 99.85% aluminum ingot, 99.9% magnesium ingot, 99.89% instant silicon, Al10Be, Al5Mn, Al5Ti1B, Al5Gd, Al5Sr alloy are used as raw materials for batching;

[0040] 2) Heat and melt the aluminum ingot at 710°C, and then add 5% instant silicon, 0.7% magnesium ingot, 0.4% Al10Be alloy, 1.4% Al5Mn alloy, 1% Al5Gd alloy, 0.18% Al5Sr, which account for the total weight of raw materials Alloy, 2% Al5Ti1B alloy, stirred and melted into alloy melt;

[0041] 3) Degassing with argon rotary b...

Embodiment 3

[0045] An aluminum alloy, comprising the following components in mass percentage: Si5%, Mg0.75%, Gd0.04%, 0.008% Sr, Mn0.06%, Fe0.12%, Ti0.15%, Be0.06%, and The amount is aluminum and impurity elements; wherein, the content of a single impurity element is less than 0.05%, and the total content of impurity elements is less than 0.15%.

[0046] The preparation method of the above-mentioned aluminum alloy comprises the following steps:

[0047] 1) According to the composition mass percentage of aluminum alloy, 99.85% aluminum ingot, 99.9% magnesium ingot, 99.89% instant silicon, Al10Be, Al5Mn, Al5Ti1B, Al5Gd, Al5Sr alloy are used as raw materials for batching;

[0048] 2) Heat and melt the aluminum ingot at 720°C, and then add 5% instant silicon, 0.75% magnesium ingot, 0.6% Al10Be alloy, 1.2% Al5Mn alloy, 0.8% Al5Gd alloy, 0.16% Al5Sr, which account for the total weight of raw materials Alloy, 3% Al5Ti1B alloy, stirred and melted into alloy melt;

[0049] 3) Degassing with argo...

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Abstract

The invention relates to the technical field of alloys, and discloses an aluminum alloy and a preparation method and application thereof. The aluminum alloy is prepared from, by mass, 4-5% of Si, 0.7-1% of Mg, 0.03-0.05% of Gd, 0.006-0.009% of Sr, less than 0.08% of Mn, less than 0.15% of Fe, 0.08-0.2% of Ti, 0.01-0.08% of Be and the balance of aluminum and impurity elements. The aluminum alloy contains all elements with specific contents, the strength and plasticity of the liquid die forging aluminum alloy can be improved, the tensile strength of the aluminum alloy is larger than 350MPa, and the elongation of the aluminum alloy is larger than 9%. According to the aluminum alloy, through melting, refining, liquid die forging, solid solution treatment and aging treatment, oxidation of alloy melt is reduced, alloy grains are refined, meanwhile, eutectic silicon and impurity aluminum-iron-silicon phases are subjected to modification treatment, finally, a refining technology is adopted for degassing and deslagging, and the strength and plasticity of the aluminum alloy are improved.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an aluminum alloy and its preparation method and application. Background technique [0002] The content of aluminum in the earth's crust is second only to oxygen and silicon, ranking third, and is the most abundant metal element in the earth's crust, so it is widely used in the development of the three important industries of aviation, construction, and automobiles. In the automotive industry, aluminum alloy wheels, steering wheels, suspension brackets, steering knuckles, control arms, etc., can all be made of aluminum alloy to achieve the purpose of lightweight vehicles. Based on safety considerations, higher comprehensive mechanical performance requirements are put forward for the use of aluminum alloy parts, and aluminum alloys are required to have higher strength and plasticity. Existing aluminum alloys, such as Z1101 alloys containing Si6.5-7.5%, Mg0.25-0.45%, Mn<0.08%, F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/043B22D18/02
CPCC22C21/02C22C1/026C22C1/03C22F1/043B22D18/02
Inventor 胡中潮高忠玉陈湖演蔡健文李达鑫梁宇森李迪滔
Owner FOSHAN POLYTECHNIC