Graphene and rare earth scandium synergistically enhanced Al-Si-Mg cast aluminum alloy and preparation method thereof

A technology for casting aluminum alloy and graphene, applied in the field of casting aluminum alloy, can solve the problems of low density of parts, poor material properties, easy segregation, etc., to improve the plasticity of the alloy, improve the utilization rate of the alloy, and achieve mild conditions. Effect

Active Publication Date: 2019-01-04
广州埃烯金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of powder metallurgy is high, the cycle is long, the density of the prepared parts is not high, and there are internal defects, which leads to the phenomenon of poor material performance, and often requires secondary processing
The casting method is relatively simple, low in cost, and can be mass-produced, but segregation is prone to occur during the casting process, and it is easy to introduce gas to form pores during the non-vacuum shock stirring casting process, and it is urgent to control the harmful interface reaction between graphene and aluminum

Method used

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  • Graphene and rare earth scandium synergistically enhanced Al-Si-Mg cast aluminum alloy and preparation method thereof
  • Graphene and rare earth scandium synergistically enhanced Al-Si-Mg cast aluminum alloy and preparation method thereof
  • Graphene and rare earth scandium synergistically enhanced Al-Si-Mg cast aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A graphene rare earth scandium synergistically reinforced Al-Si-Mg cast aluminum alloy, wherein the weight percentage of each raw material is: Sc 0.54wt.%, graphene 0.003wt.%, Si 6.90wt.%, Mg 0.40wt.%, Li 0.02wt.%, Be0.02wt.%, B 0.02wt.%, Na 0.02wt.%, P 0.02wt.%, Ti 0.03wt.%, V 0.03wt.%, Cr0.02wt.%, Mn 0.03 wt.%, Fe 0.02wt.%, Ni 0.03wt.%, Cu 0.02wt.%, Zn 0.02wt.%, Zr0.03wt.%, Sn 0.02wt.%, Pb 0.03wt.%, other unspecified Other impurity elements: ≤0.01wt.% for each type, ≤0.10wt.% in total, and the balance is Al.

[0053] The specific preparation method is as follows:

[0054] (1) Take each component raw material according to the alloy proportion, and the total mass is 75 grams;

[0055] (2) Put the weighed raw material into the smelting furnace, vacuum and wash it, fill it with high-purity argon to 500Pa as a protective gas, and heat up to 605°C to melt the raw material;

[0056] (3) After the alloy is melted, heat up to make the alloy homogenize at 720°C for 5 minutes...

Embodiment 2

[0061] A graphene rare earth scandium synergistically reinforced Al-Si-Mg cast aluminum alloy, wherein the weight percentage of each raw material is: Sc 0.54wt.%, graphene 0.003wt.%, Si 6.90wt.%, Mg 0.40wt.%, Li 0.02wt.%, Be0.02wt.%, B 0.02wt.%, Na 0.02wt.%, P 0.02wt.%, Ti 0.03wt.%, V 0.03wt.%, Cr0.02wt.%, Mn 0.03 wt.%, Fe 0.02wt.%, Ni 0.03wt.%, Cu 0.02wt.%, Zn 0.02wt.%, Zr0.03wt.%, Sn 0.02wt.%, Pb 0.03wt.%, other unspecified Other impurity elements: ≤0.01wt.% for each type, ≤0.10wt.% in total, and the balance is Al.

[0062] The specific preparation method is as follows:

[0063] (1) Take each component raw material according to the alloy proportion, and the total mass is 75 grams;

[0064] (2) Put the weighed raw material into the smelting furnace, vacuum and wash it, fill it with high-purity argon to 500Pa as a protective gas, and heat up to 605°C to melt the raw material;

[0065] (3) After the alloy is melted, heat up to make the alloy homogenize at 720°C for 5 minutes...

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Abstract

The invention relates to graphene and rare earth scandium synergistically enhanced Al-Si-Mg cast aluminum alloy and a preparation method thereof. The aluminum alloy comprises the following componentsas raw materials in percent by mass: 6.00-8.00% of Si, 0.20-0.45% of Mg, 0.003-0.007% of graphene, 0.50-0.60% of Sc, smaller than or equal to 0.05% of Li, smaller than or equal to 0.05% of Be, smallerthan or equal to 0.05% of B, smaller than or equal to 0.05% of Na, smaller than or equal to 0.05% of P, smaller than or equal to 0.10% of Ti, smaller than or equal to 0.10% of V, smaller than or equal to 0.05% of Cr, smaller than or equal to 0.10% of Mn, smaller than or equal to 0.10% of Fe, smaller than or equal to 0.05% of Ni, smaller than or equal to 0.10% of Cu, smaller than or equal to 0.10%of Zn, smaller than or equal to 0.05% of Zr, smaller than or equal to 0.05% of Sn, smaller than or equal to 0.10% of Pb and the balance of Al. The mechanical properties and the plasticity of the alloy are improved, and the application range of the aluminum alloy in the industrial fields of automobiles, buildings and the like is expanded.

Description

technical field [0001] The invention belongs to the technical field of cast aluminum alloys, in particular to a graphene rare earth scandium synergistically reinforced Al-Si-Mg cast aluminum alloy and a preparation method thereof. Background technique [0002] Al-Si-Mg-based lightweight metal structural materials are widely used due to their low density, good casting fluidity, strong plasticity, high tensile and compressive properties, fast heat dissipation, and good corrosion resistance. In important fields such as automotive, aerospace and machine building. [0003] Si is the main alloying element in Al-Si-Mg based casting alloys. Due to the large latent heat of crystallization of Si, Si mainly exists in the form of eutectic (Si) in the alloy, which can significantly improve the casting fluidity, hot cracking tendency and air tightness of the alloy, and greatly improve the casting performance of the alloy. In addition, Si has higher chemical stability and hardness, so Al...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/10C22C1/02
CPCC22C1/1036C22C21/02
Inventor 刘玺张敏罗红斌吴素芹范国强
Owner 广州埃烯金属科技有限公司
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