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Double-phase reinforced and eutectic light-weight intermediate-entropy alloy containing lithium, aluminum, magnesium and silicon and preparation method thereof

An entropy alloy and magnesium-silicon technology, which is applied in the field of high-strength aluminum-magnesium-silicon dual-phase reinforced eutectic light medium entropy alloy and its preparation, can solve the problems of low density, poor alloy plasticity, lack of in-depth research, etc. The effect of good fluidity, excellent casting performance and good application prospects

Active Publication Date: 2019-06-18
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are also some problems, that is, although the target alloy designed has reached a certain strength, the effect of the addition of alloy elements on the alloy system has not been studied in depth, especially the effect of the addition of Si element on the properties of the alloy
As a common added alloying element, Si has the characteristics of low density, high strength and low price, and can also improve the fluidity of the alloy accordingly. The application temperature conditions of the alloy, but its excessive addition will also have a bad effect on the plasticity of the alloy
In addition, the applicant's previous patent did not pay attention to the casting performance of the alloy

Method used

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  • Double-phase reinforced and eutectic light-weight intermediate-entropy alloy containing lithium, aluminum, magnesium and silicon and preparation method thereof
  • Double-phase reinforced and eutectic light-weight intermediate-entropy alloy containing lithium, aluminum, magnesium and silicon and preparation method thereof

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Embodiment

[0018] The molecular formula of the lightweight high-strength Li-containing eutectic high-entropy alloy prepared in this example is Al 80 Mg 10 Zn 2 Cu 2 Si 5 Li 1 , the specific preparation steps are as follows: cut industrial-grade pure aluminum and Mg-20Li master alloy into small pieces, grind and remove scale with a grinder, and use high-purity (99.9) granular raw materials Mg, Zn, Cu, and Si according to the pre-calculated mass Put it on the electronic balance and weigh, the weighing error is within the scope of ±0.3%, and the total mass of raw materials is 150g. Then put the prepared raw materials into the graphite crucible one by one, evacuate to 20Pa with a mechanical pump, and then fill it with high-purity argon for protection to 0.3MPa. Then carry out induction heating, and after the alloy is melted, keep it warm for 20-30 minutes to ensure that the added alloy elements diffuse evenly, and the melting temperature is controlled at 700-850°C. Finally, the inducti...

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Abstract

The invention relates to double-phase reinforced and eutectic light-weight intermediate-entropy alloy containing lithium, aluminum, magnesium and silicon and a preparation method of the double-phase reinforced and eutectic light-weight intermediate-entropy alloy containing lithium, aluminum, magnesium and silicon, and belongs to the field of metal material preparation. The component molecule expression of the designed light-weight eutectic intermediate-entropy alloy is Al80Mg10Cu2Zn2Si5Li1. The designed alloy is double-phase reinforced and eutectic structure alloy, has the good fluidity and has the application prospects to conventional pouring and pressure casting. The alloy is molten by a vacuum induction method and poured into a steel die through the gravity, so that an alloy cast ingotis obtained. The preparation process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of metal material preparation, in particular to a lithium-containing high-strength aluminum-magnesium-silicon dual-phase enhanced eutectic light-weight medium-entropy alloy and a preparation method thereof Background technique [0002] For traditional alloys, high-entropy alloys are a new design concept and idea of ​​alloys. Based on this, the applicant has applied for an invention patent and has been authorized. The patent number: 201710946804.4. The alloy system exhibits good mechanical properties . But there are also some problems, that is, although the target alloy designed has reached a certain strength, the effect of the addition of alloy elements on the alloy system has not been studied in depth, especially the effect of the addition of Si element on the properties of the alloy . As a common added alloying element, Si has the characteristics of low density, high strength, and low price. At the same time, it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03
Inventor 张勇李亚耸李蕊轩张冰冰
Owner UNIV OF SCI & TECH BEIJING
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