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Light high-strength anti-corrosive high-entropy alloy and preparation method thereof

A high-entropy alloy, light-weight technology, applied in the field of alloys, can solve the problems of high-entropy alloys such as large specificity, and achieve the effects of high energy consumption, simple operation, and simple equipment

Active Publication Date: 2020-01-21
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of large proportion of existing high-entropy alloys, the present invention provides a light-weight high-entropy alloy. The high-entropy alloy has the advantages of low cost, low density, high compressive strength and excellent corrosion resistance, and is suitable for aviation Aerospace, transportation and other fields

Method used

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  • Light high-strength anti-corrosive high-entropy alloy and preparation method thereof
  • Light high-strength anti-corrosive high-entropy alloy and preparation method thereof
  • Light high-strength anti-corrosive high-entropy alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] In this example, the lightweight high-entropy alloy is Al 35 Mg 15 Zn 30 Cu 5 Si 15 , using bulk Al, Mg, Zn, Cu and Al-Si master alloys with a purity greater than 99.9% as raw materials, sanding the surface of the bulk raw materials with sandpaper, removing surface oxides, ultrasonic cleaning in alcohol, and drying for later use;

[0033] According to the molar ratio of Al element, Mg element, Zn element, Cu element and Si element being 7:3:6:1:3, the pretreated block raw material is weighed, and the raw material is prepared. When the raw material is prepared according to the molar ratio, Mg is more Add 10%, the reason is that Mg is easy to burn;

[0034] Configure a release agent with sodium silicate, zinc oxide and water at a mass ratio of 1:3:6, and apply the release agent to the surface of the graphite crucible and stainless steel mold, and put it in a blast drying oven to dry for more than 30 minutes for later use;

[0035] Put the configured Zn, Al, Al-Si mas...

Embodiment 2

[0040] In this example, the lightweight high-entropy alloy is Al 35 Mg 20 Zn 30 Cu 5 Si 10 , using bulk Al, Mg, Zn, Cu and Al-Si master alloys with a purity greater than 99.9% as raw materials, sanding the surface of the bulk raw materials with sandpaper, removing surface oxides, ultrasonic cleaning in alcohol, and drying for later use;

[0041] According to the molar ratio of Al element, Mg element, Zn element, Cu element and Si element as 7:4:6:1:2, the pretreated block raw material is weighed, and the raw material is prepared. When the raw material is prepared according to the molar ratio, Mg is more Add 10%, the reason is that Mg is easy to burn;

[0042] Configure a release agent with sodium silicate, zinc oxide and water at a mass ratio of 1:3:6, and apply the release agent to the surface of the graphite crucible and stainless steel mold, and put it in a blast drying oven to dry for more than 30 minutes for later use;

[0043] Put the configured Zn, Al, Al-Si master...

Embodiment 3

[0047] In this example, the lightweight high-entropy alloy is Al 35 Mg 25 Zn 30 Cu 5 Si 5 , using bulk Al, Mg, Zn, Cu and Al-Si master alloys with a purity greater than 99.9% as raw materials, sanding the surface of the bulk raw materials with sandpaper, removing surface oxides, ultrasonic cleaning in alcohol, and drying for later use;

[0048] According to the molar ratio of Al element, Mg element, Zn element, Cu element and Si element being 7:5:6:1:1, the pretreated block raw material is weighed, and the raw material is prepared. When the raw material is prepared according to the molar ratio, Mg is more Add 10%, the reason is that Mg is easy to burn;

[0049] Configure a release agent with sodium silicate, zinc oxide and water at a mass ratio of 1:3:6, and apply the release agent to the surface of the graphite crucible and stainless steel mold, and put it in a blast drying oven to dry for more than 30 minutes for later use;

[0050] Put the configured Zn, Al, Al-Si mast...

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Abstract

The invention discloses a light high-strength anti-corrosive high-entropy alloy and a preparation method thereof. The chemical components of the alloy comprise 34%-36% of Al, 15%-25% of Mg, 29%-31% ofZn, 4%-6% of Cu and 5%-15% of Si by atomic percentage. According to the light high-strength anti-corrosive high-entropy alloy, a traditional resistance furnace is used for conducting smelting under an argon shielding protection atmosphere; the elements prone to burning loss among part of elements and the other elements are subjected to smelting through intermediate alloy addition at different temperatures; at the last remelting and cooling step, the alloy is subjected to air-cooling for 10-15 s and then subjected to water-cooling, and a big-size light high-entropy alloy ingot is prepared successfully. The high-entropy alloy prepared through the method has the small atomic size difference delta, the mixed entropy delta Hmix is near zero, and the simple crystal structure can be formed. Meanwhile, the alloy has the advantages of low cost, small density, high strength and strong corrosion resistance. The preparation method designed by the invention is easy to implement, energy consumptionis low, the burning loss rate is low, and large-scale industrial production can be realized.

Description

technical field [0001] The invention relates to an alloy, in particular to a light-weight, high-strength, corrosion-resistant high-entropy alloy and a preparation method thereof. Background technique [0002] Taiwanese scholar Ye Junwei first proposed a new alloy design idea in 2004, and prepared a "multi-principal high-entropy alloy" that is different from traditional alloys. A high-entropy alloy is a mixture of 5 or more (generally no more than 13) metals in equimolar ratio or nearly equimolar ratio, and the atomic percentage of each component is not less than 5% and not more than 35 %, no distinction between primary and secondary elements. High-entropy alloys have a simple microstructure and excellent properties unmatched by traditional alloys, such as high strength, high hardness, high wear resistance and corrosion resistance, etc., and have great development and use value. [0003] Elements such as Al, Fe, Co, Cr, Ti, Cu, Ni, V, and Mn were used to prepare high-entrop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/06C22C30/02C22C1/03
CPCC22C1/026C22C1/03C22C21/10C22C30/02C22C30/06
Inventor 马爱斌季承维江静华宋丹陈建清
Owner HOHAI UNIV