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High-entropy alloy with aluminum and silicon being added and preparation method of high-entropy alloy

A technology of high-entropy alloy and silicon element, which is applied in the field of alloy materials, can solve the problem that the wear resistance has not been significantly improved, and achieve the effect of improving wear resistance

Inactive Publication Date: 2019-02-19
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its wear resistance has not been significantly improved. Therefore, how to prepare high-entropy alloys through vacuum electric arc furnaces to improve the wear resistance of products is a very meaningful topic.

Method used

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  • High-entropy alloy with aluminum and silicon being added and preparation method of high-entropy alloy
  • High-entropy alloy with aluminum and silicon being added and preparation method of high-entropy alloy
  • High-entropy alloy with aluminum and silicon being added and preparation method of high-entropy alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Use an electronic balance to accurately weigh Co, Cr, Ni, Al, Fe, Si elemental metals with a purity higher than 99.9%, and prepare raw materials according to the mole fraction AlxCoCrFeNiSi (x=0.5); AlxCoCrFeNiSi (x=0.5) It is formulated according to the molar ratio of atoms; the metal element needs to remove the surface oxide scale before weighing.

[0029] (2) Place the raw materials prepared in step (1) in a vacuum water-cooled copper mold, and carry out vacuum smelting 5 times, each time for 8 minutes; Ar is used as a protective gas; As for the top, the metal with a high melting point is as for the bottom; a round high-entropy alloy ingot is obtained; the vacuum degree of vacuum melting is 10 -4 Pa;

[0030] (3) The circular high-entropy alloy ingot of step (2) is left standing in the air in an evaporating dish for 60h to eliminate partial stress and reduce material brittleness.

[0031] Aluminum and silicon elements promote the formation of body-centered cubi...

Embodiment 2

[0033] (1) Use an electronic balance to accurately weigh Co, Cr, Ni, Al, Fe, Si elemental metals with a purity higher than 99.9%, and prepare raw materials according to the mole fraction AlxCoCrFeNiSi (x=1.0); AlxCoCrFeNiSi (x=1.0) It is formulated according to the molar ratio of atoms, and the metal element needs to remove the surface oxide scale before weighing.

[0034] (2) Place the raw materials prepared in step (1) in a vacuum water-cooled copper mold, and carry out vacuum smelting 5 times, each time for 8 minutes; Ar is used as a protective gas; As for the top, the metal with a high melting point is below; the circular high-entropy alloy ingot is obtained; the vacuum degree of the vacuum smelting is 10 -4 Pa;

[0035] (3) The circular high-entropy alloy ingot of step (2) is left standing in the air in an evaporating dish for 60h to eliminate partial stress and reduce material brittleness.

[0036] Aluminum and silicon elements promote the formation of body-centered cu...

Embodiment 3

[0038] (1) Use an electronic balance to accurately weigh Co, Cr, Ni, Al, Fe, Si elemental metals with a purity higher than 99.9%, and prepare raw materials according to the mole fraction AlxCoCrFeNiSi (x=1.5); AlxCoCrFeNiSi (x=1.5) It is formulated according to the molar ratio of atoms, and the metal element needs to remove the surface oxide scale before weighing.

[0039] (2) Place the raw materials prepared in step (1) in a vacuum water-cooled copper mold, and carry out vacuum smelting 5 times, each time for 8 minutes; Ar is used as a protective gas; As for the top, the metal with a high melting point is below; the circular high-entropy alloy ingot is obtained; the vacuum degree of the vacuum smelting is 10 -4 Pa;

[0040] (3) The circular high-entropy alloy ingot of step (2) is left standing in the air in an evaporating dish for 60h to eliminate partial stress and reduce material brittleness.

[0041] Aluminum and silicon elements promote the formation of body-centered cu...

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Abstract

The invention belongs to the field of alloy materials and particularly relates to high-entropy alloy with aluminum and silicon being added. After elementary substance metals, namely Co, Cr, Ni, the Al, Fe and the Si, with the purities being higher than 99.9% are compounded according to the ratios of AlxCoCrFeNiSi, wherein x is equal to 0.5, 1, 1.5 and 2.0, the high-entropy alloy is obtained through vacuum arc. According to the high-entropy alloy with the aluminum and the silicon being added and the preparation method of the high-entropy alloy, formation of a body center cubic phase in an AlCoCrFeNi system is promoted through the aluminum and the silicon, and thus, wear resistance of the high-entropy alloy is improved.

Description

technical field [0001] The invention belongs to the field of alloy materials, and in particular relates to a high-entropy alloy added with aluminum and silicon elements and a preparation method thereof. Background technique [0002] High-entropy alloy is an alloy containing at least 5 to 13 kinds of atoms and a mass fraction of 5% to 35%, so it is also called multi-principal alloy. High-entropy alloy has many characteristics: high strength and hardness, good wear resistance , excellent heat and corrosion resistance, and certain magnetic properties. Its excellent mechanical properties are mainly due to its strengthening mechanisms such as solid solution strengthening, grain boundary strengthening, and second phase strengthening. However, as the hardness increases, the processing properties such as plasticity and toughness of the alloy are also weakened, so it is not suitable for rolling. Or machining, mainly suitable for the preparation of wear-resistant, corrosion-resistant...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C1/02C22C30/00
Inventor 张楠楠金冰倩张悦张欣宇马永亮郝德喜李德元
Owner SHENYANG POLYTECHNIC UNIV