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CrFeCoNiNbx high-entropy alloy and preparation method thereof

A high-entropy alloy and master alloy ingot casting technology is applied in the field of material metal materials and their preparation, and can solve the problems of good combination of strength and plasticity of high-entropy alloys.

Active Publication Date: 2015-06-03
东莞市三航军民融合创新研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The AlCoCrFeNiCuC high-entropy alloy in the patent has good corrosion resistance, but it still does not solve the problem of good combination of strength and plasticity in high-entropy alloys

Method used

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  • CrFeCoNiNbx high-entropy alloy and preparation method thereof
  • CrFeCoNiNbx high-entropy alloy and preparation method thereof
  • CrFeCoNiNbx high-entropy alloy and preparation method thereof

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Experimental program
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Embodiment 1

[0022] This embodiment is a CrFeCoNiNbx high-entropy alloy composed of Cr, Fe, Co, Ni and Nb; wherein x=0.1-0.8. In this embodiment, the content of Nb is 2.4%, and the content of Cr, Fe, Co and Ni are the same. The content of Cr, Fe, Co and Ni is about 24.4%; x=0.1.

[0023] The ratios are molar percentages.

[0024] The Cr, Fe, Co, Ni and Nb are solid pure raw materials with a purity not lower than 99.9% by weight.

[0025] The preparation method of described CrFeCoNiNbx high-entropy alloy is:

[0026] Step 1: batching, the experiment uses Cr, Fe, Co, Ni and Nb raw materials with a purity of not less than 99.9%wt%: Cr, Fe, Co, Ni and Nb. Use mechanical methods to remove the oxide skin on the surface of Cr, Fe, Co, Ni and Nb, and use industrial absolute alcohol to ultrasonically clean the Cr, Fe, Co, Ni and Nb raw materials; accurately weigh according to the mole percentage of CrFeCoNiNb0.1 high-entropy alloy Cr, Fe, Co, Ni and Nb raw materials; the sum of the weighed Cr, Fe...

Embodiment 2

[0031] This embodiment is a CrFeCoNiNbx high-entropy alloy composed of Cr, Fe, Co, Ni and Nb; wherein x=0.1-0.8. In this embodiment, the content of Nb is 5.9%, and the content of Cr, Fe, Co and Ni is the same. The content of Cr, Fe, Co and Ni is about 23.5%; x=0.25.

[0032] The ratios are molar percentages.

[0033] The Cr, Fe, Co, Ni and Nb are solid pure raw materials with a purity not lower than 99.9% by weight.

[0034] The preparation method of described CrFeCoNiNbx high-entropy alloy is:

[0035] Step 1: batching, using Cr, Fe, Co, Ni and Nb raw materials with a purity not lower than 99.9%wt%. Use mechanical methods to remove the scales on the surface of Cr, Fe, Co, Ni and Nb, and use industrial anhydrous ethanol to ultrasonically clean the metal; accurately weigh the above-mentioned Cr, Fe, Co, Ni and Nb raw materials, the sum of the mass of each raw material is 40g; Cr is 8.36g, Fe is 8.98g, Co is 9.48g, Ni is 9.44g, and Nb is 3.74g. After mixing, a mixture of Cr...

Embodiment 3

[0040] This embodiment is a CrFeCoNiNbx high-entropy alloy composed of Cr, Fe, Co, Ni and Nb; wherein x=0.1-0.8. In this embodiment, the content of Nb is 11.1%, and the contents of Cr, Fe, Co and Ni are the same. The content of Cr, Fe, Co and Ni is about 22.2%; x=0.5.

[0041] The ratios are molar percentages.

[0042] The Cr, Fe, Co, Ni and Nb are solid pure raw materials with a purity not lower than 99.9% by weight.

[0043] The preparation method of described CrFeCoNiNbx high-entropy alloy is:

[0044] Step 1: batching, the experiment uses pure metal raw materials with a purity not lower than 99.9%wt%: Cr, Fe, Co, Ni and Nb. Use mechanical methods to remove the scales on the surface of Cr, Fe, Co, Ni and Nb, and use industrial anhydrous ethanol to ultrasonically clean the metal; accurately weigh the mass of the above pure metal raw materials according to the molar percentage of CrFeCoNiNb0.5 high-entropy alloy, and the weighed The total mass of Cr, Fe, Co, Ni and Nb raw...

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Abstract

The invention discloses a CrFeCoNiNbx high-entropy alloy and a preparation method thereof. The CrFeCoNiNbx high-entropy alloy comprises Cr, Fe, Co, Ni and Nb, wherein x ranges from 0.1 to 0.8; the content of Nb is 2.4%-16.7%; Cr, Fe, Co, and Ni are equal in content; and the proportion is mole percentage. An Nb element is added to a Cr-Fe-Co-Ni quaternary alloy, a precipitated phase is formed in single FCC (face-centered cubic) solid solution phase, precipitation strengthening is performed, and the high-entropy alloy has a face-centered cubic structure, high hardness, high strength, good compression plasticity and better mechanical properties.

Description

technical field [0001] The invention provides a CrFeCoNiNbx high-entropy alloy and a preparation method thereof, which belong to the field of material metal materials and their preparation. Background technique [0002] High-entropy alloys are new types of alloys that have emerged in recent years. Design Concepts and Outcomes, Advanced Engineering Materials, 6(2004) 299-303] High-entropy alloys are alloy materials obtained by alloying at least 4 elements in equiatomic ratios or approximately equiatomic ratios. High-entropy alloys have characteristics that traditional alloys do not have, such as high-entropy effects, severe lattice distortion, and hysteretic diffusion effects. These characteristics make high-entropy alloys have the advantages of high strength, high hardness, high thermal resistance, good corrosion resistance, creep resistance and wear resistance, so they can be used in some special working environments (such as aviation, aerospace, energy and other fields) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/03
Inventor 何峰王志军李俊杰王锦程
Owner 东莞市三航军民融合创新研究院
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