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A kind of high-strength and high-toughness layered heterogeneous medium-entropy alloy and preparation method thereof

A technology of entropy alloys and high-toughness layers, applied in the field of high-strength and high-toughness layered heterogeneous medium-entropy alloys and their preparation, can solve the problems of inability to fully tap the potential of medium-entropy alloys, restrict development and application, and mismatch strength-plastic properties, etc. problems, to achieve the effect of high engineering application prospects, strong repeatability, and reasonable and simple preparation process

Active Publication Date: 2022-04-22
威海蓝谷材料分析研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, as a new type of alloy derived from the concept of high-entropy alloys, medium-entropy alloys show a mismatch of strength-plastic properties. its development and application
At present, various strengthening methods have been applied in the study of the strengthening and toughening of medium-entropy alloys, such as solid solution strengthening, fine-grain strengthening, precipitation strengthening, heterogeneous strengthening, etc. However, a single strengthening method still cannot fully tap the potential of medium-entropy alloys. Technical issues need to be resolved

Method used

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  • A kind of high-strength and high-toughness layered heterogeneous medium-entropy alloy and preparation method thereof
  • A kind of high-strength and high-toughness layered heterogeneous medium-entropy alloy and preparation method thereof
  • A kind of high-strength and high-toughness layered heterogeneous medium-entropy alloy and preparation method thereof

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Effect test

Embodiment 1

[0031] The application provides a high-strength and high-toughness layered heterogeneous medium-entropy alloy, the chemical formula of which is (Ni 2 CrCo) 95 Nb 5 , abbreviated as Nb5 alloy, in which the ratio of each element is listed as a mole percentage. The preparation process is as follows:

[0032] (1) Ingredients: Accurately weigh Ni, Cr, Co, and Nb elemental metal raw materials according to the nominal composition of the medium-entropy alloy, and the total weight of the raw materials is 20kg, and set aside.

[0033] (2) Smelting: Put Ni, Cr, and Co elemental metal raw materials in a vacuum induction melting furnace, heat until melted and keep warm for 15 minutes, then add Nb elemental metal raw materials, heat until melted and keep warm for 10 minutes, and then pour it into a steel mold Cool to obtain a medium entropy alloy ingot.

[0034] (3) Homogenization treatment: The obtained medium-entropy alloy ingot was subjected to high-temperature homogenization treatme...

Embodiment 2

[0039] The application provides a high-strength and high-toughness layered heterogeneous medium-entropy alloy, the chemical formula of which is (Ni 2 CrCo) 96 Nb 4 , abbreviated as Nb4 alloy, in which the ratio of each element is listed as a mole percentage. The preparation process is as follows:

[0040] (1) Ingredients: Accurately weigh Ni, Cr, Co, and Nb elemental metal raw materials according to the nominal composition of the medium-entropy alloy, and the total weight of the raw materials is 20kg, and set aside.

[0041] (2) Smelting: Put Ni, Cr, and Co elemental metal raw materials in a vacuum induction melting furnace, heat until melted and keep warm for 15 minutes, then add Nb elemental metal raw materials, heat until melted and keep warm for 10 minutes, and then pour it into a steel mold Cool to obtain a medium entropy alloy ingot.

[0042] (3) Homogenization treatment: The obtained medium-entropy alloy ingot was subjected to high-temperature homogenization treatme...

Embodiment 3

[0047] The application provides a high-strength and high-toughness layered heterogeneous medium-entropy alloy, the chemical formula of which is (Ni 2 CrCo) 96 Nb 4 , abbreviated as Nb4 alloy, in which the ratio of each element is listed as a mole percentage. The preparation process is as follows:

[0048] (1) Ingredients: Accurately weigh Ni, Cr, Co, and Nb elemental metal raw materials according to the nominal composition of the medium-entropy alloy, and the total weight of the raw materials is 20kg, and set aside.

[0049] (2) Smelting: Put Ni, Cr, and Co elemental metal raw materials in a vacuum induction melting furnace, heat until melted and keep warm for 15 minutes, then add Nb elemental metal raw materials, heat until melted and keep warm for 10 minutes, and then pour it into a steel mold Cool to obtain a medium entropy alloy ingot.

[0050] (3) Homogenization treatment: The obtained medium-entropy alloy ingot was subjected to high-temperature homogenization treatme...

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Abstract

The invention provides a high-strength and high-toughness layered heterogeneous medium-entropy alloy and a preparation method thereof, which solves the technical problem that the existing medium-entropy alloy shows a mismatch of strength-plastic properties, and the main elements contained in it are Ni, Cr , Co, Nb, the composition of the medium entropy alloy is (Ni 2 CrCo) 100‑x Nb x , wherein the molar ratio of Ni, Cr, and Co elements is 2:1:1, and the atomic percentage of Nb elements is 2≤x≤5at.%. The invention also discloses a preparation method of a high-strength and high-toughness layered heterogeneous medium-entropy alloy , which includes four steps of batching, smelting, liquid nitrogen rolling, and heat treatment, and can be widely used in the field of metal materials and their preparation.

Description

technical field [0001] The application belongs to the field of metal materials and their preparation, and specifically relates to a high-strength, high-toughness layered heterogeneous medium-entropy alloy and a preparation method thereof. Background technique [0002] As we all know, the rapid development of science and technology in modern society has higher and higher performance requirements for materials, and traditional alloy design has been difficult to meet the requirements. The emergence of high and medium entropy alloy design concepts provides an effective way to design high-performance metal materials. The unique properties of high and medium entropy alloys, such as high constituent entropy, large lattice distortion and slow diffusion effect, make them exhibit a series of excellent properties different from traditional alloys, such as high hardness, high wear resistance, Corrosion performance and good radiation resistance, excellent low temperature performance, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/00
CPCC22C30/00C22C1/02C22F1/00
Inventor 杨延清陆文杰董清轩
Owner 威海蓝谷材料分析研究院有限公司