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Method for improving magnetic property of high-entropy alloy by heat treatment through constant magnetic field

A technology for high-entropy alloys and magnetic properties, applied in the field of heat treatment of high-entropy alloys to improve the magnetic properties of high-entropy alloys by using constant magnetic field heat treatment, can solve the problem of limited improvement in the magnetic properties of high-entropy alloy materials and unfavorable promotion of high-entropy alloy materials Application, high heat treatment temperature, etc., to achieve the effect of significantly improving the magnetic properties, improving the magnetic properties of the alloy, and reducing the process cost

Active Publication Date: 2018-03-30
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The heat treatment temperature of existing high-entropy alloys is usually high, which wastes energy and has limited effect on improving the magnetic properties of high-entropy alloy materials
In order to improve the magnetic properties of the alloy, it is necessary to change the alloy composition, which sometimes sacrifices other properties of the high-entropy alloy material, which is not conducive to the popularization and application of the high-entropy alloy material

Method used

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  • Method for improving magnetic property of high-entropy alloy by heat treatment through constant magnetic field
  • Method for improving magnetic property of high-entropy alloy by heat treatment through constant magnetic field
  • Method for improving magnetic property of high-entropy alloy by heat treatment through constant magnetic field

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Embodiment 1

[0020] In this embodiment, a kind of heat treatment using constant magnetic field to improve FeCoNi(CuAl) 0.8 A method for the magnetic properties of high-entropy alloys, comprising the steps of:

[0021] a. Alloy preparation: According to the atomic ratio of Fe, Co, Ni, Cu, and Al in the alloy is 1:1:1:0.8:0.8, use elemental Fe, Co, Ni, Cu, Al metal raw materials with a purity of 99.999% , using a vacuum arc melting method to melt Fe, Co, Ni, Cu, and Al pure metals to obtain a Fe-Co-Ni-Cu-Al master alloy melt;

[0022] b. Alloy material shaping treatment and compactness treatment: using copper mold suction casting method, the Fe-Co-Ni-Cu-Al alloy melt obtained in the above step a is made into 80mm×10mm×2mm flake FeCoNi (CuAl) 0.8 alloy material; then FeCoNi(CuAl) 0.8 The alloy material is cold rolled, FeCoNi(CuAl) 0.8 The alloy material is cold-rolled and compressed by 10% of its volume to obtain densified FeCoNi(CuAl) 0.8 Alloy; then using wire cutting technology, the o...

Embodiment 2

[0025] This embodiment is basically the same as Embodiment 1, especially in that:

[0026] In this embodiment, a kind of heat treatment using constant magnetic field to improve FeCoNi(CuAl) 0.8 A method for the magnetic properties of high-entropy alloys, comprising the steps of:

[0027] a. alloy preparation: this step is identical with embodiment one;

[0028] b. Alloy material shaping treatment and compactness treatment: this step is the same as that of Embodiment 1;

[0029] c. Magnetic field heat treatment: using magnetic field heat treatment equipment, under a uniform magnetic field with a magnetic field strength of 1.0T, heat to the target heat treatment temperature of 400°C at a heating rate of 20°C / min in an annealing furnace, and the heat treatment will be carried out in the step b. Prepared FeCoNi(CuAl) 0.8 The alloy flakes were kept warm for 1 hour, subjected to constant magnetic field heat treatment, and then passed through argon gas to cool to room temperature,...

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Abstract

The invention discloses a method for improving magnetic property of high-entropy alloy by heat treatment through a constant magnetic field. By heat treatment through the magnetic field, the content ofa BCC phase in a FeCoNi(CuAl)0.8 high-entropy alloy microstructure is increased, and the magnetic property is improved. The purpose of improving the magnetic property of the alloy can be achieved without changing ingredients of the alloy. The high-entropy alloy is subjected to heat treatment through the magnetic field, the tissue structure is changed obviously, and the magnetic property is improved remarkably; and the heat treatment temperature is low relatively, and the magnetic property of the alloy can be greatly improved under the condition that magnetic field strength is small.

Description

technical field [0001] The invention relates to a heat treatment process for high-entropy alloys, in particular to a FeCoNi(CuAl) 0.8 The heat treatment process of high-entropy alloys also particularly relates to a method for improving the magnetic properties of high-entropy alloys by using constant magnetic field heat treatment, which is applied to the technical field of heat treatment and processing of metal alloy materials. Background technique [0002] High-entropy alloys originated from the development of bulk amorphous alloys in the 1990s. They are composed of five or more components, and the atomic percentage of each component is equal. Later, in order to expand the scope of alloy design, the atomic percentage of each component of the high-entropy alloy is not limited to equal proportions, and the proportion of each component can be between 5 at.% and 35 at.%. [0003] Compared with traditional alloys, high-entropy alloys have more alloy components, and the forces an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22F1/16C21D1/04C21D1/74C22F1/02
Inventor 禹林业徐晖谭晓华侯雪玲李忠
Owner SHANGHAI UNIV
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