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High-entropy alloy CoCrFeMnNi and atomization powder making method manufacturing technique

A high-entropy alloy and atomization powder-making technology, applied in the field of metal materials, can solve the problems of uneven mixing, large particles, and microsegregation of high-entropy alloy CoCrFeMnNi, and achieve no microsegregation, uniform composition, and particle size deviation. small effect

Active Publication Date: 2019-06-11
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of prior art high-entropy alloy CoCrFeMnNi mixed unevenly, micro-segregation, larger particles, etc., to provide a high-entropy alloy CoCrFeMnNi and its atomization pulverization preparation process, specifically a A high-entropy alloy CoCrFeMnNi with uniform mixing, no micro-segregation and fine particles and its preparation process by electrode induction melting gas atomization method

Method used

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  • High-entropy alloy CoCrFeMnNi and atomization powder making method manufacturing technique
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  • High-entropy alloy CoCrFeMnNi and atomization powder making method manufacturing technique

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Effect test

Embodiment 1

[0047] The atomization pulverization preparation process of high-entropy alloy CoCrFeMnNi, the steps are as follows:

[0048] (1) Carry out cutting and cleaning pretreatment on Fe, Co, Ni, Cr and Mn elemental small pieces, and cut them into small pieces of the required weight by using a grinding wheel cutting machine. As a standard, use circular table saw, manual saw, wire cutting, etc. to cut the raw materials of each component into small pieces as large as possible, and use an electronic balance to weigh them, and then lightly polish the small pieces of each element to determine their quality. Fine-tuning is carried out to ensure that the amounts of each element are equal in substance, and the mass of each elemental small block obtained after cutting is: Fe elemental 111.6905g, Co elemental 117.8666g, Ni elemental 117.3866g, Cr elemental 103.9225g, Mn elemental 109.8813g; Cleaning is to immerse the cut element in acetone solution and add 28Hz ultrasonic vibration for 180 sec...

Embodiment 2

[0055] The atomization pulverization preparation process of high-entropy alloy CoCrFeMnNi, the steps are as follows:

[0056] (1) Carry out cutting and cleaning pretreatment to Fe, Co, Ni, Cr and Mn element simple substance small block, cutting is to adopt the grinding wheel cutting machine to process the simple substance small block of required weight, and cleaning is to immerse the cut simple substance into acetone solution And add ultrasonic vibration for 180 seconds to remove simple surface oil;

[0057] (2) Fe, Co, Ni, Cr and Mn elemental small pieces of equal substance amount are smelted with intermediate frequency induction furnace to obtain CoCrFeMnNi alloy bar stock, and the respective purity of Fe, Co, Ni, Cr and Mn elemental small pieces are all the same. It is 99.999%, and the parameters for melting with medium frequency induction furnace are: slowly increase the melting power of induction furnace at a speed of 7kW / 5min, so that the melting power reaches 44kW, and ...

Embodiment 3

[0062] The atomization pulverization preparation process of high-entropy alloy CoCrFeMnNi, the steps are as follows:

[0063] (1) Carry out cutting and cleaning pretreatment to Fe, Co, Ni, Cr and Mn element simple substance small block, cutting is to adopt the grinding wheel cutting machine to process the simple substance small block of required weight, and cleaning is to immerse the cut simple substance into acetone solution And add ultrasonic vibration for 180 seconds to remove simple surface oil;

[0064] (2) Fe, Co, Ni, Cr and Mn elemental small pieces of equal substance amount are smelted with intermediate frequency induction furnace to obtain CoCrFeMnNi alloy bar stock, and the respective purity of Fe, Co, Ni, Cr and Mn elemental small pieces are all the same. It is 99.992%, and the parameters for melting with medium frequency induction furnace are: slowly increase the melting power of induction furnace at a speed of 7kW / 5min, so that the melting power reaches 44kW, and ...

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Abstract

The invention relates to a high-entropy alloy CoCrFeMnNi and an atomization powder making method manufacturing technique. The atomization powder making method manufacturing technique comprises the steps that 1, Fe, Co, Ni, Cr and Mn elementary substance small pieces with the same substance amount are smelted with a medium-frequency induction furnace to obtain a CoCrFeMnNi alloy rod material; 2, the CoCrFeMnNi alloy rod material is made into CoCrFeMnNi high-entropy alloy powder with an electrode induction melting gas atomization method; the finally manufactured high-entropy alloy CoCrFeMnNi does not have micro-segregation; the average particle size is 36 mu m; the particle size ranges from 15 to 53 mu m; the whole appearance is round and smooth; a single FCC phase is presented; and the sphericity is good, and no obvious powder adhesion occurs. The technique is simple; product performance is excellent; and the problems of the high-entropy CoCrFeMnNi manufactured with a current techniqueof being nonuniform in impurity, having micro-segregation, being large in particle size, being large in particle size deviation, being poor in sphericity, having partial powder adhesion and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a high-entropy alloy CoCrFeMnNi and its preparation process by atomization pulverization method, in particular to a high-entropy alloy CoCrFeMnNi with uniform mixing, no micro-segregation and fine particles and its electrode Induction melting gas atomization method preparation process. Background technique [0002] High-entropy alloys, also known as "multi-principal high-entropy alloys", are usually composed of five or more metal or non-metal elements, and the components of each element are in equimolar ratios or close to equimolar ratios, and are prepared by melting or other methods. , Different from traditional alloys, the element content of each component of high-entropy alloys is relatively large. The nearly equimolar ratio makes the mixing entropy of high-entropy alloys much larger than that of traditional alloys, and the phase composition is generally a simple solid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/04B22F9/08
Inventor 高辰恺杨瑾袁易泽徐文虎邓沛然李忠文于治水
Owner SHANGHAI UNIV OF ENG SCI
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