Preparation method of prealloyed high-entropy alloy porous material

A pre-alloyed, porous material technology, applied in metal processing equipment, transportation and packaging, etc., to achieve high production efficiency, good economy, excellent corrosion resistance and high temperature oxidation resistance

Inactive Publication Date: 2019-04-16
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the application of high-entropy alloys as porous materials has not received much attention. Therefore, it is of great significance to develop a pre-alloyed CrNiFeTiMoW high-entropy alloy porous material that is resistant to corrosion and high temperature oxidation.

Method used

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0021] 1. A method for preparing a pre-alloyed CrNiFeTiMoW high-entropy alloy porous material according to this embodiment, the preparation steps are as follows:

[0022] Step 1, raw material weighing: Weigh ultrasonically treated Cr, Ni, Fe, Ti, Mo and W materials according to equimolar ratio;

[0023] Step 2: Atomized powder production: ① put the material weighed in step 1 into a medium-frequency induction melting furnace and melt it into a metal liquid; ② introduce a high-speed jet of argon flow through the nozzle to impact and shear the metal flow, breaking it into fine particles The metal droplet, the nozzle gap size is 0.5~1.0mm, and the spray angle is 30~60°; ③The liquid droplet is quenched in 1.8~2.0MPa p...

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Abstract

The invention relates to a preparation method of a prealloyed CrNiFeTiMoW high-entropy alloy porous material. The preparation method mainly comprises the steps that ultrasonically-treated Cr, Ni, Fe,Ti, Mo and W materials are weighed according to an equimolar ratio; the weighed materials are molten through vacuum arc and then are atomized to prepare prealloyed CrNiFeTiMoW high-entropy alloy; stearic acid accounting for 2-4% of the total powder content is added into the powder, and after drying, a pressed blank is obtained through cold press forming; and the pressed blank is placed in a vacuumsintering furnace to be sintered to prepare the high-entropy alloy porous material. According to the prealloyed CrNiFeTiMoW high-entropy alloy porous material prepared through the preparation method,the production process is simple and easy to implement, the sintering period is short, the preparation cost is low, the high open porosity and rich connected pores are obtained, ingredients are uniform, the structure is controllable, and the material can be used for liquid-solid or gas-solid separation conditions of corrosion resistance and high temperature oxidation resistance.

Description

technical field [0001] The invention relates to a preparation technology for preparing an inorganic porous material by using pre-alloyed powder, in particular to a preparation method for a pre-alloyed corrosion-resistant CrNiFeTiMoW high-entropy alloy porous material, which belongs to the technical field of preparation of alloy materials. Background technique [0002] Porous materials include porous ceramic materials and porous metal materials, which have important uses in the fields of filtration and separation, throttling, heat insulation, sound attenuation, and catalysis. Porous ceramic materials have the advantages of high temperature resistance, corrosion resistance, wear resistance, chemical corrosion resistance, high mechanical strength and easy regeneration, and can be used as high-temperature filter materials, catalyst carriers, porous batteries for fuel cells, biomedical implant materials, absorbent Acoustic damping etc. It is increasingly showing its unique appli...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F3/11C22C30/00C22C1/08
CPCC22C30/00B22F3/1007B22F3/1121B22F9/082B22F2998/10B22F2999/00B22F2201/20B22F1/10B22F3/02
Inventor 肖逸锋夏秀艳吴靓许艳飞钱锦文张乾坤贾友禄叶明强曾毅夫周益辉贺惠民
Owner XIANGTAN UNIV
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