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FeCoNiCrMn high-entropy alloy and method for preparing wear-resisting coating through alloy

A high-entropy alloy and wear-resistant coating technology, applied in the field of engineering science, can solve the problems of high cost of bulk alloys, hindering wide application and high price, and achieve the effects of low cost, improved solubility, and improved friction performance.

Active Publication Date: 2019-06-25
扬州睿德石油机械有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, high-entropy alloys are mainly prepared by smelting bulk alloys. CN108103381A proposes to use high-energy ball milling to prepare high-entropy alloy powders, and to prepare FeCoNiCrMn block alloys by spark plasma sintering. The elements of high-entropy alloys are all metals with relatively high prices. Elements, due to the high cost of preparing bulk alloys, hinders its wide application in industry. The preparation of FeCoNiCrMn high-entropy alloy coatings by plasma spraying technology can form special functional coatings on the surface of workpieces with the advantage of greatly reducing economic costs. coating

Method used

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  • FeCoNiCrMn high-entropy alloy and method for preparing wear-resisting coating through alloy

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Experimental program
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Effect test

Embodiment 1

[0032] 1. Design the high-entropy alloy composition according to the equiatomic ratio, weigh the original powder with a purity higher than 99.9%, and prepare spherical high-entropy alloy powder by gas atomization.

[0033] 2. Sieve the high-entropy alloy powder prepared by gas atomization, and select the powder with a particle size range of 45-84 mm to ensure good fluidity of the powder during the spraying process, and place the high-entropy alloy powder at 90 Dry at ℃ for 2 hours for later use.

[0034] 3. Choose 304L stainless steel as the substrate, ultrasonically clean the substrate with ethanol to remove oil stains, and roughen the substrate by sandblasting to increase the bonding strength between the coating and the substrate.

[0035] 4. Using the high-entropy alloy powder prepared above as a raw material, spray it on the surface of the substrate after sandblasting and roughening treatment by atmospheric plasma spraying equipment to obtain a FeCoNiCrMn high-entropy allo...

Embodiment 2

[0041] The differences between this example and Example 1 are: the hydrogen flow rate in step 4 is 5 L / min, the spraying distance is 135 m; the heat treatment temperature in step 5 is 800 °C, and the heat treatment time is 3 h. In step 8, the wear rate of the sprayed FeCoNiCrMn coating was 3.21×10 -4 mm 3 / N m, the coating wear rate after heat treatment is 5.48×10 -5 mm 3 / N·m.

Embodiment 3

[0043] The differences between this example and Example 1 are: the hydrogen flow rate in step 4 is 4 L / min, the spraying distance is 145 mm; the heat treatment temperature in step 5 is 750 °C, and the heat treatment time is 2 h. In step 8, the wear rate of the sprayed FeCoNiCrMn coating was 4.18×10 -4 mm 3 / N m, the coating wear rate after heat treatment is 5.64×10 -5 mm 3 / N·m.

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Abstract

The invention discloses a FeCoNiCrMn high-entropy alloy and a method for preparing a wear-resisting coating through the alloy. Elements Fe, Co, Ni, Cr and Mn are adopted as main elements, and an alloysystem is formed according to the equal atomic ratio or the approximate equal atomic ratio. The preparation method of the wear-resisting coating of the FeCoNiCrMn high-entropy alloy is provided. FeCoNiCrMn spherical high-entropy alloy powder is prepared through a gas atomization method, and the wear-resisting coating is prepared on the surface of a stainless steel matrix through an atmosphere plasma spraying process. Spraying parameters are adjusted, the microstructure of the coating is optimized to the largest degree, and the spraying parameters with the optimal coating wear resistance are obtained. The prepared FeCoNiCrMn high-entropy alloy is good in coating combination, compact in structure and extremely good in wear resistance.

Description

technical field [0001] The invention discloses a preparation method of a FeCoNiCrMn high-entropy alloy wear-resistant coating, which belongs to the field of engineering science. Background technique [0002] Since it was first proposed in 2004, high-entropy alloys have set off a great upsurge in the material field and have aroused great interest from researchers. High-entropy alloy is an alloy system composed of five or more elements as the main components, according to the equiatomic ratio or near equiatomic ratio. The atomic percentage of each element is between 5% and 35%. The multi-principal element characteristics of the alloy, the high-entropy alloy has four major effects, namely, the high-entropy effect in thermodynamics, the hysteresis diffusion effect in kinetics, the lattice distortion effect in structure and the "cocktail" effect in performance, making high-entropy alloys Entropy alloys have excellent properties such as high hardness, high toughness, high wear re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C23C4/134C23C4/08
Inventor 肖金坤张伟张超任永先朱敏山
Owner 扬州睿德石油机械有限公司
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