A feconicrmn high-entropy alloy and a method for preparing a wear-resistant coating using the alloy

A high-entropy alloy and coating technology, applied in the field of engineering science, can solve problems such as hindering widespread application, high price, and high cost of bulk alloys, and achieve the effects of improving solubility, low cost, and improving hardness and wear resistance

Active Publication Date: 2022-02-01
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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  • A feconicrmn high-entropy alloy and a method for preparing a wear-resistant coating using the alloy
  • A feconicrmn high-entropy alloy and a method for preparing a wear-resistant coating using the alloy
  • A feconicrmn high-entropy alloy and a method for preparing a wear-resistant coating using the alloy

Examples

Experimental program
Comparison scheme
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-resistant coating by using the alloy. The alloy system is formed by using Fe, Co, Ni, Cr, and Mn elements as main elements and according to equiatomic ratio or near equiatomic ratio. The purpose of the present invention is to provide a method for preparing a FeCoNiCrMn high-entropy alloy wear-resistant coating, which uses a gas atomization method to prepare FeCoNiCrMn spherical high-entropy alloy powder, and uses an atmospheric plasma spraying process to prepare a wear-resistant coating on the surface of a stainless steel substrate. By adjusting the spraying parameters, the maximum optimization of the microscopic morphology of the coating is achieved, and the spraying parameters with the best wear resistance of the coating are obtained. The FeCoNiCrMn high-entropy alloy coating prepared by the invention has good interlayer bonding, compact structure and excellent 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 Patents(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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