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Preparation method of high-entropy alloy powder and cladding layer and application

A high-entropy alloy and alloy powder technology, which is applied in the coating process and coating of metal materials, can solve problems such as the difficulty of taking advantage of the mechanical properties of high-entropy alloys, and achieve improved cladding layer performance, wear resistance, and The effect of hardness

Inactive Publication Date: 2014-11-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, high-entropy alloys are mainly prepared by vacuum electric arc furnace melting and casting. There are also methods for preparing high-entropy alloy films by electrochemical deposition and magnetron sputtering, but the thickness of the films prepared by these methods can only reach the micron scale. It is difficult to take advantage of the mechanical properties of high-entropy alloys, and there are certain requirements for the base material

Method used

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  • Preparation method of high-entropy alloy powder and cladding layer and application
  • Preparation method of high-entropy alloy powder and cladding layer and application
  • Preparation method of high-entropy alloy powder and cladding layer and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0030] 1. Calculate the proportion of FeNiCrAlCuMnx (take x=0) high-entropy alloy powder according to the molar ratio: Fe is 20mol%, Ni is 20mol%, Cr is 20mol%, Al is 20mol%, Cu is 20mol%, and the electronic scale is used Take the powder of various elements.

[0031] 2. Pour into a mortar and grind in the mortar for half an hour to mix well.

[0032] 3. Mix the prepared laser cladding powder, 92% and 8% ethanol to form a paste or paste, and then coat it on the surface of 42CrMo steel with a preset layer thickness of 1 mm. After air-drying, laser cladding is performed.

[0033] 4. The laser adopts JK2003SM type Nd:YAG, and the laser cladding process parameters are as follows: laser power is 1550KW, spot diameter is 0.8mm, scanning speed is 180mm / min, defocus is 0mm, protective gas is argon, and the gas flow rate is 25L / min.

[0034] 5. After laser cladding, aqua regia was used to corrode, and the metallographic photos of the cladding layer were obtained.

[0035] The microha...

Embodiment example 2

[0040] 1. Calculate the proportion of FeNiCrAlCuMnx (take x=1) high-entropy alloy powder according to the molar ratio: Fe is 16.67mol%, Ni is 16.67mol%, Cr is 16.67mol%, Al is 16.67mol%, Cu is 16.66mol% , Mn is 16.66mol%, the total molar ratio is 100%, and electronic scales are used to weigh the powders of various elements.

[0041] 2. Pour into a mortar and grind in the mortar for half an hour to mix well.

[0042] 3. Mix the prepared laser cladding powder, 95% and 5% ethanol into a paste or paste, and then coat it on the surface of 42CrMo steel with a preset layer thickness of 1 mm. After air-drying, laser cladding is performed.

[0043] 4. The laser adopts JK2003SM type Nd:YAG, and the laser cladding process parameters are as follows: laser power is 1550KW, spot diameter is 0.8mm, scanning speed is 180mm / min, defocus is 0mm, protective gas is argon, and the gas flow rate is 25L / min.

[0044] 5. After laser cladding, aqua regia was used to corrode, and the metallographic p...

Embodiment example 3

[0050] 1. According to the molar ratio, FeNiCrAlCuMnx (take x = 0.3) high-entropy alloy powder ratio of each metal element: Fe, Ni, Cr, Al and Cu are equimolar, Mn is 0.3 of the molar number of Cu, mixed uniformly and used, Refer to the above implementation case

[0051] 2. Laser cladding process: the laser power is 1650KW, the spot diameter is 1.0mm, the scanning speed is 200mm / min, the defocus is 0mm, the protective gas is helium, and the gas flow rate is 20L / min

[0052] 3. Use the same performance test, the results are shown in the table below:

[0053] hardness

[0054]

[0055] wear resistance

[0056]

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Abstract

The invention discloses a preparation method of high-entropy alloy powder and a cladding layer and application. The high-entropy alloy powder is composed of Fe, Ni, Cr, Al, Cu and Mn element powder, the composition is represented as FeNiCrAlCuMnx, wherein x is the mole ratio of Mn and its value range is 0-1. Matching calculation is carried out according to the mole ratio of each element, the mass of each component is accurately weighed, then the components are fully mixed to obtain the high-entropy alloy powder, and the high-entropy alloy powder is mixed with ethanol, then the mixture is used for coating the surface of a substrate material evenly, and after drying, laser cladding is carried out, thus obtaining the cladding layer. The invention provides the high-entropy alloy powder entirely composed of metal elements to conduct material surface modification, and through laser cladding, the cladding layer with a good shape can be obtained, thus improving the material hardness and wear resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and more specifically relates to a preparation method and application of a high-entropy alloy powder material and a cladding layer. Background technique [0002] High-entropy alloy is a new type of alloy first proposed by Professor Ye Junwei, a Taiwanese scholar in the mid-1990s. The high-entropy alloy designed based on the concept of equimolar ratio and high mixing entropy has simplified microstructure, nano-precipitates, Tissue characteristics such as amorphous structure and nano-grains. Multi-principal element high-entropy alloy breaks through the traditional single-element dominance. After solidification, multi-principal high-entropy alloy will not form a large number of metal compounds, but instead form a simple body-centered cubic or face-centered cubic phase or even amorphous. The resulting number of phases is much lower than that predicted by the equilibrium phase ratio. Therefore, thr...

Claims

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Application Information

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IPC IPC(8): C23C24/10B22F1/00C22C30/02
CPCC22C9/06C22C30/02C23C24/106
Inventor 罗震颜福裕谈辉段瑞
Owner TIANJIN UNIV
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