Application of high-entropy alloy powder to laser cladding

A high-entropy alloy and laser cladding technology, applied in metal material coating process, coating and other directions, can solve the problem of difficult to exert the advantages of high-entropy alloy mechanical properties, etc., to improve the performance of cladding layer, improve wear resistance, Effects of changing performance

Inactive Publication Date: 2016-03-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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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  • Application of high-entropy alloy powder to laser cladding
  • Application of high-entropy alloy powder to laser cladding
  • Application of high-entropy alloy powder to laser cladding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0031] 1. Calculate the ratio of FeNiCrAlCuMnx (take x=0) high-entropy alloy powder according to the molar ratio: Fe is 20 mol%, Ni is 20 mol%, Cr is 20 mol%, Al is 20 mol%, Cu is 20 mol%, using an electronic scale Take the powder of various elements.

[0032] 2. Pour into a mortar and grind in the mortar for half an hour to mix well.

[0033] 3. Mix the prepared laser cladding powder, 92% and 8% ethanol into a paste or paste, and coat it on the surface of 42CrMo steel with a pre-set layer thickness of 1mm, air-dry and then perform laser cladding.

[0034] 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.

[0035] 5. After laser cladding, aqua regia was used to corrode, and the metallographic photos of the cladding layer were obtained.

[0036] The microhardness of the claddin...

Embodiment example 2

[0041] 1. Calculate the ratio of FeNiCrAlCuMnx (taking 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.

[0042] 2. Pour into a mortar and grind in the mortar for half an hour to mix well.

[0043] 3. Mix the prepared laser cladding powder with 95% and 5% 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, perform laser cladding.

[0044] 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.

[0045] 5. After laser cladding, aqua regia was used to corrode, and the metallographic ph...

Embodiment example 3

[0051] 1. Carry out FeNiCrAlCuMnx (take x=0.3) high-entropy alloy powder proportioning each metal element according to molar ratio: Fe, Ni, Cr, Al and Cu are equimolar, Mn is 0.3 of Cu molar number, carry out mixing and use, Refer to the above implementation case

[0052] 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

[0053] 3. Use the same performance test, the results are shown in the table below:

[0054] hardness

[0055]

[0056] wear resistance

[0057]

[0058]

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Abstract

The invention discloses application of high-entropy alloy powder to laser cladding; the high-entropy alloy powder consists of Fe, Ni, Cr, Al, Cu and Mn element powder; the composition is represented as FeNiCrAlCuMnx; and x is the mol ratio of Mn, and has a value range of 0-1. All the components are fully and uniformly mixed after accurate weighing of respective mass according to respective mol ratios; and the high-entropy alloy powder and ethanol are uniformly coated on the surface of a basal body material after the mixing, and are dried for laser cladding to obtain a cladding layer. According to the high-entropy alloy powder in laser cladding, the cladding layer with excellent formability is obtained through material surface modification to improve the material hardness and wear resistance.

Description

[0001] The application of the present invention is a divisional application of the parent application "Preparation method and application of high-entropy alloy powder and cladding layer". The application number of the parent application is 201310471107X, and the filing date of the parent application is October 10, 2013. technical field [0002] 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 [0003] 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C23C24/10
CPCC22C9/06C22C30/02C23C24/106
Inventor 罗震颜福裕谈辉段瑞
Owner TIANJIN UNIV
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