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

一种高熵合金、合金粉末的技术，应用在多主元激光熔覆用高熵合金粉末及熔覆层制备领域，能够解决激光熔覆高熵合金涂层少等问题，达到提高自熔性、耐磨性好、硬度高的效果

Inactive Publication Date: 2017-01-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on laser cladding high-entropy alloy coatings, and they are still in their infancy.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0029] 1. Calculate the ratio of FeNiCrAlSiCu 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%, Si is 16.66mol%, Cu is 16.66mol% , the total molar ratio is 100%, and electronic scales are used to weigh the powders of various elements.

[0030] 2. Pour into a mortar and grind in the mortar for half an hour to mix well.

[0031] 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.

[0032] 4. Laser cladding process parameters are: laser power 1550KW, spot diameter 0.8mm, scanning speed 180mm / min, defocusing distance 0mm, protective gas argon, gas flow rate 25L / min.

[0033] 5. After laser cladding, aqua regia was used to corrode, and the metallographic photos of the cladding layer were obtained.

[0034] The microhardness of the cladding ...

Embodiment example 2

[0039] 1. 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 2 mm. After air drying, perform laser cladding.

[0040] 2. Laser cladding process parameters are: laser power 1650KW, spot diameter 1.0mm, scanning speed 200mm / min, defocusing distance 0mm, protective gas helium, gas flow rate 20L / min.

[0041] 3. Use the same performance test, the results are shown in the table below:

[0042]

Embodiment example 3

[0044] 1. Mix the prepared laser cladding powder, 94% and 6% ethanol into a paste or paste, and then coat it on the surface of 42CrMo steel with a preset layer thickness of 1.5mm. After air-drying, laser cladding is performed.

[0045] 2. Laser cladding process parameters are: laser power 1620KW, spot diameter 0.9mm, scanning speed 180mm / min, defocusing distance 0mm, protective gas argon, gas flow rate 22L / min.

[0046] 3. Use the same performance test, the results are shown in the table below:

[0047]

[0048]

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Abstract

The invention discloses a six-element high-entropy alloy powder, a laser cladding layer preparation method and application. The alloy powder composition is represented as FeNiCrAlSiCu, and the six metal elements are consistent in mole number. Firstly, blending calculation is carried out according to the mole ratio of each element, and after accurate weighing of the mass of each component, the components are thoroughly mixed evenly so as to obtain the six-element high-entropy alloy powder. The alloy powder provided by the invention can be applied to laser cladding welding, the six-element high-entropy alloy powder is mixed with ethanol, the mixture is employed for coating the surface of a matrix material evenly, and after drying performing laser cladding, thus obtaining a cladding layer. The high-entropy alloy powder provided according to the technical scheme of the invention is composed of metallic and non-metallic elements, the self-fluxing of the powder is improved, the cladding layer with good shape, high hardness and good wear resistance can be prepared, and the performance is obviously improved compared with the matrix.

Description

technical field [0001] The invention relates to the field of preparation of high-entropy alloy powder and cladding layer for multi-principal element laser cladding, and more specifically relates to a preparation method and application of six-element high-entropy alloy powder and laser cladding layer. Background technique [0002] Multi-principal element high-entropy alloy is a new type of alloy proposed by Professor Ye Junwei, a Taiwanese scholar in my country in the 1990s. High-entropy alloy is different from traditional alloys dominated by a single element. It is composed of 5 to 13 elements. The mole fraction of each element is between 5% and 35%, and its performance is determined by the joint action of various principal elements. The proposal of this alloy design concept breaks the traditional design idea of ​​single-element-based alloys and opens up a new field of alloy design. Because high-entropy alloys exhibit excellent properties that many traditional alloys do not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C23C24/10
CPCC22C9/06C22C30/02C23C24/106
Inventor 罗震姚杞谈辉段瑞
Owner TIANJIN UNIV
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