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A kind of alnbmovti high entropy alloy powder and its application

A high-entropy alloy and metal powder technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of difficult large-scale application, uneven cooling rate of castings, difficult mixing of components, etc., to achieve no cracks, High lattice distortion and good corrosion resistance

Active Publication Date: 2020-11-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vacuum arc melting is a method with simple equipment, but due to the uneven cooling rate of castings, large grains appear in some areas, and the structure is directional crystallized, so it is difficult to mix the ingredients evenly
The product prepared by mechanical alloying is in a powder state, and it is necessary to select an appropriate method for post-processing to further consolidate it into a block sample. The process is cumbersome. The thickness of the high-entropy alloy film prepared by sputtering and thermal spraying is generally Micron level, relatively thin, it is difficult to apply on a large scale in actual production

Method used

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  • A kind of alnbmovti high entropy alloy powder and its application
  • A kind of alnbmovti high entropy alloy powder and its application
  • A kind of alnbmovti high entropy alloy powder and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: An AlNbMoVTi high-entropy alloy powder, consisting of Al, Nb, Mo, V and Ti metal powders, wherein the molar ratio of Al, Nb, Mo, V and Ti is 1:1:1:1:0.5;

[0022] The method for preparing AlNbMoVTi high-entropy alloy powder for laser cladding to prepare a cladding layer, the specific steps are as follows:

[0023] (1) Mix Al, Nb, Mo, V and Ti metal powders uniformly and carry out vacuum ball milling for 3.5 hours to obtain AlNbMoVTi high-entropy alloy powder; the particle size of AlNbMoVTi high-entropy alloy powder is 200-320 mesh;

[0024] (2) The substrate (Ti6-Al4-V) is mechanically polished to remove oxides, acetone is used to remove oil stains, and ultrasonic alcohol cleaning is performed to obtain a pretreated substrate (Ti6-Al4-V) for removing scale and oil stains; the step (1) The AlNbMoVTi high-entropy alloy powder is preset on the surface of the pretreated substrate (Ti6-Al4-V) to remove scale and oil stains to form a prefabricated layer, wherein th...

Embodiment 2

[0029] Example 2: An AlNbMoVTi high-entropy alloy powder, consisting of Al, Nb, Mo, V and Ti metal powders, wherein the molar ratio of Al, Nb, Mo, V and Ti is 1:1:1:1:1;

[0030] The method for preparing AlNbMoVTi high-entropy alloy powder for laser cladding to prepare a cladding layer, the specific steps are as follows:

[0031] (1) Mix Al, Nb, Mo, V and Ti metal powders uniformly and carry out vacuum ball milling for 4.5 hours to obtain AlNbMoVTi high-entropy alloy powder; the particle size of AlNbMoVTi high-entropy alloy powder is 170-250 mesh;

[0032] (2) The substrate (Ti6-Al4-V) is mechanically polished to remove oxides, acetone is used to remove oil stains, and ultrasonic alcohol cleaning is performed to obtain a pretreated substrate (Ti6-Al4-V) for removing scale and oil stains; the step (1) The AlNbMoVTi high-entropy alloy powder is preset on the surface of the pretreated substrate (Ti6-Al4-V) to remove scale and oil stains to form a prefabricated layer, wherein the ...

Embodiment 3

[0037] Embodiment 3: A kind of AlNbMoVTi high entropy alloy powder, is made up of Al, Nb, Mo, V and Ti metal powder, wherein the molar ratio of Al, Nb, Mo, V and Ti is 1:1:1:1:1.5;

[0038] The method for preparing AlNbMoVTi high-entropy alloy powder for laser cladding to prepare a cladding layer, the specific steps are as follows:

[0039] (1) Mix Al, Nb, Mo, V and Ti metal powders uniformly and carry out vacuum ball milling for 4.5 hours to obtain AlNbMoVTi high-entropy alloy powder; the particle size of AlNbMoVTi high-entropy alloy powder is 170-290 mesh;

[0040](2) The substrate (Ti6-Al4-V) is mechanically polished to remove oxides, acetone is used to remove oil stains, and ultrasonic alcohol cleaning is performed to obtain a pretreated substrate (Ti6-Al4-V) for removing scale and oil stains; the step (1) The AlNbMoVTi high-entropy alloy powder is preset on the surface of the pretreated substrate (Ti6-Al4-V) to remove scale and oil stains to form a prefabricated layer, wh...

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Abstract

The invention discloses AlNbMoVTi high-entropy alloy powder and an application thereof, and belongs to the technical field of laser cladding. The AlNbMoVTi high-entropy alloy powder is composed of Al,Nb, Mo, V and Ti metal powder, wherein the molar ratio of Al, Nb, Mo, V to Ti is 1:1:1:1:x, and x is greater than or equal to 0.5 and less than or equal to 2.0; the Al, Nb, Mo, V and Ti metal powderare uniformly mixed and is subject to vacuum ball milling for more than 3 hours to obtain the AlNbMoVTi high-entropy alloy powder; and the AlNbMoVTi high-entropy alloy powder is preset on the surfaceof a pre-treatment base body to form a prefabricated layer, constant-temperature treatment is carried out at the temperature of 80-100 DEG C for 6-10 hours, and laser cladding is carried out to obtainthe high-entropy alloy cladding layer. According to the AlNbMoVTi high-entropy alloy powder, the cladding layer has excellent wear resistance and corrosion resistance, and a coating structure is excellent; and a fine dilution area is formed between the laser cladding layer and a base material, so that metallurgical bonding is formed, a good bonding effect is achieved between the base material andthe cladding layer, and the durability of the coating can be improved.

Description

technical field [0001] The invention relates to an AlNbMoVTi high-entropy alloy powder and its application, belonging to the technical field of laser cladding. Background technique [0002] High-entropy alloy is a multi-principal alloy, which is different from traditional alloys. It is generally a new type of alloy that is composed of more than five elemental principal components according to the equiatomic ratio or close to the equiatomic ratio. This alloy can Inhibiting complex phase structures and the generation of a large number of intermetallic compounds has obvious advantages in structure and performance compared with traditional alloys. The performance of alloys is determined by the joint action of multiple principal components. [0003] Existing methods for preparing high-entropy alloys include vacuum arc melting, mechanical alloying, sputtering, thermal spraying, and laser cladding. The vacuum arc melting method has simple equipment, but due to the uneven cooling r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C23C24/10B22F1/00
CPCB22F1/0003C22C30/00C23C24/106
Inventor 刘洪喜张璐璐张晓伟赵艳爽郝轩宏
Owner KUNMING UNIV OF SCI & TECH