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A high-entropy alloy coating resistant to high temperature wear and its preparation process and application

A high-entropy alloy and coating technology, which is applied in the field of high-entropy alloy wear-resistant coating and titanium alloy parts, to achieve the effect of increasing hardness and improving performance

Active Publication Date: 2020-12-11
QINGDAO BINHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] But the inventors found that: at present, there are few reports about the TiAlNiSiV high-entropy alloy coating reinforced by laser cladding on the surface of titanium alloys

Method used

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  • A high-entropy alloy coating resistant to high temperature wear and its preparation process and application
  • A high-entropy alloy coating resistant to high temperature wear and its preparation process and application
  • A high-entropy alloy coating resistant to high temperature wear and its preparation process and application

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A multi-principal element high-entropy alloy coating, the composition of which is a mixed powder of 22% Ti, 13% Ni, 28% Al, 13% Si and 24% V (hereinafter referred to as: TiAlNiSiV), prepared by laser cladding technology , the specific steps are as follows:

[0055] (1) Cut the titanium plate to the required size by wire electric discharge cutting, then polish, clean and dry it for use;

[0056] (2) weigh the metal powder according to a certain molar ratio, and use a vortex powder mixer to mix the powder evenly;

[0057] (3) Evenly spread the mixed powder of the cladding material on the surface of the titanium alloy substrate, the thickness is controlled at 0.6-1 mm, and the thickness is kept uniform;

[0058] (4) For the laser cladding of the mixed powder on the surface of the titanium alloy, the laser power is selected as 2kW, the scanning speed of the laser is 300mm / min, the argon gas is blown for protection, the gas flow rate is 10-15L / min, and the laser spot diamet...

Embodiment 2

[0062] A multi-principal element high-entropy alloy coating, whose composition is 22% Ti, 13% Ni, 28% Al, 13% Si and 24% V, is prepared by laser cladding technology, and the specific steps are as follows:

[0063] (1) Cut the titanium plate to the required size by wire electric discharge cutting, then polish, clean and dry it for use;

[0064] (2) Weigh the metal powder and B according to a certain molar ratio 4 C powder mixing, its ratio is 95% (TiNiAlSiV) + 5% B 4 C and use a vortex mixer to mix the powder evenly;

[0065] (3) Evenly spread the mixed powder of the cladding material on the surface of the titanium alloy substrate, the thickness is controlled at 0.6-1 mm, and the thickness is kept uniform;

[0066] (4) For the laser cladding of the mixed powder on the surface of the titanium alloy, the laser power is selected as 1kW, the scanning speed of the laser is 300mm / min, the argon gas is blown for protection, the gas flow rate is 10-15L / min, and the laser spot diamete...

Embodiment 3

[0070] A multi-principal high-entropy alloy coating whose composition is metal powder Ti, Ni, Al, Si and V, and the ceramic phase is B 4 The mixed powder of C is prepared by laser cladding technology, and the specific steps are as follows:

[0071] (1) Cut the titanium plate to the required size by wire electric discharge cutting, then polish, clean and dry it for use;

[0072] (2) Weigh the metal powder and B according to a certain molar ratio 4 C powder mixing, and use a vortex mixer to mix the powder evenly;

[0073] (3) Evenly spread the mixed powder of the cladding material on the surface of the titanium alloy substrate, the thickness is controlled at 0.6-1 mm, and the thickness is kept uniform;

[0074] (4) For the laser cladding of the mixed powder on the surface of the titanium alloy, the laser power is selected as 2kW, the scanning speed of the laser is 300mm / min, the argon gas is blown for protection, the gas flow rate is 10-15L / min, and the laser spot diameter is ...

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Abstract

The invention relates to a high-entropy alloy coating resistant to high-temperature abrasion and a preparation process and application thereof. The preparation process comprises the following steps: (1) the surface of a titanium alloy sample is polished and washed; (2) metal powder, a ceramic hard phase and rare earth oxide are evenly mixed, and cladding material powder is formed to be flatly laidon the washed surface of a titanium alloy; and (3) the titanium alloy coating is prepared through laser cladding, wherein the metal powder includes Ti, Ni, Al, Si and V, a ceramic phase material is B4C or TiC or TiN, and the rare earth oxide is Y2O3. According to the high-entropy alloy coating, the hardness of a titanium alloy part can be remarkably improved, abrasion resistance of the titanium alloy part is improved, and the using range of the titanium alloy part is enlarged.

Description

technical field [0001] The invention belongs to a high-entropy alloy coating resistant to high temperature wear, in particular to a high-entropy alloy wear-resistant coating reinforced by laser cladding ceramic phase on the surface of a titanium alloy and its preparation process, which is suitable for high-temperature and wear-resistant complex environments Titanium alloy parts for next application. Background technique [0002] Due to the characteristics of low density, high specific strength, good fatigue creep performance, and excellent corrosion resistance, titanium alloys are widely used in aviation, aerospace, ships, weapons, chemicals, metallurgy, and daily life. Titanium alloys have low surface hardness, resulting in poor load-carrying capacity, and are prone to adhesive wear and fretting wear with other materials, resulting in low wear resistance, especially under high-temperature wear service conditions, which severely limits its wide range of applications. applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C30/00
Inventor 张红霞戴景杰孙彩霞
Owner QINGDAO BINHAI UNIV
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