CN-117684162-B - FeCuNiTiAl-based high-entropy alloy composite coating and preparation method and application thereof

Abstract

The invention provides FeCuNiTiAl-based high-entropy alloy composite coating and a preparation method and application thereof, and belongs to the technical field of coatings. The preparation method of the FeCuNiTiAl-based high-entropy alloy composite coating comprises the steps of mixing FeCuNiTiAl high-entropy alloy powder with tungsten carbide powder to obtain cladding powder, wherein the mass content of the tungsten carbide powder in the cladding powder is 5-15%, paving the cladding powder on the surface of a base material to form a cladding powder layer, and then performing laser cladding treatment to form the FeCuNiTiAl-based high-entropy alloy composite coating on the surface of the base material. According to the invention, the FeCuNiTiAl high-entropy alloy powder and the tungsten carbide powder are mixed and then subjected to laser cladding treatment, so that the corrosion resistance of the FeCuNiTiAl high-entropy alloy coating can be effectively improved.

Inventors

• HUANG JIANG
• SHI WENQING
• LI KAIYUE
• WANG WENHUA
• XIE YUPING

Assignees

• 广东海洋大学

Dates

Publication Date

20260505

Application Date

20231221

Claims (8)

1. 1. A preparation method of FeCuNiTiAl-based high-entropy alloy composite coating comprises the following steps: Mixing FeCuNiTiAl high-entropy alloy powder with tungsten carbide powder to obtain cladding powder, wherein the mass content of the tungsten carbide powder in the cladding powder is 10-15%, the granularity of the tungsten carbide powder is 770-870nm, and the granularity of the FeCuNiTiAl high-entropy alloy powder is 45-70 mu m; and paving the cladding powder on the surface of a base material to form a cladding powder layer, and then carrying out laser cladding treatment to form the FeCuNiTiAl-base high-entropy alloy composite coating on the surface of the base material.
2. 2. The method of claim 1, wherein Fe, cu, ni, ti and Al are the same atomic percent in the FeCuNiTiAl high-entropy alloy powder.
3. 3. The method of claim 1, wherein the thickness of the layer of cladding powder is 1mm.
4. 4. The preparation method according to claim 1, wherein the conditions of the laser cladding treatment comprise a laser power of 1400W, a spot diameter of 2mm, a laser scanning rate of 500mm/min, a lap ratio of 40% and a laser defocus of +5mm.
5. 5. The method of claim 1, wherein the base material is 316 stainless steel.
6. 6. The FeCuNiTiAl-based high-entropy alloy composite coating prepared by the preparation method of any one of claims 1-5 comprises a FeCuNiTiAl high-entropy alloy matrix and tungsten carbide particles distributed in the FeCuNiTiAl high-entropy alloy matrix.
7. 7. The FeCuNiTiAl-based high-entropy alloy composite coating according to claim 6, wherein the thickness of the FeCuNiTiAl-based high-entropy alloy composite coating is 0.8-1.2 mm.
8. 8. Use of the FeCuNiTiAl-based high-entropy alloy composite coating according to claim 6 or 7 in bridge, marine, aerospace or chemical mechanical equipment.

Description

FeCuNiTiAl-based high-entropy alloy composite coating and preparation method and application thereof Technical Field The invention relates to the technical field of coatings, in particular to a FeCuNiTiAl-based high-entropy alloy composite coating, a preparation method and application thereof. Background FeCuNiTiAl high-entropy alloy has good corrosion resistance, wear resistance, oxidation resistance and higher hardness, and is an ideal material for ocean engineering materials. However, due to the limitation of the preparation technology of FeCuNiTiAl high-entropy alloy, the mass FeCuNiTiAl high-entropy alloy material cannot be produced in a large area at present, and FeCuNiTiAl high-entropy alloy powder materials are more common in the market. The FeCuNiTiAl high-entropy alloy coating is prepared from FeCuNiTiAl high-entropy alloy powder material, so that the surface modification of the ocean engineering material can be realized, and the purpose of corrosion resistance is achieved. However, the metal elements corresponding to the metal elements in FeCuNiTiAl high-entropy alloy have poor stability, and outer electrons are easily lost in the use process, so that corrosion is caused. Therefore, although the corrosion resistance of FeCuNiTiAl high-entropy alloy is greatly improved compared with that of the traditional ocean engineering material, the use requirement of the ocean engineering material with higher requirement on the corrosion resistance can not be met. Disclosure of Invention The invention aims to provide a FeCuNiTiAl-based high-entropy alloy composite coating, a preparation method and application thereof, and the FeCuNiTiAl-based high-entropy alloy composite coating prepared by the method has excellent corrosion resistance. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides a preparation method of FeCuNiTiAl-based high-entropy alloy composite coating, which comprises the following steps: mixing FeCuNiTiAl% of high-entropy alloy powder with tungsten carbide powder to obtain cladding powder, wherein the mass content of the tungsten carbide powder in the cladding powder is 5-15%; and paving the cladding powder on the surface of a base material to form a cladding powder layer, and then carrying out laser cladding treatment to form the FeCuNiTiAl-base high-entropy alloy composite coating on the surface of the base material. Preferably, the granularity of the tungsten carbide powder is 770-870nm. Preferably, the grain size of the FeCuNiTiAl high-entropy alloy powder is 45-70 μm. Preferably, fe, cu, ni, ti and Al in the FeCuNiTiAl high-entropy alloy powder are the same in atomic percent. Preferably, the thickness of the cladding powder layer is 1mm. Preferably, the conditions of the laser cladding treatment comprise 1400W of laser power, 2mm of spot diameter, 500mm/min of laser scanning speed, 40% of overlap ratio and +5mm of laser defocusing amount. Preferably, the base material is 316 stainless steel. The invention provides the FeCuNiTiAl-base high-entropy alloy composite coating prepared by the preparation method in the technical scheme, which comprises a FeCuNiTiAl high-entropy alloy matrix and tungsten carbide particles distributed in the FeCuNiTiAl high-entropy alloy matrix. Preferably, the FeCuNiTiAl-base high-entropy alloy composite coating has a thickness of 0.8-1.2 mm. The invention provides application of the FeCuNiTiAl-based high-entropy alloy composite coating in bridge, ship, aerospace or chemical mechanical equipment. The invention provides a preparation method of FeCuNiTiAl-base high-entropy alloy composite coating, which comprises the steps of mixing FeCuNiTiAl high-entropy alloy powder with tungsten carbide powder to obtain cladding powder, wherein the mass content of the tungsten carbide powder in the cladding powder is 5-15%, paving the cladding powder on the surface of a base material to form a cladding powder layer, and then carrying out laser cladding treatment to form a FeCuNiTiAl-base high-entropy alloy composite coating on the surface of the base material. The tungsten carbide powder has stable chemical property, hardly participates in chemical reaction, has extremely outstanding corrosion resistance, but has larger brittleness and poorer toughness, and the invention mixes FeCuNiTiAl high-entropy alloy powder and tungsten carbide powder and then carries out laser cladding treatment, thus being capable of effectively improving the corrosion resistance of FeCuNiTiAl high-entropy alloy coating. Detailed Description The invention provides a preparation method of FeCuNiTiAl-based high-entropy alloy composite coating, which comprises the following steps: mixing FeCuNiTiAl% of high-entropy alloy powder with tungsten carbide powder to obtain cladding powder, wherein the mass content of the tungsten carbide powder in the cladding powder is 5-15%; and paving the cladding powder on the surface of a base material