CN-116855873-B - Method for preparing superhard wear-resistant coating by supersonic arc spraying technology and application

Abstract

The invention belongs to the technical field of high-hardness wear-resistant coatings, and discloses a method for preparing a titanium nitride/titanium oxide superhard wear-resistant coating by using a supersonic arc spraying technology and application thereof. The high-hardness wear-resistant corrosion-resistant composite ceramic coating is a TiN-TiO 2 -TiN 0.3 composite ceramic coating, has thickness and microstructure controllability, and can realize layered and uniform distribution of titanium nitride and oxide thereof, wherein the proportion of the titanium nitride of the superhard phase exceeds 80 percent. The coating adopts pure titanium wires which are easy to purchase in the market as raw materials, adopts a supersonic arc spraying technology, and prepares the wear-resistant and corrosion-resistant ceramic composite coating on the surfaces of engineering equipment and material products such as common structural steel, aluminum alloy and the like by accurately adjusting spraying parameters. The preparation method of the coating is simple, the construction and processing environment has no strict requirements, and the preparation efficiency is high. The coating can be used for surface protection of various workpieces and engineering structures in the fields of service engineering equipment, severe marine wear working conditions and the like in marine environments.

Inventors

• YU ZHENTAO
• WU LIN
• ZHENG BAOCHAO

Assignees

• 暨南大学

Dates

Publication Date

20260505

Application Date

20230619

Claims (8)

1. 1. The high-hardness wear-resistant corrosion-resistant composite ceramic coating is characterized by being prepared from pure titanium wires through supersonic arc spraying, wherein the high-hardness wear-resistant corrosion-resistant composite ceramic coating is a TiN 0.3 -TiO 2 -TiN composite ceramic coating; the content of nitride of superhard phase titanium in the high-hardness wear-resistant corrosion-resistant composite ceramic coating exceeds 80%; The technological parameters of the supersonic electric arc spraying are that the working voltage of the electric arc is 30-42V, the working current of the electric arc is less than or equal to 150A, the wire feeding speed is 5-9 m/min, the compressed air pressure is more than or equal to 0.8Mpa, and the spraying distance is 120-180mm.
2. 2. The high hardness, wear resistant and corrosion resistant composite ceramic coating according to claim 1, wherein: The thickness of the high-hardness wear-resistant corrosion-resistant composite ceramic coating is 150-500 mu m.
3. 3. The high hardness, wear resistant and corrosion resistant composite ceramic coating according to claim 1, wherein: the purity of the pure titanium wire is more than or equal to 99.9%; The diameter of the pure titanium wire is 1.0-2.0mm.
4. 4. The high hardness, wear resistant and corrosion resistant composite ceramic coating according to claim 1, wherein: The speed of the servo motor for controlling the spray gun to move is 5-20mm/s in the horizontal direction, 5-15mm/s in the vertical direction and 5-10 s in single spraying time.
5. 5. A method for preparing a high hardness abrasion resistant corrosion resistant composite ceramic coating according to any one of claims 1 to 4, characterized by comprising the steps of: And fixing the pure titanium wire through a roller wire feeder, and spraying after the control panel is provided with spraying parameters to obtain the high-hardness wear-resistant corrosion-resistant ceramic coating.
6. 6. Use of a high hardness wear resistant corrosion resistant composite ceramic coating according to any of claims 1-4 for surface protection of service engineering equipment in marine environments.
7. 7. The use of the high-hardness wear-resistant corrosion-resistant composite ceramic coating according to claim 6 for surface protection of in-service engineering equipment in marine environments, wherein the in-service engineering equipment in marine environments comprises ships and offshore working platforms.
8. 8. Use of a high hardness wear resistant corrosion resistant composite ceramic coating according to any of claims 1-4 in a stealth functional coating.

Description

Method for preparing superhard wear-resistant coating by supersonic arc spraying technology and application Technical Field The invention belongs to the technical field of high-hardness wear-resistant coatings, and particularly relates to a method for preparing a titanium nitride/titanium dioxide superhard wear-resistant coating by using a supersonic arc spraying technology and application of the titanium nitride/titanium dioxide superhard wear-resistant coating. Background TiN 0.3 and TiN belong to group IV transition metal nitrides, have a mixed structure of metal bonds and covalent bonds, resulting in the characteristics of both metal crystals and covalent crystals. Has excellent characteristics in wear resistance, corrosion resistance, electricity and the like. The wear-resistant coating is widely applied to the fields of cutting tools, engineering equipment surface wear-resistant coatings, ocean engineering, electronic components and the like. The TiO 2 has higher hardness, good corrosion resistance and special electrical properties, so that the TiO 2 has wide application in corrosion-resistant and wear-resistant coatings, semiconductor industry and paint industry. Under a complex marine environment, engineering equipment and engineering components are not only corroded by corrosive ions in seawater, but also the surfaces of the equipment are eroded and damaged due to seawater movement, floating of inclusions in the seawater, swimming of fishes and microorganisms and the like. In tidal zones or on offshore engineering equipment surfaces with mutual friction pair contact wear, the wear is more severe. The abrasion corrosion part has mechanical property deterioration, and the surface has more easily-diffused defects, so that the performance of the abrasion corrosion part is rapidly deteriorated and is failed in advance. The supersonic electric arc spraying is used as a thermal spraying mode, and has the characteristics of simple spraying process, strong working condition adaptability, low spraying cost, flexible preparation of sprayed wires and the like. The method is widely applied to the preparation of functional coatings with wear resistance, corrosion resistance and the like. However, the principle of arc spraying determines that the sprayed wire can only be composed of conductive metal wires, so that a ceramic composite coating cannot be obtained by directly depositing ceramic raw materials. The powder core spraying wire solves the problem, and the designed mixed powder can be coated in the conductive metal tubule to realize the diversification of the spraying raw materials. However, the melting point, particle diameter, dispersibility, oxidation characteristics and the like of ceramic particles greatly affect the performance of the coating, powder particles are not melted sufficiently in spraying, atomization effect is poor, and molten drops are not completely dispersed in a matrix, so that defects of the coating are excessive, and the performance of each phase of the coating is affected. Therefore, by controlling parameters during spraying, it is an important research direction to obtain a corresponding high-performance ceramic coating by means of the mutual reaction of atomized metal particles during spraying. The behavior of high-speed high-temperature metal droplets in air is a complex and difficult-to-control process, and the spraying conditions are different, so that the products for generating the coating can be quite different. Disclosure of Invention In order to overcome the defects and shortcomings of the prior art, the primary purpose of the invention is to provide a high-hardness wear-resistant corrosion-resistant composite ceramic coating. The coating adopts pure titanium wires which are easy to purchase in the market as raw materials, adopts a supersonic arc spraying technology, and prepares the wear-resistant and corrosion-resistant ceramic composite coating on the surfaces of engineering equipment and material products such as common structural steel, aluminum alloy and the like by accurately adjusting spraying parameters. The invention further aims at providing a preparation method of the high-hardness wear-resistant corrosion-resistant composite ceramic coating. The invention also aims at providing the application of the high-hardness wear-resistant corrosion-resistant composite ceramic coating. The aim of the invention is achieved by the following scheme: A high-hardness wear-resistant corrosion-resistant composite ceramic coating is prepared from pure titanium wires through supersonic arc spraying, and the high-hardness wear-resistant corrosion-resistant composite ceramic coating is a TiN-TiO 2-TiN0.3 composite ceramic coating. Preferably, the high-hardness wear-resistant corrosion-resistant composite ceramic coating mainly comprises titanium nitride and titanium oxide, wherein the total proportion of the titanium nitride of the superhard phase exceeds 80%. Preferably, the main