Wear-resistant composite spraying micropowder and wear-resistant composite coating and preparation method thereof

Abstract

The invention provides abrasion-resistant composite spraying micro-powder. The abrasion-resistant composite spraying micro-powder comprises, by mass, 27%-60% of cubic boron nitride composite micro-powder, 1-3% of metal abrasion-resistant additives and 37-70% of Co micro-powder, wherein the metal abrasion-resistant additives are composed of Cr micro-powder and Mo micro-powder, the mass ratio of the Cr micro-powder to the Mo micro-powder is 3-5:1, and the mass percentage of titanium in the cubic boron nitride composite micro-powder is 3-8%. The invention further provides a preparation method of the abrasion-resistant composite spraying micro-powder and an abrasion-resistant composite coating prepared from the abrasion-resistant composite spraying micro-powder, the preparation method is simple in process, and automatic production can be achieved easily. The abrasion-resistant composite coating has excellent abrasion resistance and is highly bonded with a matrix, and the service life of workpieces coated with the abrasion-resistant composite coating is prolonged.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a wear-resistant composite spraying micropowder, a wear-resistant composite coating and a preparation method thereof. Background technique [0002] In the industrial manufacturing industry, many workpieces cause surface failure due to local wear and corrosion on the surface, such as the wear of die steel, the wear of steel plates in the mining and metallurgical industry, the wear of the inner wall of the pipeline in thermal power plants, the blades of wind turbines, For building material crushing equipment, etc., due to the surface wear and corrosion of the workpiece, the equipment must be repaired frequently or even scrapped directly, resulting in huge economic losses. In the prior art, thermal spraying or electroplating is usually used to coat a layer of superhard wear-resistant layer such as diamond, cubic boron nitride and other materials on the surface of the workpiece, but...

AI Technical Summary

Problems solved by technology

[0002] In the industrial manufacturing industry, many workpieces cause surface failure due to local wear and corrosion on the surface, such as the wear of die steel, the wear of steel plates in the mining and metallurgical industry, the wear of the inner wall of the pipeline in thermal power plants, the blades of wind turbines, Building material crushing equipment, etc., will often be repaired or even scrapped directly due to surface wear and corrosion of the workpiece, resulting in huge economic losses

In the prior art, thermal spraying or electroplating is usually used to coat a layer of superhard wear-resistant layer such as diamond, cubic boron nitride and other materials on the surface of the workpiece, but due to the gap between a single diamond, cubic boron nitride and the substrate Poor wettability leads to weak bonding between the coating and the substrate. At the same time, in the thermal spraying process, a single cubic boron nitride micropowder is prone to phase change, and it is difficult to form a tightly bonded interface with the substrate, which directly affects the coating. performance