Working in aggressive environmental conditions and the interaction of friction pairs place increased demands on modern parts used in the aircraft-engine industry, electric-power industry, and medicine. Often, working in such conditions leads to premature failure of parts and equipment, as well as energy losses due to friction and wear processes. Modern technologies for surface modification and coating by various methods can improve the performance of such parts. The technology of laser surfacing of wear-resistant coatings in combination with preliminary surface modification makes it possible to create a protective layer on the surface and strengthen it. This article provides an overview of modern methods of surface modification and protective coating using various physical technologies, highlighting their advantages and disadvantages. The most promising method is laser surfacing of wear-resistant coatings with preliminary surface modification. An algorithm of the laser surfacing process has been developed for this technology. It is proposed to use a new wear-resistant coating of powder materials based on chromium and molybdenum carbides. The effect of the mixture composition on the properties of the synthesized coating is determined. The adhesive strength and thickness of the coating were evaluated.
Peretyagin et al. (Sun,) studied this question.