Research Progress of Wear-Resistant and Self-Lubrication Coatings Prepared on Titanium Alloy Surface by Laser Cladding

The low hardness and poor wear resistance of titanium alloy severely restrict its service life under friction conditions. Wear-resistant and self-lubricating coatings prepared on titanium alloy surface by laser cladding technology can greatly improve its wear resistance. In this paper, firstly, the influences of laser cladding technology(laser power, scanning velocity, spot diameter, specific energy, post-heat treatment, high frequency vibration, etc.) on the wear resistance of the coatings were reviewed. And then, the characteristics of different types of hard phases, matrix phases and self-lubricating phases as well as their influences on the wear resistance of the coatings were discussed. Finally, the wear-resistant and self-lubricating coatings prepared on the surface of titanium alloy by laser cladding were summarized and prospected.