Research Progress on Friction Reduction Modification of Automotive Lightweight Valve Materials

With the continuous development of the automotive industry,the requirements for automotive performance as well as energy saving and emission reduction are getting higher and higher.As an important part of the engine,valves have a significant impact on engine efficiency and greenhouse gas emissions. The harsh working environment inside the engine requires the lightweight valve materials to have good wear resistance.The application of commonly used surface technologies,including physical reinforcement,chemical heat treatment,laser surface technology,surface thermal spraying and other technologies,was analyzed to improve the wear resistance of lightweight valve materials,and finally,the suggestions on some problems faced by the development of friction reduction applications of lightweight materials for valves in the future were put forward.