Bearing steel ball surface lubricating coating process

The invention provides a bearing steel ball surface lubrication coating process, and relates to the field of steel ball surface lubrication processes. The bearing steel ball surface lubricating coating technology comprises the steps that S1, an anode layer ion source is adopted for cleaning the surface of a metal ball, and mixed gas of argon and hydrogen is adopted for removing and reducing impurities and oxides; when the temperature is lower than 300 DEG C, Ag can provide enough lubricating capacity, and when the temperature is higher, Mo is oxidized in a 700 DEG C high-temperature friction environment and an air environment, MoO3 serves as a main lubricating component, and the TaC coating serves as a main hardness supporting layer and a wear-resisting layer. The high-power pulse magnetron sputtering technology is adopted, so that the bonding strength and compactness of the coating can be greatly improved, the defects are few, the roughness is low, the wear resistance of the steel ball can be improved, the s