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用Ｓ~＋、Ｍｏ~＋Ｓ~＋＋Ｍｏ~＋注入动压轴承用材料ＷＣ－Ｎｉ表面，在未经退火处理条件下，其表面显微硬度有不同程度的提高。而在经过退火处理后，其表面显微硬度都在不同程度上有显著地下降。注入辐照损伤和注入层硫化物的形成是注入表面显微硬度提高和降低的主要原因和机理。同时，Ｓ~＋和Ｓ~＋＋Ｍｏ~＋注入在未经退火和退火处理条件下，其摩擦系数都在不同程度上有着明显地下降。特别是ｓ~＋Ｍｏ~＋注入在３３０℃保温６ｈ退火条件下，其摩擦系数显著地下降到了０．１左右。而Ｍｏ~＋注入在未经退火和３３０℃保温６ｈ退火条件下，其摩擦系数亦有明显地下降。但在６００℃保温６ｈ退火条件下，其摩擦系数却显著地上升。注入层硫化物的形成和注入辐照损伤使得注入试样表面和ＧＣｒ１５钢球摩擦副之间的粘着摩擦得到改善是摩擦系数下降的主要原因和机理。
The WC-Ni surface of hydrodynamic bearing material was filled with S ~ +, Mo ~ + S ~ + + Mo ~ +. The surface microhardness of the bearing was improved to some extent without annealing treatment. After the annealing treatment, the surface microhardness is significantly reduced to varying degrees. The main reason and mechanism of the increase and decrease of the microhardness of the implanted surface are the formation of infiltrated and implanted sulfide. At the same time, the friction coefficients of S ~ + and S ~ ++ Mo ~ + implanted without annealing and annealing have obviously decreased. In particular, the s ~ + Mo ~ + implanted at 330 ℃ for 6h annealing conditions, the friction coefficient significantly decreased to about 0.1. The Mo ~ + implanted without annealing and annealing at 330 ℃ 6h annealing conditions, the friction coefficient also decreased significantly. However, at 600 ℃ for 6h annealing conditions, the friction coefficient increased significantly. The formation and injection of sulfide in the injection layer irradiation damage caused by the adhesion between the sample surface and GCr15 steel ball friction is improved friction coefficient decreases the main reason and mechanism.