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采用超音速火焰喷涂工艺制备了Cr_3C_2-25%NiCr陶瓷,对涂层的组织结构、显微硬度及在滑动摩擦条件下的失重进行了分析,得出了涂层摩擦因数与时间的关系,对涂层的滑动摩擦磨损机理进行了分析。结果表明Cr_3C_2-25%NiCr涂层致密,孔隙率为0.96%,涂层截面的显微硬度平均值HV_(0.3)为867。涂层稳定的摩擦因数为0.1。初始阶段涂层的磨损主要是磨屑对涂层的磨粒磨损作用,摩擦稳定后涂层的磨损主要是由于相对运动面的磨削作用。
The Cr 3 C 2-25% NiCr ceramic was prepared by supersonic flame spraying process. The microstructure, microhardness and weight loss of the coating were analyzed. The relationship between coating friction coefficient and time was obtained. The sliding friction and wear mechanism of the coating was analyzed. The results show that the Cr_3C_2-25% NiCr coating is dense and the porosity is 0.96%. The average microhardness HV_ (0.3) of the coating cross section is 867. The coating has a stable friction factor of 0.1. In the initial stage, the abrasion of the coating is mainly abrasive wear effect of the coating on the coating. The wear of the coating after the friction is stable is mainly due to the grinding effect of the relative movement surface.