The effect of the indenter materials (dense cubic boron nitride DBN and synthetic diamond) during friction processing (medium - air, indenter load - 500 N, five-fold scanning of the surface with an indenter) of a NiCrBSi-CrC composite coating formed by laser cladding on the surface quality and micromechanical properties is studied. The characteristics after machine grinding were also compared. As a result of frictional treatment with indenters made of various materials, the nickel matrix is deformed, with large primary chromium carbides CrC particles protruding above the surface. Treatment with a DBN indenter, implemented with a higher coefficient of friction, more effectively reshapes the nickel matrix under frictional loading, leading to partial destruction of chromium carbides on the surface. Frictional treatment with a cubic boron nitride indenter results in an increase in microhardness up to 960 HV, and contributes, according to microindentation results, to a more significant increase in the resistance of the surface layer of the coating to elastic and plastic deformation compared to treatment with a synthetic diamond indenter.
Soboleva et al. (Wed,) studied this question.