Abstract:The new TiC-30NiCr coating is prepared by supersonic flame spraying process. The phase structure, microstructure and frictional wear behavior of the coating are systematically characterized, and the wear resistance performance of this coating is compared with the traditional WC-CoCr coating. The research finds that during thermal spraying, TiC decarbonization was converted into Ti8C5 phase, and the vast majority of Cr solidified in Ni phase. During reciprocating friction and with the conditions of frictional heat, monomorphic Cr oxidizes and a small amount of silicon nitride frictional sub-friction chips are embedded in the Ni(Cr) bonding phase. Under friction stress, the expansion of fatigue cracks between layers, titanium carbide and Ni(Cr) phase interface cracking are the main reasons of large areas peeling of TiC-NiCr coatings. Although the TiC-NiCr coating is less hard and wear resistant than conventional WC-CoCr coatings, it will have important application prospects in special environments which the costs are low, the environment is friendly, and the wear resistance is excellent.