Wear resistance of hypereutectic Fe–Cr–C hardfacing coatings with <i>in situ</i> formed TiC

Abstract

With excellent wear resistance, hypereutectic Fe–Cr–C coatings have caused great attention in the field of surface engineering. In this study, the hypereutectic Fe–Cr–C hardfacing coatings with certain amounts of titanium (Ti) additives were further developed. The precipitation of the carbides in the coatings was calculated. The microstructure of the coatings was observed and the phase structure of the coatings was determined. Besides, the wear resistance of the coatings was also measured. The experimental results show that the microstructure of the coatings mainly consists of primary (Cr,Fe) 7 C 3 carbide and eutectic matrix. With increasing Ti additive, the primary carbide is refined, which in turn improves the wear resistance of the coatings.