Microstructure and Wear Behavior of Arc Sprayed WC-Co /FeCrB and WC-Ni /FeCrB Composite Coatings
Two type of ceramic composite coatings of Fe-Cr-B alloy reinforced with cobalt-coated tungsten carbide (WC-Co) particles or nickel-coated tungsten carbide (WC-Ni) particles were deposited on a mild steel substrate by arc spraying, respectively. The microstructure of the coating was investigated by optical microscopy. X-ray diffraction analysis was used to study the phase composition in the coating. The microhardness of the coating was determined. The wear behavior of the coating was evaluated. The results showed that the WC-Co/FeCrB coating has the excellent abrasive wear resistance which is about 11 times higher than that of Q235 mild steel. The main wear mechanism of both coatings was silica scratching and micro-cutting of the matrix and the resultant pulling out of WC particles.
M.K. Lei, X.P. Zhu, K.W. Xu and B.S. Xu
B. Y. Fu et al., "Microstructure and Wear Behavior of Arc Sprayed WC-Co /FeCrB and WC-Ni /FeCrB Composite Coatings", Key Engineering Materials, Vols. 373-374, pp. 468-471, 2008