Effect of CeO_2 on Structure and Corrosion Resistance of Ni/WC Cladding Layer
Ni60+Ni/WC composite alloy coatings on 45 steel were prepared by laser cladding technology.The influences of CeO2 contents and laser power on the microstructure,crack,microhardness and corrosion resistance were studied.The results show that the microstructure of laser coatings is greatly refined and the cracks is obviously reduced or even vanished by addition of proper amount of CeO2.The corrosion resistance of the coatings with proper amount of CeO2 is better than that of the coatings without CeO2 and is much better than steel 0Cr18Ni9.