Preparation and Wear-resistance of WC-10%Co Laser Cladded Layer

WC-10%Co composite powders were prepared by electroless plating to improve the properties of the WC-Co laser cladded layer.The stereoscopic microscope (SM) and scanning electron microscopye (SEM) were used to study the morphology of the WC-10%Co layers cladded by different laser cladding process parameters.The effects of laser cladding processing parameters on the microstructure and properties of the laser cladded layer were discussed.The results show that the metallurgical bonding formed between the WC-10%Co composite layer and the steel substrate when the laser processing parameters were as followes:the laser beam power of 2.0 or 2.4 kW,beam traverse velocity of 4.1 or 8.2 m·min-1 and the beam diameter of 3 mm.The wear resistance of the laser cladded layer is improved greatly.