Microstructure and Performance of WC-17Co Coatings Fabricated by High Velocity Oxy-fuel Spraying

Different structural WC-17Co coatings were deposited by high velocity oxy-fuel(HVOF) spraying.The properties of the two coatings were tested,and the effect of WC size on the performance of the coatings was investigated.The results indicated that G coating,which had submicron WC particle,showed more advantages in hardness,porosity,and fracture toughness,while H coating with bigger WC particle had excellent performance in adhesive strength and corrosion resistance.Obviously,the WC particle size showed great influence to the coating properties.