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High velocity oxy-fuel (HVOF) is a coating technique of thermal spray process usually employed for protecting the substrate, where high velocity is used instead of high temperature for coating the substrate. In this paper, the wear behaviour of tungsten carbide-cobalt (88WC-12Co) coating was studied experimentally. The coating of 0.3 mm was deposited by HVOF technique on SS202 substrate. The dry abrasive wear experiments were carried out using pin-on-disc test rig at fixed sliding velocity 0.603 m/s, and 20, 40, 60 N load for 1000 m distance. The weight loss was measured at each 250 m distance. For the preparation of abrasive surface 80 grit SiC (silicon carbide) emery paper was used. Results show that at initial stage wear rate of coated substrate was high which reduces with increase in sliding distance and linear increment in coefficient of friction with increase in load.

Investigation of tribological behaviour of 88WC-12Co coating