: In this study, high-velocity oxygen-fuel (HVOF) process was applied to create a composite coating on the surface of carbon steel samples. The effect of WC addition on properties of HVOF sprayed Stellite6-WC coatings was investigated. For this various amounts of WC powder 0%, 10%, 20% and 30% were mixed with Stellite6 powder for 1 hours. Then powders deposited on St 37 steel substrate with HVOF method. Evaluation of microstructure and properties of obtained composite coatings was done by X-ray diffraction (XRD), optical and scanning electron microscope (SEM), elemental microanalysis (EDS) and microhardness testing methods. Vickers micro hardness test was used to evaluate the hardness of coatings. Cyclic oxidation test in 350, 450 and 550 for 30 hours were performed to probe the oxidation resistance of coatings. Also, the pin-on-disk test with 40N load and 1000 m sliding distans at 25 was used to cold wear resistance assessment of coatings. The rsults indicated that the Stellite6-30%WC exhibits maximum wear resistance. Further more, the Stellite6 coating exhibited high prosity (2%), but Stellite6-30%WC has the lowest prosity of all. High temperature oxidation test indicated that Stellite6 exhibits the best behaviour incomparision to other samples. According to wear experiments, the dominant wear mechanism was abrasive and adhesive for Stellite6 and Stellite6-WC composit coatings, respectively. Keywords : Stellite6-WC composite, HVOF process, high temperature oxidation, wear
