Abstract:TiB2 -Co cermet composite powder was fabricated by mechanical alloying process and TiB2 -Co coating wasprepared by means of high velocity oxygen fuel method.The microstructure characteristics of coatings were observed by scanning electron microscopy (SEM), whilst microhardness, abrasive wear tests were performed and wear morphology were observed the coatings to evaluate their performance.Research results show that there are completely melted zones and partially melted zones on the coating surface.The coating has a typical layered structure and have excellent combination with substrate。The hardness of the coating is significantly higher than that of the base metal, which is 4.5 times that of the base metal. Wear loss weight is only 1/4 of the wear loss weight of the base metal.There are cavities and furrows on the surface of the coating wear sample. The wear mechanisms are mainly adhesive wear and abrasive wear.