TiB2-Co cermet composite powder was fabricated by mechanical alloying process and TiB2-Co coating was prepared by means of high velocity oxy-fuel(HVOF)method.The microstructure characteristics of coatings were observed by scanning electron microscopy(SEM),whilst microhardness,abrasive wear and wear morphology of TiB2-Co coating were tested to evaluate the properties of the coating.The results show that there are completely melted zones and partially melted zones on the coating surface.The coating has a typical layered structure and is well combined with the 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.The wear loss weight is only 1/4 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.
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