Abstract: WC92Co8 coating produced by electrospark deposition effectively improves the surface performance of the substrate. The behavior of the interface between the WC92-Co08 coating and the substrate is studied. The high- melting-point WC92-Co08 is deposited onto the surface of Ti alloy, and the coating is usually more than 50 mm thick. The surface of the coating is mainly composed of TiC and W2C besides a small amount of W, and its micro hardness reaches 1 129 HV.The coating dramatically improves the performance of the substrate.

Key words: Electrospark deposition, Interface behavior, WC92Co8