Technology

WC Coating Technology

The thermally sprayed cemented carbide layer was successfully modified using new diffusion bonding technique. The defects in the cemented carbide layer disappeared and the hardness of the cemented carbide layer increased to ~2000 HV, which was about 1.5 times higher than that of the as-sprayed cemented carbide layer. Additionally, the cemented carbide layer was bonded to the SKD61 substrate by diffusion of the metallic elements.

Figure Microhardness horizontal profiles of the cross-section of the as-sprayed and the treated WC-CrC-Ni layer.