WC-Ni系硬質皮膜の機械的特性に及ぼすプロセス条件の影響

抄録

Tungsten carbide (WC) materials, normally constructed by combination of WC and Co as binder phase, are widely used for cemented carbide cutting tools. Whereas the problem to form brittle phases due to the production process was reported on WC-Co coatings fabricated by thermal spraying.

The authors have shown that WC-Ni hard coatings can be formed by a combined wet plating and gas carburizing method instead of thermal spraying. However, the mechanism of WC formation in this process and the effect of microstructure on mechanical properties are still unclear. In this study, specimens were prepared by using a combined wet plating and gas carburizing method under different process conditions. Various analyses, observations, and mechanical property evaluations were carried out on those specimens.