Abstract
High temperature transverse-rupture strength (T.R.S.) of WC-10%Co medium carbon alloys affected by the addition of several carbides such as TiC, V4C3, Cr3C2, ZrC, NbC, Mo2C, HfC was studied mainly at 1000°C. The amount of each addition-carbide was controlled to be generally 5 mol% in the binder phase.
It was found that T.R.S. of WC-Co alloy at 1000°C increased by the addition of these carbides, especially by ZrC. The adequate amount of ZrC was found about 3 mol% in the binder phase, considering the room temperature T.R.S. The increase in strength by ZrC addition was thought to be due to the improvement in the strength of domain (or grain) boundary of the binder phase.
