Abstract
The effect of tantalum carbide or titanium carbide addition on the short-time creep-rupture strength of WC-Co alloy was studied at 700-900°C in relation to the carbon content, carbide grain size and the domain (or grain) size of binder phase of the alloy.
The results are as follows. At temperatures above about 800°C, the creep-rupture strength of tantalum carbide and/or titanium carbide contained alloys increased with increasing amount of those carbides. The observed increase in the creep-rupture strength of tantalum carbide contained alloy was found to be mainly due to the increased domain size, and that of titanium carbide contained alloy, due to the effect of increased strength of carbide skelton in addition to the increased domain size.
