Abstract
Effect of nitrogen addition on some basic properties of WC-β-Co (β; WC-TiC solid solution) alloy was studied. Effect of tantalum carbide addition on the mechanical properties of nitrogen free or contained WC-β-Co alloy was also studied.
It was found that the grain size of carbonitride in the nitrogen contained WC-β-Co alloy became finer almost independently of TaC addition; the strength of those alloys was somewhat lowered by the poreformation caused by denitrification; however, the strength of hot-isostatically pressed alloy was extraordinarily increased; the hardness of alloys inclined to decrease to some extent. The three-phase region of the nitrogen contained WC-β-Co alloy was examined.
