HARD SINTERED COMPACT FOR TOOLS

摘要

A hard sintered compact for tools is a sintered compact obtained by super-high pressure sintering of 45 75% by vol. of cubic boron nitride powder and the remaining proportion of binder powder. The binder includes 5 - 25% by wt. of A? and a balance of at least one compound represented by (Hf1-z Mz) C (where M denotes an element of group IVa, Va or VIa of the periodic tablet other than Hf, and the relationship 0 ? z ? 0.3 is satisfied). As a result of this composition, improvements in strength, wear resistance and heat resistance are achieved, and a hard sintered compact for tools having excellent strength and excellent wear resistance can be obtained.