Abstract
The two-phase TiC-34 vol%TiN-(7-14) vol% WC-7 vol%Co-3.5 vol%Ni alloys with different carbon contents were sintered in vacuum at 1500°C for 1 hr, cooled to room temperature and then annealed at temperatures ranged from 950 to 1250°C. It was found that the two-phase region of each alloy became narrower by the annealing, because of the precipitation of η or WC phases. The strength and cutting performance of the alloys affected by the annealing were examined. The reason why the alloys of as sintered state were not stable was in detail discussed.
