| 摘要 |
PURPOSE:To develop a titanium nitride cermet for cutting tools excellent in wear resistance, by mixing an Mo2C powder and respective powders of Ni and Co as metals for binding phase at the time of sintering with a powder of a TiC-TiN-WC-TaC solid solution in a specific ratio and then by subjecting the resulting powder mixture to press compacting and sintering. CONSTITUTION:70-80wt.%, of powder of quaternary solid solution having a composition consisting of 50-60% TiC, 10-30% TiN, 10-30% WC, and 5-15% TaC, 10-20% of powder of Co and Ni as binding phase-forming metals at the time of sintering in the mixing ratio of Co to Ni of 1:(0.8-1.2), and 5-20% of powder of Mo2C for improving wettability between the above- mentioned two kinds of powders are mixed. This powder mixture is compacted and then sintered in vacuum at 1,360 deg.C for 1hr, so that a cermet excellent in pitting and wear resistance and suitable for cutting tools can be manufactured.
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