| 摘要 |
A process for producing titanium nitride base cermet with a high toughness comprises the steps of: admixing 0.5 to 10 parts by volume of a carbon powder with a cermet material powder in an amount of 100 parts by volume based on nitrides in the cermet material powder, the cermet material powder essentially consisting of, by weight, 40 to 93% TiN, 2 to 15% of one or more selected from the group consisting of metals of the Group VIa of the periodic table and carbides thereof, 4.7 to 35% of iron group metal, and 0.3 to 10% of AlN with the balance being inevitable impurities, compacting and sintering whereby when the compact is sintered, said AlN is substantially decomposed. TiN may be partly replaced with carbides and/or carbonitrides of metals of the Groups IVa and Va of the periodic Table.
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