SINTERED TITANIUM-BASED CARBO NITRIDE ALLOY CONTAINING Ti, Nb, W, C, N, AND Co FOR SUPERFINISHING WORK AND ITS MANUFACTURING METHOD

摘要

PURPOSE: Provided is a cermet material with substantially improved wear resistance while maintaining toughness and resistance to plastic deformation on the same level as state-of-the-art cermets. CONSTITUTION: In a titanium based carbo nitride alloy for superfinishing operation comprising hard constituents with undissolved Ti(C,N) cores (A) and containing Ti, Nb, W, C, N and Co, the alloy further comprises 3 to less than 9 at.% of Co, 2 to less than 4 at.% of Nb, 3 to 8 at.% of W, C and N having a C/(N+C) ratio of 0.50 to 0.75, and Ni and Fe as impurities except Ti, wherein an amount of undissolved Ti(C,N) cores is 26 to 37 vol.% of the hard constituents and the balance being one or more complex carbo nitride phases (B), wherein the alloy contains 5 to less than 9 at.% of Co, wherein the alloy contains 3 to less than 4 at.% of Nb, wherein the alloy contains 3 to 4 at.% of W, and wherein the amount of undissolved Ti(C,N) cores is 27 to 35 vol.% of the hard constituents, the balance being one or more complex carbo nitride phases.