| 摘要 |
PURPOSE: To provide 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 milling operation whose fine structure comprises hard constituents with undissolved Ti(C,N) cores (A) and contains Ti, Nb, W, C, N and Co, the alloy further comprises 9 to 14 at.% of Co, 1 to less than 3 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 the 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 10 to 13 at.% of Co, wherein the alloy contains 1.5 to 2.5 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.
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