| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting insert made of a TiCN (titanium carbonitride)-based cermet exerting wear resistance and excellent in finished surface processing indicating maintainability of dimensional accuracy and finished surface roughness of a workpiece.SOLUTION: There is provided a cutting insert made of a titanium carbonitride-based cermet obtained by sintering a molded body having a blending composition comprising by mass: 25-30% WC, 4-8% one or total of both of TaC and NbC, 1-5% MoC, 0.5-1.0% CrC, 8-14% total of Co and Ni, and 45-55% TiCN. The cutting insert made of the titanium carbonitride-based cermet is excellent in finished surface processing. In the insert, the content ratio of Co and Ni: Co/(Co+Ni) is 0.6 to 0.9, and the content ratio Cr/(Co+Ni) of Cr to the sum of Co and Ni is 0.04 to 0.08.SELECTED DRAWING: None |
