| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool whose hard coating layer exerts excellent chipping resistance in high-speed intermittent cutting work of an alloy steel e.g..SOLUTION: A surface-coated cutting tool has a hard coating layer containing at least a layer composed of a complex compound of Ti, Al, B, C and N and coated by chemical vapor deposition. The layer composed of a complex compound of Ti, Al, B, C and N has an average composition of a composition formula TiAlBCN(where a, b, c and d are all by atom%; 30≤a≤50; 0<b<1; 0.05≤c≤0.5; and 45≤d≤55) and consists of TiAlBCN particles of an average particle width of 0.1-2 μm and an average aspect ratio of 5 or higher and Ti boride particles present around the TiAlBCN particles. |
