| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating tool in which a hard coating layer is excellent in hardness and tenacity, and capable of exhibiting chipping resistance and defect resistance over use in long period. ! SOLUTION: A hard coating layer includes a composite nitride or composite carbonitride layer expressed by a composition formula: (Ti1-x-yAlxMey)(CzN1-z)(in which, Me is one element selected from Si, Zr, B, V, and Cr) and an average content ratio Zav (Xav, Yav, Zav: atom ratio) of Al average content ratio Xav, Me average content ratio Yav, and C average content ratio Zav satisfies 0.60≤Xav≤0.95, 0.005≤Yav≤0.10, 0≤Zav≤0.005, Xav+Yav≤0.955, the layer includes at least cubic crystal grains, and average particle width W of the cubic crystal grain is 0.05-1.0 μm and an average aspect ratio A is equal to or less than 5 in a granular structure, and there is density change with predetermined periods of Ti, Al, and Me in the cubic crystal grains. ! COPYRIGHT: (C)2015,JPO&INPIT |
