| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface coat boron nitride sintered body tool having superior working accuracy.SOLUTION: A surface coat boron nitride sintered body tool includes a cubic crystal boron nitride sintered body and a coated film formed on the cubic crystal boron nitride sintered body, the coated film includes A layer and C layer, the A layer is represented by TiMaCN(therein, Ma is one kind or more of Cr, Nb and W, xa is 0≤xa≤0.7, ya is 0≤ya≤1), the C layer is represented by AlCrMcN (therein, Mc is one kind or more of Ti, V and Si, xc is 0.2≤xc≤0.8, yc is 0≤yc≤0.6, and xc+yc is 0.2≤xc+yc≤0.8), the A layer is formed between the outermost surface of the coated film or between the outermost surface of the coated film and C layer, and a distance between the outermost surface of the coated film and an upper surface of the C layer is 0.1 to 1.0 μm. |
