| 摘要 |
In a surface-coated boron nitride sintered body tool, at least a cutting edge portion contains a cubic boron nitride sintered body and a coating layer (10) formed on a surface of the cubic boron nitride sintered body. A layer B (30) of the coating layer (10) is formed by alternately laminating one or more layers of each of two or more compound layers (31, 32) having different compositions. Each of the compound layers (31, 32) has a thickness not less than 0.5 nm and less than 30 nm. |
