| 摘要 |
PURPOSE: To provide a coated cemented carbide alloy cutting tool having hard coating layers excellent in interlayer adhesion. CONSTITUTION: In a coated cemented carbide alloy cutting tool, the surface of a cemented carbide alloy base body comprises a first layer, TiN layer with granulated crystal structure, a second layer, TiCN layer with longitudinal growth crystal structure, a third layer, TiCO or TiCNO layer with granulated crystal structure, and a forth layer, Al2 O3 with structure mainly comprising copper type granulated crystal, and in addition, a fifth layer, TiN layer with granulated crystal structure when necessary. In addition, a hard coating layer, in which at least W and Co out of the components composing the base body of the grain boundaries of the first and second layers are diffusively contained, has layer thickness of 3 to 30μm in average.
|
