| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool having a hard coating layer exhibiting excellent resistance to chipping and abrasion resistance. SOLUTION: The surface-coated cutting tool has the hard coating layer formed with an entire average layer thickness of 5-15 μm on the surface of a tool body, wherein the coating layer is structured of (a) to (d) including: (a) as an underlying layer, a titanium nitride layer with an average layer thickness of 0.2-1 μm and a titanium carbide layer with an average layer thickness of 1-3 μm having a longitudinally growing crystalline structure; (b) as an adhesion layer, a titanium carbide layer with an average layer thickness of 0.2-1 μm having a fine longitudinally growing crystalline structure; (c) as an intermediate layer, a Ti compound layer with an average layer thickness of 3-8 μm containing at least a titanium carbonitride layer with an average grain size of 0.05-0.5 μm having a longitudinally growing crystalline structure formed adjacent to the adhesion layer; and (d) as an upper layer, an aluminum oxide layer with an average layer thickness of 0.5-5 μm. COPYRIGHT: (C)2010,JPO&INPIT
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