| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface coated thermet-made cutting tool having a hard coating layer exhibiting excellent chipping resistance in intermittent heavy cutting. SOLUTION: In this surface coated thermet-made cutting tool, a hard coating layer is vapor-depositioned on the surface of a tool base made of WC-base cemented carbide or TiCN-base thermet. The hard coating layer has a (Ti, Al)N layer, which satisfies the composition formula: (Ti<SB>1-X</SB>Al<SB>X</SB>)N (wherein X indicates 0.45 to 0.70 by atomic ratio), shows a specified inclination angle frequency distribution graph when electron beams are applied to individual crystal grains having a cubic crystal lattice existing within a measurement range of surface polishing surface using a field emission type scan electronic microscope to measure an angle of inclination made by normal of [100] face which is a crystal face of the crystal grain to the normal of the surface polishing surface, and has an average layer thickness of 2 to 15μm. COPYRIGHT: (C)2006,JPO&NCIPI
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