| 摘要 |
A surface coated cutting tool comprises a substrate and a hard layer formed on the surface of the substrate, and a contact angle of water theta on the rake face of the hard layer is in the range of 30 to 80°. A surface coated cutting tool comprises a substrate and a hard layer formed on the surface of the substrate, and a contact angle of water theta<SUB>R </SUB>on the rake face of the hard layer and a contact angle of water theta<SUB>F </SUB>on the flank face of the hard layer have a relation of theta<SUB>R</SUB><theta<SUB>F</SUB>. Thereby, excellent resistance to wear and fracture can be shown, leading to a excellent surface coated cutting tool.
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