| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting tool having long service life in cutting a hard-to-cut material. SOLUTION: This cutting tool is made of a cemented carbide formed by binding a hard phase including tungsten carbide and one of the carbide, nitride, and carbonitride of group 4, 5, 6 metals to each other with a binding metal made of at least one of iron group metals. The surface of the cemented carbide has aβphase formed of the solid solution of one of the carbide, nitride, and carbonitride including at least one of Ti, Ta, Nb, and Zr and W. Since cavities are present in theβphase, the chipping and the elastic deformation of the edge of the cutting tool can be reduced. COPYRIGHT: (C)2008,JPO&INPIT
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