| 摘要 |
PROBLEM TO BE SOLVED: To provide cemented carbide having excellent chipping resistance and used for a cutting tool, a sliding member, a wear resistant member or the like. SOLUTION: The cemented carbide is obtained by binding tungsten carbide and a hard phase composed of at least one kind of the carbide, nitride and carbonitride (except tungsten carbide) of at least one kind selected from the group consisting of the group 4a, 5a and 6a metals in the Periodic Table in 0 to 30 mass% with a binder metal composed of 2 to 20 mass% cobalt (Co). In the surface of the cemented carbide, the cobalt is composed of mixed crystals of cubic cobalt and hexagonal cobalt. Further, regarding the peak of the cobalt in an X-ray diffraction pattern, provided that the (111) plane peak intensity of the cubic cobalt is defined as I<SB>c</SB>and the (101) plane peak intensity of the hexagonal cobalt as I<SB>h</SB>, in the surface of the cemented carbide, the relation of 0.05≤I<SB>hs</SB>/(I<SB>hs</SB>+I<SB>cs</SB>)≤0.3 is satisfied. COPYRIGHT: (C)2006,JPO&NCIPI
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