| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cutting tool which exhibits an excellent chipping resistance for a long period of use in a rolling cutting work of heat resistant alloy such as Ni-based alloy, Co-based alloy, and the like. <P>SOLUTION: In the cutting tool formed with WC-based cemented carbide, the content of Co as a binding phase component is 4 to 12 mass%. In the binding phase, 3-20 mass% of solid Re is soluble. On a surface of a WC particle of a hard phase, a diffusion thin layer of Re is formed. The diffusion thin layer is formed throughout an area of depth of 1-10% in terms of a particle diameter from the surface of the WC particle. The content of the solid soluble Re in this area is 0.2-7 mass%. As components of the cemented carbide, VC, Cr<SB POS="POST">3</SB>C<SB POS="POST">2</SB>, TiC, TaC and NbC are included as required. Otherwise, a hard coating layer is deposited on the surface of the cutting tool. <P>COPYRIGHT: (C)2012,JPO&INPIT |
