| 摘要 |
PROBLEM TO BE SOLVED: To provide a hard material superior to cemented carbides in terms of high-temperature plastic deformation resistance and superior to Co-based heat-resistant alloys in terms of low-temperature hardness and a method for manufacturing the same as well as a cutting tool and a frictional agitation joining tool each using the same hard material.SOLUTION: The provided hard material includes a first hard phase (first hard phase particles 10A) and, if necessary, a binder phase 20 including an iron group metal. This first hard phase comprises a core 11 consisting of WC and a shell 12 constituted by a Co-based heat-resistant alloy and coating the core 11. As a second hard phase (second hard phase particles 10B), furthermore, it is also permissible to include a compound of at least one type of metal element selected from the group consisting of Group 4, 5, and 6 elements of the periodic table and at least one type of element selected from between C and N. A hard material having an excellent plastic deformation resistance can be provided since the shell 12 consists of the Co-based heat-resistant alloy. |
