| 摘要 |
A multiple-region hardmetal tool piece (10). The tool piece includes a hardmetal body (12) including a hard particle component and a binder; an additional body, the additional body including a hardmetal body (14) having a hard particle component and a binder; a metal body or a ceramic body; a substantially discontinuous gradient-free boundary layer between the hardmetal body and the additional body; and a mating surface (16) between the hardmetal body and the additional body. In the preferred embodiment, the hard particle components are a carbide, such as tungsten carbide. In the preferred embodiment, the mating surface (16) includes a male portion (20) on one of the bodies and a corresponding female portion (22) on the other of the bodies. The mating surface (16) is symmetrical or asymmetrical and, in the preferred embodiment, the mating surface is axially symmetrical, such as a dimple. The mating surface may further include both micro and macro mating features. |
