| 摘要 |
A hard alloy suitable for use in cutting tools, which exhibits excellent wear and fracture resistance, is disclosed. The hard alloy includes a hard dispersed phase and a binder metal phase, and the binder metal phase is constructed so that compressive stress, preferably of no less than 98 MPa (10 kgf/mm2), is retained therein. The hard alloy may be a cermet which includes a hard dispersed phase of at least one compound of titanium carbonitride and composite carbonitrides of titanium with at least one element of tantalum, tungsten, molybdenum, niobium, vanadium, chromium, zirconium or hafnium, and a binder metal phase of one or more of cobalt, nickel, iron and aluminum. The hard alloy may also be a cemented carbide in which the hard dispersed phase contains tungsten carbide and, optionally, one or more components of carbide, nitride and carbonitride which contains at least one of titanium, tantalum, molybdenum, niobium, vanadium or chromium, and in which the binder metal phase contains one or more metals of cobalt, nickel, iron and aluminum.
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