| 摘要 |
PURPOSE:To obtain a high strength sintered alloy having superior toughness and wear resistance and suitable for wear resistant tool parts, by using a TiN- contg. hard phase contg. a first hard phase having each core of TiN coated with a shell of a mutual solid soln. of two or more kinds of compds. selected among the carbides and nitrides of the groups IVa, Va and VIa metals in the periodic table. CONSTITUTION:A high strength sintered alloy of this invention is composed of 75-95wt% hard phase consisting of TiN and one or more kinds of components selected among the carbides and nitrides of the groups IVa, Va and VIa metals in the periodic table and mutual solid solns. of such compds. and the balance Co and/or Ni-base binding phase. The hard phase contains 0.5-5vol% first hard phase having each core of TiN coated with a shell of a mutual solid soln. of two or more kinds of compds. selected among the carbides and nitrides of the groups IVa, Va and VIa metals in the periodic table. When wear resistant tool parts or cutting tool parts are made of the high strength sintered alloy in place of a conventional sintered alloy such as a sintered hard alloy or cermet, the service life can be remarkably prolonged. |
