HARD ALLOY AND METHOD OF ITS PRODUCTION Russian patent published in 2001 - IPC

FIELD: powder metallurgy; applicable in manufacture of various metal working tools. SUBSTANCE: hard alloy containing titanium nickelide has titanium carbide as hardening phase, and additionally Fe and/or Co, and/or Ni as elements reducing temperature of martensite conversion, and Pd and/or Pt, and/or Au as elements increasing temperature of martensite conversion, and cu and/or Mo as elements increasing damping capability in martensite conversion with the following ratio of components, wt.%: titanium nickelide, 5.0-50.0; Fe and/or Co, and/or Ni, 0.1-4.0; Pd and/or Pt, and/or Au 2.0-20.0; Cu and/or Mo, 1.0-8.0; titanium carbide, the balance. Method of producing hard alloy includes preparation of charge, molding of casting, sintering and subsequent heat treatment. In so doing, prior to casting molding, introduced into charge are alloying elements. After sintering, casting is saturated with melt of titanium nickelide at temperature of 1280-1350 C in vacuum. Heat treatment is carried out by diffusion annealing at temperature of 700-900 C in vacuum for 1-6 h. EFFECT: production of hard alloy featuring high strength, ductility and impact strength. 3 cl, 1 tbl