METHOD OF PRODUCING OF MOLDED ARTICLES FROM TITANIUM NICKELIDE-BASED ALLOY

摘要

FIELD: metallurgy.SUBSTANCE: invention relates to manufacturing of titanium nickelide-based alloys used for medical implants. Method of manufacturing of molded articles involves remelting of metal of the semi-finished product by induction centrifugal melting in karborundovom melter. It is preceded with melting of samples from alloy based on titanium nickelide with varied concentration of allying agent in the range of 0.5-2 %, testing of samples on plastic recovery and superelasticity, determining by interpolation of the optimum concentration of alloying admixture and with that concentration the finished product is melted. Metal semi-finished product is represented by porous workpiece, which is prepared by diffusion by sintering in vacuum of mixed powder of titanium nickelide PN55PT45 with alloying agent at 1,230-1,270 °C during 0.5-5 minutes, then it is subjected to cold pressure treatment to porosity of 25-30 vol%.EFFECT: uniform distribution of alloying additive in alloy is provided.1 cl, 2 dwg