PRODUCTION OF BARS AND THIN WIRES FROM TITANIUM-NICKEL SYSTEM ALLOY WITH SHAPE MEMORY EFFECT Russian patent published in 2014 - IPC C22F1/10 C22F1/18 C22C1/02 

FIELD: process engineering.

SUBSTANCE: set of invention relates to production of thin bars and wires with shape memory effect and superplasticity from alloys of nickel-titanium system to be used in aircraft engineering, radio electronics, medicine, etc. Proposed method consists on production of the alloy with shape memory effect. Bar-like blank is made from said alloy by compaction or helical rolling and heated to make the bar by rotary swaging in several steps to required size with intermediate heating between swaging steps. Blank is heated before rotary swaging to 300-500°C. Method of alloy production for further making of the bar consists in facing the high-strength graphite crucible walls and bottom by nickel plates. The rest mix is placed inside the crucible to fuse in vacuum induction furnace. The melt is held, teemed in vacuum into chill mould and cooled down to get the ingots. Thereafter, electrode is made from obtained ingots or from bard produced from said ingots. Electrode material is subjected to electron beam smelting in vacuum of at least 5x10^-3 Hg mm to form the ingot in copper casting mould.

EFFECT: wire production from bar by hot or cold drawing.

9 cl, 2 tbl