PRODUCTION OF TWISTED WIRE MEMBER CONSISTING OF NICKEL-TITANIUM SHAPE MEMORY ALLOY FINE WIRE

摘要

PROBLEM TO BE SOLVED: To produce a twisted wire consisting of a Ni-Ti shape memory alloy fine wire having reduced surface oxidation and good quality by simultaneously subjecting plural wires to drawing, annealing, forming and shape memorizing treatment. ;SOLUTION: The twisted wire member consisting of a Ni-Ti shape memory alloy fine wire is produced so that plural wires of a Ni-Ti shape memory alloy wire subjected to a straight line memorizing treatment beforehand, while maintaining to a temp. state higher than the transformation temp. of a wire stock, is covered with a metal sheathing material to form a composite wire stock, successively, by repeating cold reducing and annealing for the composite wire stock, a composite drawn wire of a prescribed size is produced, by twisting the composite drawn wire and forming to a prescribed length and shape, a twisted composite drawn wire is produced, successively, after subjecting to memorizing treatment thereon, the sheathing material is removed.;COPYRIGHT: (C)1998,JPO