SHAPE-MEMORY TREATMENT OF SHAPE-MEMORY ALLOY

摘要

PURPOSE:To perform memory-treatment work in high efficiency, in subjecting the shape-memory alloy to shape-memory treatment, by forming the alloy into an arbitrary shape, making the constraint material of fluid state adhere to the formed substance to form solid state, and carrying out heating to a prescribed temp. to execute the shape-memory treatment. CONSTITUTION:A wire 1 of shape-memory alloy is formed into a shape of an extension spring having hooked parts 3, 3 connected to the both ends of a coiled part 2 by cold working. A large number of the formed parts 4 are arranged in a tray (a), and a constraint material (b), such as gypsum or cement each dissolved in water, which varies from a fluid state to a solid state, is poured into the tray (a). When the constraint material (b) solidifies after a prescribed time, the material on the tray is put into a heater C together with the tray (a), heated to a prescribed temp., and kept there to be subjected to shape-memory treatment. After cooling, the constraint material is crushed and removed. A memory-treated product 5 is thus obtained. In this way, the memory treatment can be executed in high work efficiency.