| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultraelastic material with low hardness after being annealed and satisfactory in workability, further excellent in ultraelastic properties, and used for a spectacles frame or the like. SOLUTION: An ultraelastic material of an Ni-Ti-X ternary system containing one or more kinds selected from among Co, Fe, V and Cr as the third component X is used, wherein the As transformation point in the solution-treated material is -45 to -25°C. In the production of the ultraelastic material, shape memorizable heat treatment is performed in the temperature range of 400 to 530°C. COPYRIGHT: (C)2005,JPO&NCIPI
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