| 摘要 |
PURPOSE:To efficiently obtain an NiTi shape memory alloy of desired shape by working an NiTi alloy in a temp. region from the temp. slightly higher than the thermoelastic-type martensite inverse transformation finish point (Af point) to the prescribed temp. CONSTITUTION:The NiTi alloy is subjected to various workings with being held in the temp. region from the temp. higher by 50 deg.C than the thermoelastic- type martensite inverse transformation finish point (Af point) to 200 deg.C. According to this invention, the application of cold-working equipment to NiTi alloys is made possible and the deterioration of said alloy is negligible. Therefore, by slightly heating and holding the vicinity of a working point, the desired shape can easily be obtained. Moreover, this alloy can cope with various working processes and shapes, so that it can greatly contribute to the supply of secondary operation products of NiTi shape memory alloy. |
