| 摘要 |
PURPOSE:To simultaneously execute extruding and storing treatment of the extruded shape in the shape memory alloy by extruding a Cu-Al-Ni series shape memory alloy in a specified temp. range and thereafter immediately subjecting it to rapid cooling. CONSTITUTION:At the time of defining the beta solid soln. transformation temp. in a Cu-Al-Ni series shape memory alloy as Tbeta and the melting starting temp. in the alloy as Tm, the ingot of the alloy is extruded, e.g. into the shape of a wire at T deg.C, the temp. in the range satisfying Tbeta-100 deg.C<=T<=Tm-50 deg.C and is thereafter immediately subjected to rapid cooling by a water cooling method or the like. The shape memory alloy excellent in extrudability and straightness and in which the shape in a linear state free from curling caused by rolling is correctly stored can efficiently be manufactured. |
