Manufacture of shape memory alloy

Abstract

Abstract PURPOSE:To reduce cost by arranging a solid pressure medium between a cast billet and a container, and after pressing the medium by an outer stem, extruding by an inner stem at a specified temperature and extrusion ratio. CONSTITUTION:A solid pressure medium 2 is arranged around a cast billet 1 containing 50% Ti and Ni respectively, and inserted into a hole 9 of a container 3 keeping it at temperature above 500 deg.C. Then, an inner stem 7 is attached, and lateral pressure is applied to the medium 2 by an outer stem 8, and then the billet 1 is extruded by the inner stem 7 under the condition of >=700 deg.C temperature and >=5 extrusion ratio. In this method of manufacturing a shape memory alloy, besides the decrease of man-hour, the yield is increased by prevention of internal cracks. Accordingly, the cost can be lowered.

Inventors

• 👤 Kiyotaka Yamauchi
• 👤 山内　清隆
• 👤 Kunio Shidori
• 👤 倭文　邦郎

Bibliographic Details