| 摘要 |
PURPOSE:To enable to cut down the cost of fine wires used for the titled device by a method wherein one or two kinds or more of Ge, Be and Ca are contained in one or two kinds or more of rare-earth element as occasion demands, thereby enabling to let the remainder have the composition consisting of Cu and inevitable impurities. CONSTITUTION:The rare-earth element is improved in the breaking strength at high temperature and also in the tensile strength at high temperature, and the content of said rare-earth element is designated at 0.0005-2.0%. The ingredient of Ge, Be and Ca, when they are coexisted with rare-earth element, has the function wherein their strength at high temperature will be further increased. The content of said ingredient is to be set at 0.0005-0.5%. After a cold rolling has been performed, prescribed cycles of annealing wherein an annealing at 300 deg.C in vacuum is considered as one cycle, are performed on the wire material. Subsequently, a stripping process is performed using dies. A wire-drawing process and the specified cycles of wire-drawing process, wherein annealing at 300 deg.C in vacuum is considered as one cycle, are performed. |
