| 摘要 |
PURPOSE:To easily produce a high strength and high conductivity copper alloy by casting Cu with which specific amounts of Ag are blended, performing rapid cooling, and then carrying out cold working while applying specific multiplex heat treatment in vacuum or in an inert gas atmosphere. CONSTITUTION:Ag is blended with Cu by 4-32atomic% and the resulting mixture is refined in vacuum or in an inert gas atmosphere, cast, and cooled rapidly, by which primary-crystal Cu and an eutectic phase of Cu and Ag are crystallized finely and uniformly. Subsequently, the resulting alloy is cold-worked to stretch the primary-crystal Cu and the eutectic phase into filament state. Moreover, cold working is done while applying, in the course of this working, multiplex heat treatment in vacuum or in an inert gas atmosphere under the conditions of 300-500 deg.C and 0.5-40hr. By this heat treatment, Ag and Cu existing in the form of solid solution in the primary crystal and the eutectic phase are uniformly precipitated. By this method, the high purity Cu-Ag alloy having a characteristic of high conductivity can be obtained. |
