| 摘要 |
A process for the preparation of a copper-zinc material consists of setting out with an alloy having a theoretical copper content of 61 to 65%, preferably 62% by weight, with the remainder being zinc and common impurities. This alloy is initially cast and, if necessary, subjected to an alpha stabilizing annealing. After subsequent cold working in one or a few operative steps with a degree of deformation of at least 70%, the alloy is subjected to a heat treatment so as to lead to a beta 1 precipitation and recrystallization. The alloy then evidences a structure in which the recrystallized phases alpha and beta 1 are present as a discrete fine mixture. Thereafter, the alloy can be again cold worked and annealed. |
