Process for improving the elongation of grain refined copper...

Details Process for improving the elongation of grain refined copper... Process for improving the elongation of grain refined copper...

C - Chemistry, Metallurgy

22

F

148/35

C22F 1/08 (2006.01)

Patent

CA 1045956

ABSTRACT OF THE DISCLOSURE A process for improving the elongation of copper base alloys containing about 2 to 4.5% aluminum, 15 to 31% zinc, and a grain refining element such as iron, chromium, zirconium, or cobalt, is carried out through controlled grain coarsening. Such alloys are subjected to a cold reduction of about 15 to 40%, an intermediate anneal at about 625° to 725°C, a final cold reduction of 12 to 45% and a final anneal at about 600° to 725°C. Alternatively, the above sequence may be preceded by a preliminary cold reduction of about 10 to 70% and then a preliminary low temperature anneal at about 400° to 600°C followed by the above reductions and anneals.

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