Process for improving the elongation of grain refined copper bas

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

1975-05-12

1976-03-02

Stallard, W.

Metal treatment

Compositions

Heat treating

C22D 108

Patent

active

039416194

ABSTRACT:
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.degree. to 725.degree.C., a final cold reduction of 12 to 45% and a final anneal at about 600.degree. to 725.degree.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.degree. to 600.degree.C. followed by the above reductions and anneals.

REFERENCES:
patent: 3788902 (1974-01-01), Shapiro et al.
patent: 3816187 (1974-06-01), Smith et al.
patent: 3841921 (1974-10-01), Shapiro et al.
patent: 3852121 (1974-12-01), Crane et al.
patent: 3882712 (1975-05-01), Shapiro et al.

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