Thermomechanical processing of beryllium-copper alloys

Details Thermomechanical processing of beryllium-copper alloys Thermomechanical processing of beryllium-copper alloys

1985-08-08

1987-04-14

Andrews, Melvyn J.

Metal treatment

Compositions

Heat treating

148414, 148435, 420485, C22F 108

Patent

active

046576010

ABSTRACT:
The invention contemplates a thermomechanical process applicable to beryllium copper alloys consisting essentially of about 0.2 wt % to about 0.7 wt % beryllium; from about 1.0 wt % to about 3.5 wt % nickel and cobalt in the aggregate, where nickel comprises at least about 1.0 wt %; up to about 1.0 wt % zirconium; up to about 0.005 wt % lead; up to about 0.1 wt % magnesium; up to about 1.5 wt % silver; up to about 0.5 wt % incidental impurities including lead; and the balance essentially copper; which process comprises solution annealing said alloy at a temperature of at least about 90% of the incipient melting point of the alloy expressed in degrees Fahrenheit, cold working the solution treated alloy to reduce the section thickness thereof at least about 60% or much more, and then aging the alloy to produce therein an improved combination of properties including strength, ductility, formability and conductivity.

REFERENCES:
patent: 2257708 (1941-09-01), Stott
patent: 4425168 (1984-01-01), Goldstein et al.

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