Controlling distortion in processed copper beryllium alloys

Details Controlling distortion in processed copper beryllium alloys Controlling distortion in processed copper beryllium alloys

1985-03-18

1985-09-17

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 127C, C22F 108

Patent

active

045418756

ABSTRACT:
This invention provides a novel method for the production of formed parts from copper beryllium alloys. More specifically, this invention provides a process for the virtual elimination of the non-reproducible distortion which is currently experienced during the precipitation hardening of parts formed from copper beryllium alloys. To this end the process comprises a series of mechanical and thermal treatments which minimize or eliminate non-reproducible distortion by relieving or decreasing the magnitude of residual stresses throughout the various steps of the process before the formation of precipitates becomes dominant and by providing a more even patterned distribution of precipitates in the matrix of the alloy both prior to and after a thermal aging process. Additionally, the implementation of this process in conjunction with a precipitation hardening treatment utilizing a molten salt bath heating medium results in an alloy which exhibits an increased elongation in tandem with an increased proportional limit.

REFERENCES:
patent: 2257708 (1941-09-01), Stott
patent: 2412447 (1946-12-01), Donachie
patent: 3138493 (1964-06-01), Smith
patent: 3658601 (1972-04-01), Britton et al.
patent: 4179314 (1979-12-01), Wickle
patent: 4394185 (1983-07-01), McClelland et al.
patent: 4425168 (1984-01-01), Goldstein et al.

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