Controlling distortion in processed copper beryllium alloys

摘要

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.