Treatment of beryllium-copper alloy and articles made therefrom

Details Treatment of beryllium-copper alloy and articles made therefrom Treatment of beryllium-copper alloy and articles made therefrom

1978-12-11

1979-12-18

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148160, C22C 904

Patent

active

041793145

ABSTRACT:
Copper-based alloys containing minor amounts of beryllium, cobalt and/or nickel, and zirconium are subjected to treatment comprising, in sequence: annealing followed by quenching; cold working; a second optional annealing followed again by quenching; a cold working; an initial age hardening treatment; a secondary age hardening treatment; if necessary, straightening the alloy; and stress relieving the straightened alloy. Optimum elevated temperature properties are developed in alloys treated according to the present invention and articles made of the treated alloys are useful under conditions involving high operating speed and elevated temperature.

REFERENCES:
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patent: 2412447 (1946-12-01), Donachie
patent: 2527983 (1950-10-01), Brown et al.
patent: 3133843 (1964-05-01), Scherbner
patent: 3196006 (1965-07-01), Lane et al.
patent: 3240635 (1966-03-01), Hose et al.
Pfeiffer et al.--Metallwissenschaft und Technik, vol. 22(11), pp. 1125-1129, (Nov. 1968).
Wikle, "Heat Treatment of Beryllium Copper Alloys," Industrial Heating, Nov. 1973, pp. 24-31.
Covington, "Heat Treating Copper and Copper Alloys," Metal Progress, May 1974, pp. 75-79.
Harrington, "The Metallurgy of Modern Alloys-Type IIA-Double Aging, " Steel Processing, Feb. 1944, pp. 101-105.

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