Cu-Ni-Sn alloy processing

Details Cu-Ni-Sn alloy processing Cu-Ni-Sn alloy processing

1975-10-08

1977-03-15

Stallard, W.

Metal treatment

Compositions

Heat treating

148 127C, C22F 108

Patent

active

040122409

ABSTRACT:
A method is disclosed for processing a coppernickel-tin ingot of a composition which at room temperature is in a two-phase state and which at a temperature significantly higher than room temperature but below the melting temperature of the alloy is in a single-phase state. The disclosed method calls for mechanical deformation of the cast ingot in a two-phase state by an amount corresponding to at least 30 percent area reduction and at a temperature above the reversion temperature and near the recrystallization temperature of the alloy. The deformed ingot may subsequently undergo further processing steps such as homogenizing, cold working, and aging.

REFERENCES:
patent: 1545838 (1925-07-01), Lehr
patent: 1816509 (1931-07-01), Wise
patent: 2117106 (1938-05-01), Silliman
patent: 2128122 (1938-08-01), Dahl et al.
patent: 3663311 (1972-05-01), Chin et al.
patent: 3940290 (1976-02-01), Pryor et al.
patent: 3941620 (1976-03-01), Pryor et al.
Plewes, J. T.; Metal Progress; Spinodal Cu-Ni-Sn Alloys are Strong and Superductile; July 1974; pp. 46-48.
Schwartz, L. H. et al. Acta Metalurgica; Decomposition of Copper-Nickel-Tin and its effect on Mechanical Properties; 5/1974; pp. 601-609.
Backofen, W. A.; Deformation Processing; 1972; Addison-Wesley Publishing Co.

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