Process for improving the heat resistance of zirconium and its a

Details Process for improving the heat resistance of zirconium and its a Process for improving the heat resistance of zirconium and its a

1976-12-02

1978-08-22

Stallard, W.

Metal treatment

Compositions

Heat treating

148 3, 148 115F, 148133, C22F 118

Patent

active

041086872

ABSTRACT:
A method for treating zirconium and zirconium alloys, in particular the zirconium alloys used in nuclear reactors which are water cooled, as a structural or casing material for fuels. The method consists in dissolving or maintaining a solid solution of the majority of carbon contained in these alloys by thermal or thermo-mechanical treatments carried out in the .alpha. + .beta. range or if necessary in the .beta. range followed by a rolling in .alpha. phase if necessary. The products obtained have a highly improved mechanical resistance under heat, in particular with regard to resistance to creep; they are particularly suitable for constructing casing tubes for fuels in water cooled nuclear reactors having a better resistance to distortion in relation to time.

REFERENCES:
patent: 2772964 (1956-12-01), Thomas
patent: 2894866 (1959-07-01), Picklesimer
patent: 3097094 (1963-07-01), Rubenstein et al.
patent: 3148055 (1964-09-01), Kass
patent: 3664825 (1972-05-01), Bergqvist et al.
patent: 3782924 (1974-01-01), Van Houten
patent: 3865635 (1975-02-01), Hofvenstam et al.

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