Method of manufacturing tubes of zirconium alloys with improved

Details Method of manufacturing tubes of zirconium alloys with improved Method of manufacturing tubes of zirconium alloys with improved

1988-07-29

1990-03-13

Dean, R.

Metal treatment

Compositions

Heat treating

C22F 118

Patent

active

049080717

ABSTRACT:
The invention relates to a method of making tubes of Zirconium alloys containing 1-5 percent by weight of alloying elements such as Sn, Fe, Cr and Ni. According to the invention an improved corrosion resistance can be reached by means of annealing after extrusion and between cold rollings within a well defined temperature range in the .alpha.-phase zone during considerably longer times than standardized for the purpose of reaching equilibrium between secondary phase particles and Zirconium matrix and in that way a minimum content of Fe in solid solution.

REFERENCES:
patent: 3645800 (1972-02-01), Mock et al.
patent: 3865635 (1975-02-01), Hofvenstam et al.
patent: 3963534 (1976-06-01), Frenkel et al.
patent: 4450020 (1984-05-01), Vesterlund
Mechanical Metallurgy by George E. Dieter, Jr., dated 1961, pp. 153-157.
Quality Costs of Zircaloy Cladding Tubes--Rose and Granlund, proceeding of the Int'l Conf organized by the British Nuclear Energy Soc. held Oct. 15-19, 1973.
Elements of Physical Metallurgy by Albert G. Guy, dated Apr. 1967, pp. 418-439.

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