Title: Improvements in or relating to annealing metal tubing
Application Number: 86105711 Application Date: 1986.08.02
Publication Number: 1010135 Publication Date: 1987.04.08
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C22F1/18
Applicant(s) Name: Westinghouse Electric Corp. (US) Westinghouse Buil Address:
Inventor(s) Name: Francis Cellier;George Paul abol;Robert john Comst
Attorney & Agent: LUO YINGMING CHEN JIZHUANG
Abstract:
    Process of alpha annealing of zirconium-based tubing utilizing induction heating to heat a cold worked tubing article rapidly to an elevated temperature after which it is then cooled. Time at the selected elevated temperature is less than 1 second, and preferably essentially zero. Stress relieving of cold pilgered Zircaloy may be performed by induction heating to a temperature of from 540 to 650 DEG C. Partial recrystallization annealing of cold pilgered Zircaloy may be performed. Full alpha recrystallization annealing of cold pilgered Zircaloy may be performed by induction heating to a temperature of from 760 to 900 DEG C.
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