Process for manufacturing thin components made of zirconium-based alloy and straps thus produced
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United States of America Patent
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Apr 8, 2003
Grant Date -
N/A
app pub date -
Aug 15, 2001
filing date -
Feb 15, 1999
priority date (Note) -
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Abstract
The present invention relates to a method for making flat, thin elements which consist of: producing a zirconium alloy blank also containing, besides the inevitable impurities, 0.8 to 1.3% of niobium, 1100 to 1800 ppm of oxygen, and 10 to 35 ppm of sulfur; carrying out a .beta. hardening and hot rolling to obtain a blank and performing on it at least three cold rolling passes with intermediate annealing heat treatments. One of the intermediate heat treatments is performed for a duration of at least 5 hours at a temperature less than 560.degree. C. and all the optional treatments subsequent to the long treatment are carried out at a temperature of less than 620.degree. C. for not more than 15 minutes.
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