Process for producing a cold-rolled strip or sheet of steel and strip or sheet which can be produced by the process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 15, 2004
Grant Date -
Aug 7, 2003
app pub date -
Jan 23, 2002
filing date -
Jan 23, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The production of a cold-rolled strip or sheet of steel with good deforming properties, which is subjected to recrystallizing annealing and, if appropriate, a dressing operation after hot rolling, coiling and cold rolling and has a bake-hardening potential after a subsequent deformation and for a subsequent temperature treatment, succeeds because the recrystallizing annealing is carried out in a bell-type furnace while coiled and because the strip or sheet is subjected to cooling at a cooling rate of .gtoreq.1.degree. C./s after the recrystallizing annealing from a temperature T of 200.degree. C..ltoreq.T.ltoreq.A.sub.1. It is consequently possible to obtain properties of bell-annealed steels and nevertheless attain a bake-hardening effect, in particular for C contents of .gtoreq.0.02%.
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