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AssigneeSalzgitter AG
InventorsKlaus Freier, Volker Flaxa, Birgit Reichert
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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 subjected to cooling at a cooling rate of ≧1° C./s after the recrystallizing annealing from a temperature T of 200° C. ≦T≦A1. It is consequently possible to obtain properties of bell-annealed steels and nevertheless attain a bake-hardening effect, in particular for C contents of ≧0.02%.
Process for producing 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, characterized in that the recrystallizing annealing is carried out in a bell-type furnace while coiled and in that the strip or sheet is subjected to cooling at a cooling rate of ≧1° C./s after the recrystallizing annealing from a temperature T of 200° C.≦T≦A1.
Dependencies are inferred from the claim text.