Patent ID: 11920206
Assignee: THYSSENKRUPP RASSELSTEIN GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 7:
8. The flat steel product according to claim 1, wherein the flat steel product is obtained from a steel having the composition of the flat steel product by:
hot rolling a slab produced from the a steel to obtain a hot-rolled steel strip,
cold rolling the hot-rolled steel strip at a reduction ratio of at least 80% to obtain a cold-rolled steel strip with a thickness of less than 0.49 mm,
annealing the cold-rolled steel strip in a continuous annealing furnace, wherein for obtaining a recrystallization-annealed steel strip the cold-rolled steel strip is inductively heated in the continuous annealing furnace to an annealing temperature above a recrystallization temperature and held at the annealing temperature for a predetermined holding time,
primary cooling of the recrystallization-annealed steel strip to a take-off temperature which is below a transformation temperature of 723° C. with a maximum primary cooling rate of less than 1000 K/s, and
secondary cooling of the recrystallization-annealed steel strip to a temperature of less than 80° C. with a secondary cooling rate of more than 1000 K/s.