Thyssenkrupp Steel Europe Ag

Thyssen Krupp Ag

Jonas Schwabe

Janko Banik

Thomas Heller

Brigitte Hammer

David Pieronek

Harald Hofmann

Christian Höckling

Matthias Schirmer

Dorothée Dorner

Sebastian Stille

Magnus Miller

Alexander Zimmermann

Georg Parma

A cold-rolled flat steel product for deep drawing applications is disclosed, composed of a steel which, in addition to Fe and unavoidable impurities (in % by weight) contains C: &#x3c;0.1%, Al: 6.5-11%, REM: 0.02-0.2%, P: &#x3c;0.1%, S: &#x3c;0.03%, N: &#x3c;0.1% and optionally one or more elements from the group of 'Mn, Si, Nb, Ti, Mo, Cr, Zr, V, W, Co, Ni, B, Cu, Ca, N', provided that Mn: &#x3c;6%, Si: &#x3c;1%, Nb: &#x3c;0.3%, Ti: &#x3c;0.3%, Zr: &#x3c;1%, V: &#x3c;1%, V: &#x3c;1%, Mo: &#x3c;1%, Cr: &#x3c;3%, Co: &#x3c;1%, Ni: &#x3c;2%, B: &#x3c;0.1%, Cu: &#x3c;3%, Ca: &#x3c;0.015%. For production of such a flat steel product, a steel of appropriate composition is cast to give a pre-product, which is then hot-rolled to hot strip at a hot rolling end temperature of 820-1000&#xb0; C. The latter is subsequently wound at a winding temperature of up to 850&#xb0; C., after winding annealed at an annealing temperature of &#x3e;650-1200&#xb0; C. for 1-50 h, then cold-rolled in one or more stages with a total cold rolling level of &#x2265;30% to give the cold-rolled flat steel product and finally annealed at 650-850&#xb0; C.

Cold-rolled flat steel product for deep drawing applications and method for production thereof

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Duisburg, Germany

Jonas Schwabe