Thyssen Stahl Ag

Cestmir Lang

Lutz Meyer

Wolfgang Muschenborn

Lutz Hollenberg

The invention relates to a process for improving the cold formability of hot rolled or cold rolled heat-treatable steels. The characterizing feature of the invention is that with a composition of (in % by weight)

Process for improving the cold formability of heat-treatable steels

The invention relates to a method of producing hot rolled strip having tensile strength values of Rm=500 to 780 N/mm.sup.2 from unalloyed or low-alloy steels with 0.3 to 0.9% C. A steel slab is austenitized and rolled into hot rolled strip which is cooled on a run-out table and then coiled. The characterizing feature of the invention is that the hot rolling and the cooling of the strip on the run-out table are performed in such a manner that the austenite/ferrite transformation in the hot rolled strip starts only in the coil and is finished in the coil.

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Oberhausen, Germany

Cestmir Lang