Voestalpine Stahl Gmbh

Martin Rosner

Siegfried Kolnberger

Thomas Kurz

Andreas Sommer

Harald Schwinghammer

The invention relates to a method for producing a hardened, steel component with regions of different hardness and/or ductility; a blank is stamped out and either heated in some regions to a temperature &#x2265;Ac, and then transferred to a forming die, is formed, and is cooled at a speed that is greater than the critical hardening speed and thus hardened or is cold formed into the finished shape and the formed blank is heated in some regions to a temperature &#x3e;Acand then transferred to a hardening die and is hardened at a speed greater than the critical hardening speed; the steel material is adjusted in a transformation-delaying fashion so that a quench hardening through transformation of austenite into martensite takes place at a forming temperature that lies in the range from 450&#xb0; C. to 700&#xb0; C.; after the heating and before the forming, an active cooling takes place at &#x3e;15 K/s.

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Oed-Öhling, Austria

Martin Rosner