Outokumpu Oyj

Thorsten Piniek

Stefan Lindner

Thomas Fröhlich

Andreas Zeidler

Stefan Schuberth

A method for manufacturing flexible rolling of metal strips, in which a metal strip with pre-definable material thickness is guided through a mill stand by at least two operating steps, which includes several rolls, the metallic strip is during the rolling operation set to lead through a roll gap, where a curve bending line is steered to achieve a defined profile.

Method for manufacturing flexible rolling of metal strips

A method for partial hardening of an austenitic steel by utilizing during cold deformation the TWIP (Twinning Induced Plasticity), TWIP/TRIP or TRIP (Transformation Induced Plasticity) hardening effect. Cold deformation is carried out by cold rolling at least one surface of the steel with forming degree (&#x3a6;) of 5&#x2264;&#x3a6;&#x2264;60% in order to achieve in the steel at least two consecutive areas with different mechanical values in thickness, yield strength (R), tensile strength (Rm) and elongation, having a ratio (r) between the ultimate load ratio (&#x394;F) and the thickness ratio (&#x394;t) of 1.0&#x3e;r&#x3e;2.0, and in which the areas are mechanically connected to each other by a transition area having a thickness that is variable from the thickness of the first area in the deformation direction to the thickness of the second area in the deformation direction.

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Krefeld, Germany

Thorsten Piniek