Vallourec Deutschland Gmbh

Thorsten Schmitz

Thomas Müller

Nicolas Trapp

Norbert Arzt

Burkhard Helten

Burkhard Wietbrock

Simon Van Wessel

Andreas Jahn

In a method for producing hot-rolled sections of steel with a rectangular or square cross-section, a substantially round pipe blank produced seamlessly by hot rolling or cold finished and welded and having a defined nominal outside diameter is initially produced and then formed at a forming temperature into a hollow section having the required cross-section, with visible edges Cand Cof the hollow section having a value &#x2266;1.5&#xd7;t (t=wall thickness). The pipe blank has a nominal outer diameter determined from a reduction ratio of the pipe blank to be achieved and the hollow section dimensions to be achieved, wherein the reduction ration lies within a range of &#x2212;2% to &#x2212;13% and is determined according to the following formula:Reduction ratio[%]=[(2&#xd7;())&#x2212;&#x3c0;&#xd7;]&#xd7;100%/[2&#xd7;()].

Method for producing hot rolled hollow sections having a rectangular cross-section and small edge radii

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Krefeld, Germany

Thorsten Schmitz