Sms Group Gmbh

Loi Thermprocess Gmbh

John Cockerill S.a.

Drever International

Frank Maschler

Lutz Kümmel

Walter Scheuermann

Horst Wachholder

Jean-Pierre Crutzen

Lutz Kuemmel

Georg Velten

Michel Renard

Andreas Elsing

Hardy Maass

Michal Buryan

Peter Wendt

Achim Beutel

Jörg Rostek

Method for the preoxidation of high-strength strip steel. The invention relates to an improved method for the preoxidation of high-strength strip steel in a reaction chamber arranged in a furnace chamber. The reaction chamber is sealed at a strip entrance and a strip exit against gas exchange between the furnace chamber and the reaction chamber, and a gas that forms an oxidizing atmosphere in the reaction chamber is introduced, and the gas is continuously circulated within the reaction chamber.

Method for the preoxidation of strip steel in a reaction chamber arranged in a furnace chamber

Method for thermally treating a scrolling steel strip (), said method comprising the following steps: heating the strip () in a zone for heating with a direct flame (); temperature homogenisation of the strip () in a homogenisation chamber () comprising at least one radiant heating tube (), so as to homogenise the strip () in temperature after the passing thereof into the zone for heating with a direct flame () of the preceding step; oxidation of the strip () in an oxidation chamber () with an oxidising atmosphere having an oxygen volume concentration greater than 1%; reduction of the strip () in a reduction zone ().

High-resistance steel strip comprising a temperature homogenisation chamber

A top hat furnace especially adapted for annealing steel sheet metal using a protective gas includes a protective top surrounding the batches of sheet steel metal. A cooling top is arranged above the protective top forming an intermediate space. The cooling top has a cover and a lid. The cover of the cooling top has a plurality of air nozzles so that cooling air impacts the protective top in the form of jets. At least one fan produces a flow of cooling air in the intermediate space. The distance between the air nozzles increases from the bottom of the cover towards it upper end. The distance between the nozzles is from four to twelve times greater than is the diameter of each nozzle. The cooling lid is also provided with a plurality of air nozzles. The distance between the nozzles in the cooling lid is from four to seven times greater than is the diameter of each of these nozzles.

Bell-shaped furnace

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Duisburg, Germany

Frank Maschler