Outokumpu Oyj

Thyssenkrupp Steel Europe Ag

Outokumpu Nirosta Gmbh

Frank Wörster

Dirk Wiemer

Jörn Teipel

Patrick Vogel

Burkhard Arnold

Andreas Jääger

Michael Weg

Lutz Zoppke

Bernd Schuhmacher

Hans-Joachim Krautschick

Roman Glass

Nina Kolbe

Stefan Peter Puls

Janine Schauer-Paβ

Utz Karsten

Jörg Kazmierski

Klaus Manfred Lange

Arnold Burkhard

A method for producing a patterned stainless steel sheet with improved visual characteristics in the wavelength area of visible light including providing a deformed stainless steel sheet; performing a heat treatment on the deformed stainless steel sheet, wherein the heat treatment is conducted at a temperature of 900-1200&#xb0; C.; performing a mechanical treatment on at least one surface of the heat treated stainless steel sheet; transferring the mechanically treated stainless steel sheet to a patterning process, wherein, in the patterning process, at least one side of the mechanically treated stainless steel sheet is patterned using a patterning roll having a surface with an emboss depth of up to 100 micrometers to provide a patterned stainless steel sheet; and performing a heat treatment on the patterned stainless steel sheet, wherein the heat treatment is conducted at a temperature range of 900-1200&#xb0; C., wherein the mechanical treatment is carried out by blasting.

Method for producing a stainless steel sheet with modified visual characteristics

The invention relates to a method for producing a patterned stainless steel sheet with modified visual characteristics in the wavelength area of visible light the deformed stainless steel having a thickness of 0.3-3.5 mm. In the method the deformed stainless steel sheet is pretreated by at least one heat treatment step and at least one mechanical treatment step on at least one surface of the heat treated stainless steel sheet. The pretreated stainless steel sheet is further transferred to a patterning process, and at least one heat treatment step is carried out on the patterned stainless steel sheet surface.

A method for producing a flat steel product with high reflectivity, in which at least one surface has an arithmetic mean roughness Ra of less than 0.03 &#x3bc;m includes providing a flat steel product, at least one surface of which has an arithmetic mean roughness Ra of less than 2.5 &#x3bc;m. The flat steel product is cold rolled in a plurality of rolling passes. Also a flat steel product with high reflectivity in the finished re-rolled state on at least one of its surface has a low arithmetic mean roughness, a high gloss, and a high directed reflection. A solar concentrator is produced from such a flat steel product.

Flat steel product with high reflectivity, flat steel product and mirror element for solar concentrators

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Netphen, Germany

Frank Wörster