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

US9770744B2 · kind B2 · utility

Assignees

• ThyssenKrupp Steel Europe AG · DE
• Outokumpu Nirosta GmbH · DE

Inventors

• Roman Glass · Schwerte, DE
• Utz Karsten · Herdorf, DE
• Jörg Kazmierski · Siegen, DE
• Nina Kolbe · Bochum, DE
• Hans-Joachim Krautschick · Solingen, DE
• Klaus Manfred Lange · Düsseldorf, DE
• Stefan Peter Puls · Dortmund, DE
• Janine Schauer-Paβ · Bochum, DE
• Bernd Schuhmacher · Dortmund, DE
• Dirk Wiemer · Düsseldorf, DE
• Frank Wörster · Netphen, DE

Key dates

• Filing date: Aug 27, 2013
• Grant date: Sep 26, 2017
• Expiry date: Aug 27, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/26
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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 μm includes providing a flat steel product, at least one surface of which has an arithmetic mean roughness Ra of less than 2.5 μm. 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.