Flat product composed of a metal material, in particular a steel material, use of such flat product and roller and process for producing such flat products

US8920938B2 · kind B2 · utility

Assignees

• ThyssenKrupp Steel Europe AG · DE
• Walzen-Service-Center GmbH · DE

Inventors

• Bodo Hesse · Dinslaken, DE
• Karl-Heinz Kopplin · Essen, DE
• Folkert Schulze-Kraasch · Duisburg, DE
• Udo Schulokat · Dinslaken, DE
• Hans-Gerd Weyen · Moers, DE
• Ingo Rogner · Ingolstadt, DE
• Torsten Herles · Dinslaken, DE
• Roland Meier · Holzwickede, DE

Key dates

• Filing date: Jun 20, 2008
• Grant date: Dec 30, 2014
• Expiry date: Jun 20, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24355
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

With the invention a metallic flat product can be systematically made available with such a fine, stochastic or quasi-stochastic surface texture that after a typical automotive paint application it is only minimally perceptible, if at all, by the human eye. At the same time, in the case of a surface topography constituted according to the invention, the transition between the peak plateaus and the valleys takes place via steep flanks. In this way, it is achieved that the morphology of the sheet metal surface is practically independent of the actual depth of the valleys. As a result therefore, the morphology of the sheet metal surface of a metallic flat product according to the invention is also independent of the skin-pass rate, which is obtained when the fine metal texture is produced by skin-pass rolling.