Method for producing a stainless steel sheet with modified visual characteristics

US11834726B2 · kind B2 · utility

Assignee

• Outokumpu Oyj · FI

Inventors

• Jörn Teipel
• Dirk Wiemer · Düsseldorf, DE
• Lutz Zoppke · Hungen, DE
• Patrick Vogel · Gerbrunn, DE
• Andreas Jääger · Dillenburg, DE
• Michael Weg · Rittershausen, DE
• Burkhard Arnold · Dillenburg, DE
• Frank Wörster · Netphen, DE

Key dates

• Filing date: Aug 27, 2021
• Grant date: Dec 5, 2023
• Expiry date: Aug 27, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D2211/005
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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° 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° C., wherein the mechanical treatment is carried out by blasting.