US 11,834,726 B2
Method for producing a stainless steel sheet with modified visual characteristics
Jörn Teipel, Cologne (DE); Dirk Wiemer, Dusseldorf (DE); Lutz Zoppke, Hungen (DE); Patrick Vogel, Gladenbach (DE); Andreas Jääger, Dillenburg (DE); Michael Weg, Dietzholztal (DE); Burkhard Arnold, Dillenburg (DE); and Frank Wörster, Netphen (DE)
Assigned to Outokumpu Oyj, Helsinki (FI)
Filed by Outokumpu Oyj, Helsinki (FI)
Filed on Aug. 27, 2021, as Appl. No. 17/459,176.
Application 17/459,176 is a continuation of application No. 15/575,102, granted, now 11,155,892, previously published as PCT/EP2016/061100, filed on May 18, 2016.
Claims priority of application No. 15167926 (EP), filed on May 18, 2015.
Prior Publication US 2021/0388460 A1, Dec. 16, 2021
Int. Cl. C21D 9/46 (2006.01); B21B 1/22 (2006.01); B21B 3/02 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 1/26 (2006.01)
CPC C21D 9/46 (2013.01) [B21B 1/227 (2013.01); B21B 3/02 (2013.01); C21D 1/26 (2013.01); C21D 6/002 (2013.01); C21D 8/0205 (2013.01); C21D 8/0236 (2013.01); C21D 8/0247 (2013.01); C21D 8/0278 (2013.01); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01)] 12 Claims
 
1. A method for producing a patterned stainless steel sheet with improved visual characteristics in the wavelength area of visible light, the method comprising:
providing a deformed stainless steel sheet having a thickness of 0.3-3.5 mm;
performing at least one heat treatment on the deformed stainless steel sheet, wherein the heat treatment of the deformed stainless steel sheet is conducted at a temperature of 900-1200° C.;
performing at least one 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 comprising a surface having an emboss depth of up to 100 micrometers to provide a patterned stainless steel sheet; and
performing at least one heat treatment on the patterned stainless steel sheet, wherein the heat treatment of the patterned stainless steel sheet is conducted at a temperature range of 900-1200° C.,
wherein the mechanical treatment before the patterning process is carried out by blasting and the patterned stainless steel sheet has a specular reflectance of less than or equal to 25%.