US 12,233,442 B2
Sheet steel having a deterministic surface structure
Oliver Vogt, Dortmund (DE); Fabian Junge, Düsseldorf (DE); Christine Bischoff, Drensteinfurt (DE); and Burak William Cetinkaya, Dortmund (DE)
Assigned to ThyssenKrupp Steel Europe AG, Duisburg (DE)
Appl. No. 17/641,496
Filed by ThyssenKrupp Steel Europe AG, Duisburg (DE)
PCT Filed Sep. 8, 2020, PCT No. PCT/EP2020/075083
§ 371(c)(1), (2) Date Mar. 9, 2022,
PCT Pub. No. WO2021/052818, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10 2019 214 135.8 (DE), filed on Sep. 17, 2019.
Prior Publication US 2022/0305538 A1, Sep. 29, 2022
Int. Cl. B21B 1/22 (2006.01); C21D 8/04 (2006.01); C23C 2/06 (2006.01); C23C 2/26 (2006.01)
CPC B21B 1/227 (2013.01) [C21D 8/0442 (2013.01); C23C 2/06 (2013.01); C23C 2/26 (2013.01); B21B 2001/228 (2013.01); B21B 2261/14 (2013.01); Y10T 428/12993 (2015.01)] 9 Claims
OG exemplary drawing
 
1. A sheet steel skin-pass rolled with a deterministic surface structure, where the surface structure, is impressed into the sheet steel starting from a surface of the sheet steel, the surface structure having a flank region which runs, starting from the surface, down to a valley region, wherein the valley region has a roughness Ra of less than 300 nm, the sheet steel having a zinc-based coating, and the coated sheet steel is oiled such that capillary forces acting in a direction of the flank region influences local oil distribution wherein the oil wets the valley region only in small parts or not at all and accumulates in the flank region due to the roughness Ra, wherein the valley region has a roughness Ra of less than 250 nm.