Sheet Steel Having A Deterministic Surface Structure
Patent No. EP4031302 (titled "Sheet Steel Having A Deterministic Surface Structure") was filed by Thyssenkrupp Steel Europe on Sep 8, 2020. The application was issued on Oct 29, 2025.
Patent Summary
A hot-dip coated steel sheet features a deterministic surface structure embossed from its surface (1.1), comprising a flank region (2.3) extending to a valley region (2.2). The valley region is characterized by a roughness Ra of less than 300 nm. The coating is metallic, specifically zinc-based, potentially containing up to 5 wt.% aluminum and/or magnesium. The flank region may be angled between 1° and 89° (preferably 65°–82°) relative to the sheet's perpendicular. The sheet may be oiled (up to 2 g/m²), where capillary forces concentrate oil along the flanks, minimizing valley wetting. Production involves skin-treating the coated sheet with a roller possessing a deterministic surface structure to imprint the specified geometry.
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Date
Description
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EP4031302
- Application Number
- EP20771250A
- Filing Date
- Sep 8, 2020
- Status
- Granted And Under Opposition
- Sep 26, 2025
- Publication Date
- Oct 29, 2025
- External Links
- Slate, Register , Google Patents