Metallic coated steel
US12331406B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2023 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Feb 22, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12799
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This metallic coated steel includes a steel material and a metallic coating layer. The metallic coating layer has an average chemical composition including Al: 0.2% to less than 4.0%, Mg: more than 4.0% and less than 12.5%, Ca: 0.15% to less than 3.00%, Zn: 65% or more, and impurities. In an any perpendicular cross section (in a thickness direction) in the metallic coating layer, a metallurgical structure observed in a scanning electron microscope observed visual field contains, in terms of area fraction, an MgZn2 phase: 10 to 40%, an Al—Zn phase: 0 to 15%, an Al phase: (Zn<10%): 0 to 5%, a CaZn13 phase: 1.0 to 15%, and a total of a [ternary eutectic structure of Al/MgZn2/Zn] and a [binary eutectic structure of MgZn2/Zn]: 30% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.