High-strength hot-dip galvanized steel sheet having excellent yield strength and formability
US9863028B2 · kind B2 · utility
0Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2013 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Jun 21, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12799
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hot-dip galvanized steel sheet contains specific amounts of C, Si, Mn, P, S, Ti, Al, and N with the remainder being iron and unavoidable impurities. Bainitic ferrite, martensite, retained γ, and ferrite (α) are present each in a specific area ratio. The remainder γ has a specific C concentration. Sub-grains in the recrystallized α and un-recrystallized α have a specific grain diameter. The surface area ratio of α and worked α having a grain diameter of 5 μm or more is 5% or less. The average particle diameter of TiC particles inside α grains is 10 nm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.