Hot-dip galvanized steel sheet
US10113223B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2015 |
| Grant date | Oct 30, 2018 |
| Priority date | — |
| Expiry date | Nov 5, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/27
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hot-dip galvanized steel sheet having a base steel sheet and a hot-dip galvanized layer, a ferrite phase is, by volume fraction, 50% or less in a range of ⅛ thickness to ⅜ thickness centered at a position of ¼ thickness from the surface of the base steel sheet, a hard structure is 50% or more, wherein the hot-dip galvanized steel sheet has the hot-dip galvanized layer in which Fe is 5.0% or less and Al is 1.0% or less, and columnar grains formed of a ζ phase is 20% or more in an entire interface between the plated layer and the base steel sheet. On the surface of the base steel sheet, a volume fraction of a residual austenite is 3% or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.