Zn alloy plated steel sheet having excellent phosphatability and spot weldability and method for manufacturing same
US10544497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2015 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | Sep 12, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C18/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A Zn alloy plated steel sheet having excellent phosphatability and spot weldability and a method for manufacturing the same are provided. In the Zn alloy plated steel sheet including a base steel sheet and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.5-2.8%, Mg: 0.5-2.8%, and a remainder of Zn and inevitable impurities, and a cross-sectional structure of the Zn alloy plating layer includes, by area percentage, more than 50% of a Zn single phase structure and less than 50% of a Zn—Al—Mg-based intermetallic compound. A surface structure of the Zn alloy plating layer includes, by area percentage, 40% or less of a Zn single phase structure and 60% or more of a Zn—Al—Mg-based intermetallic compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.