Aluminum alloy sheet with excellent formability and method for manufacture thereof
US5944923A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 10, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jan 10, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D2202/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides an aluminum alloy sheet that has excellent formability, high coat-baking hardenability, and ensures a proof stress of 200 MPa or more after the coat-baking stage, and that gives favorable product surface quality after the forming stage and excellent corrosion resistance, and that is particularly suitable for external automobile body plates. The aluminum alloy sheet comprises: 0.9 to 1.3 wt. % of Si, 0.4 to 0.6 wt. % of Mg, 0.05 to 0.15 wt. % of Mn, 0.01 to 0.1 wt. % of Ti, with the remainder comprising Al and inevitable impurities, while limiting Fe as an impurity to 0.2 wt. % or less and Cu as an impurity to 0.1 wt. % or less; a coating film of a lubricant composition containing a water-dispersible polyurethane resin and a natural wax on the aluminum alloy sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.