AlMgMn alloy product with improved corrosion resistance
US12024765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2019 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Feb 10, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C21/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a method for manufacturing an aluminum alloy sheet, wherein an aluminum alloy is prepared with the following composition, in wt %: Mg: 4.0-5.2, Mn: 0.40-1.0, Zn: 0.15-0.40, at least one element selected from Ti, Cr, Cu and Zr, the content of the element, if selected, being 0.01-0.15 for Ti, 0.05-0.25 for Cr, 0.02-0.25 for Cu, 0.05-0.25 for Zr, Fe: <0.40, Si: <0.40, other elements or impurities <0.05 each and <0.15 in total, the remainder being aluminum. A rolling plate is cast by vertical semi-continuous casting, and said optionally homogenised plate is hot-rolled in two successive stages to obtain a sheet. The sheets obtained by the method according to the invention are advantageous, in particular for shipbuilding, since they demonstrate, after being exposed for 7 days to a temperature of 100° C., a weight loss of less than 15 mg/cm2 during a corrosion test according to the ASTM G67 standard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.