Method of making aluminum alloy foil and product therefrom
US5725695A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1996 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Mar 26, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/043
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of making an aluminum foil product from an aluminum-silicon-iron aluminum alloy comprises casting the alloy into a slab, preferably by twin roll casting, cold rolling the alloy to an intermediate gauge and reroll annealing the intermediate gauge material. The reroll annealed material is then cold rolled to a final foil gauge followed by a final recrystallizing annealing. The aluminum alloy has a controlled amount of silicon and iron such that the silicon is equal to or greater than the iron amount and the reroll anneal temperature is 800.degree. F. (427.degree. C.) or less. The combination of the controlled amounts of silicon and iron and the lower reroll anneal temperature results in an improved foil product in terms of finer grain size and higher elongation which is also less costly to produce.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.