| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy foil reduced in anisotropy, having excellent elongation properties and having excellent moldability.SOLUTION: Provided is an aluminum alloy foil having a composition containing, by mass, 0.8 to 1.8% Fe, and the balance Al with inevitable impurities, and in which the content of Si is regulated to 0.01% or lower in the inevitable impurities, in which the average crystal grain size is 5 μ or lower, also the ratio of the maximum crystal grain size/the average crystal grain size is 2.5 or lower and the elongation in the respective directions of 0°, 45° and 90° to the rolling direction is 25% or higher. In its production, upon cold rolling, process annealing in which temperature rising rate is 10 to 250°C/s, heating temperature is 450 to 550°C, holding time is 5 s or lower and cooling velocity is 20 to 200°C/s is performed, and thereafter, final cold rolling is performed at the final cold rolling ratio of 90% or higher.SELECTED DRAWING: None |
