| 摘要 |
PURPOSE:To produce Al alloy foil having improved formability and strength by specifying the temp. of the intermediate annealing between primary and secondary cold rolling and secondary cold rolling draft in the stage of producing the foil from an Al alloy contg. Fe and Mn at specific ratios. CONSTITUTION:A cast Al alloy ingot contg. 0.7-2.0wt% Fe and 0.5-0.2wt% Mn and consisting of the balance Al and unavoidable impurities is subjected to a homogenization treatment at about >=550 deg.C and is hot rolled. The unavoidable impurities may be incorporated therein up to about <=0.2wt% and other elements up to about <=0.05wt%. The rolled alloy is then subjected to the intermediate annealing by heating at 300-500 deg.C at >=5 deg.C/sec heating up rate between the primary cold rolling and the secondary cold rolling in the hot rolling and the final annealing then to the secondary cold rolling at >=50% draft, by which the Al alloy stock is rolled to the foil having about <=0.15mm thickness. The Al alloy foil having the fine crystal grains, high strength and elongation and excellent formability is thus obtd.
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