Patent ID: 6402861
Filing Date: 2002-06-11
Classification: C22C,C22F

Abstract:
A process for the production of a base foil with a thickness of 0.2-0.6 mm of an aluminum alloy comprising:(1) introducing into a casting mold a hot melt comprising an Alâ€”Feâ€”Si type alloy containing (a) Fe in a quantity of more than 0.3% by weight and less than 1.2% by weight and (b) Si in a quantity of greater than 0.20% weight and less than 1% by weight, the alloy having a Si/Fe ratio between above 0.4:1 and below 1.2:1, (2) casting the hot melt into a strip-like slab, and then (3) hot rolling the strip-like slab into a cast-rolled plate composed substantially of a single phase of &agr;-AlFeSi, steps (1), (2), and (3) constituting a continuous cast-rolling operation; and (4) undertaking one or more cold rolling steps to roll the cast-rolled plate into the base foil, and undertaking in and up to no later than directly after the last of said cold rolling steps (5) a first heating step and a second heating step to form the base foil, wherein (i) the first heating step heat-treats the cold-rolled plate to promote deposition of an Alâ€”Fe type compound and (ii) the second heating step heat-treats the cold-rolled plate treated by the first heating step to promote deposition of an Alâ€”Feâ€”Si type compound.