Production of aluminum alloy foils having high strength and good rollability
AssigneeAlcan International Limited
InventorsIljoon Jin, Kevin Gatenby, Christopher Gabryel, Toshiya Anami, Takahiko Watai, Ichiro Okamoto
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Abstract
An aluminum alloy foil is formed from an alloy containing about 1.2 to 1.7% by weight Fe and about 0.35 to 0.80% by weight Si, with the balance aluminum and incidental impurities. The alloy is continuously strip cast to form a strip having a thickness less than about 25 mm, which is then cold rolled to interanneal gauge and interannealed at a temperature of at least 400° C. The interannealed strip is cold rolled and further annealed to form the final foil product, having excellent rollability combined with high strength of the final foil.
Claims12
A process for producing an aluminum foil product by continuous strip casting in which the product exhibits excellent rollability combined with high strength of final foil product comprising the steps of:
- (a) providing an aluminum alloy containing 1.2 to 1.7% by weight Fe and 0.35 to 0.80% by weight Si, with the balance aluminum and incidental impurities,
- (b) continuous strip casting the alloy to form a cast strip having an as-cast thickness of less than about 25 mm,
- (c) cold rolling the cast strip to interanneal gauge,
- (d) interannealing the strip at a temperature of at least 400° C.,
- (e) cold rolling the interanneal strip to final gauge, and
- (f) subjecting the final gauge strip to a final anneal.
An aluminum alloy foil formed from an alloy containing 1.2 to 1.7% by weight Fe and 0.35 to 0.80% by weight Si, with the balance aluminum and incidental impurities, said foil at final gauge having an ultimate tensile strength (UTS) at 0 temper of greater than 90 MPa.
Dependencies are inferred from the claim text.