Production of high strength aluminum alloy foils
AssigneeAlcan International Limited
InventorsIljoon Jin, Kevin Gatenby, Christopher Gabryel
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Abstract
An aluminum alloy foil is formed from an alloy containing about 1.2 to 1.7% by weight iron, about 0.4 to 0.8% by weight silicon and about 0.07 to 0.20% by weight manganese, with the balance aluminum and incidental impurities. The alloy is continuously strip cast, e.g. on a belt caster, to form a strip having a thickness of less than about 25 mm, which is then cold rolled to interanneal gauge followed by interannealing at a temperature of about 280 to 350° C. The interanneal strip is cold rolled to final gauge and further annealed to form the final foil product, having high strength and excellent quality.
Claims12
A process for producing a high-strength aluminum foil using a continuous strip caster, comprising the steps of:
- (a) providing an alloy containing in percentage by weight about 1.2 to 1.7% iron, about 0.4 to 0.8% silicon, about 0.07 to 0.20% manganese and the balance being aluminum and incidental impurities,
- (b) casting the alloy on a continuous strip caster 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 about 280 to 350° C.,
- (e) cold rolling the interannealed 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, 0.4 to 0.8% by weight Si and 0.07 to 0.2% by weight Mn, with the balance aluminum and incidental impurities, said foil at final gauge having an ultimate tensile strength (UTS) after annealing at a temperature of at least 300° C. of greater than 130 MPa.
Dependencies are inferred from the claim text.