Method of making aluminum foil for fins

Details Method of making aluminum foil for fins Method of making aluminum foil for fins

2007-02-06

2007-02-06

Wyszumierski, George (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

C148S695000

Reexamination Certificate

active

10297941

ABSTRACT:
A method is described for making an aluminum alloy foil suitable for application to fins used in heat exchangers. The method comprises providing an aluminum alloy composition containing about 0.27% to about 0.55% by weight of iron, about 0.06% to about 0.55% by weight of silicon and optionally up to about 0.20% by weight of copper; continuously casting a coiled strip from the molten aluminum alloy; cold rolling the continuously cast coil to a final gauge of about 0.076 mm to about 0.152 mm and partially annealing the aluminum alloy sheet at a temperature below about 260° C., with a maximum overheat of about 10° C. to anneal the aluminum alloy foil substantially without any recrystallization.

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“Metals Handbook: Desk Edition”, 2nd ed., ASM International, 1998, p. 448.
“ASM Handbook: vol. 4 Heat Treating”, ASM International, 1991, p. 870, 872.

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