Method of making aluminum foil for fins

C - Chemistry – Metallurgy – 22 – F

Patent

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Details

C22F 1/04 (2006.01) C21D 1/02 (2006.01) C21D 1/26 (2006.01) C22C 21/00 (2006.01) C22C 21/02 (2006.01) C22F 1/043 (2006.01)

Patent

CA 2411128

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.

L'invention concerne un procédé de fabrication d'une feuille en alliages d'aluminium susceptible d'être appliquée sur des ailettes utilisées dans des échangeurs thermiques. Le procédé consiste à produire une composition d'alliages d'aluminium contenant entre environ 0,27 et 0,55 % en poids de fer, entre environ 0,06 et 0,55 % en poids de silicium, et éventuellement jusqu'à environ 0,20 % en poids de cuivre; à couler en continu du feuillard à partir de l'alliage d'aluminium fondu; à laminer à froid ce feuillard coulé en continu jusqu'à obtention d'une épaisseur comprise entre environ 0,076 et 0,152 mm et à partiellement recuire la feuille en alliages d'aluminium à une température inférieure à environ 260 ·C, avec une surchauffe maximale d'environ 10 ·C en vue de recuire ladite feuille sensiblement sans recristallisation.

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