Alcan International Limited

Honda Motor Co., Ltd.

Nippon Light Metal Company, Ltd.

Novelis, Inc.

Ichiro Okamoto

Kevin Michael Gatenby

Toshiya Anami

Iljoon Jin

Noboru Hayashi

Yoshito Oki

Kunihiro Yasunaga

Pizhi Zhao

Willard Mark Truman Gallerneault

Hitoshi Kazama

Simon Barker

Willard Mark Gallerneault

Edward S Luce

John Fitzsimon

Christopher M Gabryel

Jean-Pierre Martin

Masahiko Katano

Mark Gallerneault

Takahiko Watai

An aluminum alloy sheet is manufactured by preparing a slab having a thickness of 5 to 15 mm with a continuous casting machine by a continuous casting process using molten alloy containing 0.40% to 0.65% of Mg, 0.50% to 0.75% of Si, 0.05% to 0.20% of Cr, and 0.10% to 0.40% of Fe, a remainder being Al; winding the slab into a coil; cold-rolling the slab into a sheet; subjecting the sheet to solution heat treatment in such a manner that the sheet is heated to a temperature of 530&#xb0; C. to 560&#xb0; C. at a heating rate of 10&#xb0; C./sec or more and then maintained at the temperature for five seconds or more; quenching the sheet with water; coiling up the sheet; maintaining the sheet at a temperature of 60&#xb0; C. to 110&#xb0; C. for 3 to 12 hours; and then cooling the sheet to room temperature.

Aluminum alloy sheet and method for manufacturing the same

An aluminum alloy sheet having excellent press formability and stress corrosion cracking resistance, comprises 3.3 to 3.6 percent by weight of Mg and 0.1 to 0.2 percent by weight of Mn, furthermore, 0.05 to 0.3 percent by weight of Fe and 0.05 to 0.15 percent by weight of Si, and the remainder comprises Al and incidental impurities, wherein the sizes of intermetallic compounds is 5 &#x3bc;m or less, the recrystallized grain size is 15 &#x3bc;m or less in the region at a depth of 10 to 30 &#x3bc;m below the sheet surface, and the surface roughness is Ra 0.2 to 0.7 &#x3bc;m.

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&deg; 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.

Production of aluminum alloy foils having high strength and good rollability

An improved aluminum alloy fin stock is described having both a high strength and a high thermal conductivity. The fin stock contains 1.2-1.8% Fe, 0.7-0.95% Si, 0.3-0.5% Mn, 0.3-1.2% Zn and the balance Al, and is produced by continuously strip casting the alloy at a cooling rate greater than 10&deg; C./sec. but less than 200&deg; C./sec., hot rolling the strip to a re-roll sheet without homogenization, cold rolling the re-roll sheet to an intermediate gauge, annealing the sheet and cold rolling the sheet to final gauge. This fin stock has a conductivity after brazing of greater than 49.8% IACS.

High conductivity aluminum fin alloy

A method of producing an aluminum alloy fin stock material, comprising the steps of continuously strip casting an aluminum finstock alloy to form an as-cast strip, rolling the as-cast strip to form a sheet article of intermediate gauge, annealing the sheet article of intermediate gauge, and cold rolling the annealed sheet article of intermediate gauge to produce an aluminum finstock material of final gauge. The steps are carried out on a finstock alloy which comprises the following elements in weight percent: Fe 1.6 to 2.4; Si 0.7 to 1.1; Mn 0.3 to 0.6; Zn 0.3 to 2.0; Ti 0.005 to 0.040; incidental elements less than 0.05 each, total no more than 0.15; and the balance aluminum. The invention also relates to the finstock material so-produced which has good thermal conductivity, and is suitable for use in thin gauge (e.g. less than 100 &mgr;m, and preferably 60&plusmn;10 &mgr;m).

High thermal conductivity aluminum fin alloys

A continuous cast aluminum alloy strip is used in the production of thin gauge or converter foils. The alloy strip contains 0.4 to 0.8% by weigth Fe and 0.2 to 0.4% by weight Si, has an an cast thickness of less than about 30 mm and contains a substantially single intermetallic species of alpha-phase. The strip is cast using a continuous strip caster, e.g. a block or belt caster.

Production of aluminum alloy strip for use in making thin gauge foils

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Shizuoka, Japan

Ichiro Okamoto