Aluminum Company of America

Alcoa Inc.

Arconic Technologies LLC

Kobe Steel, Ltd.

Arconic Corporation

Stephen F Baumann

Robert E Sanders, Jr

Michael P Danz

Raymond J Kilmer

Edward P Patrick

Gerald E Carkin

A Victor Pajerski

William G Truckner

Robert A Cargnel

Ronald W Gunkel

John B Eye

Scott L Palmer

Ronald Bachowski

W Bryan Steverson

Donald J Clements

William R Sharkins

Larry G McKinney

Stephen J Rennekamp

Frank P Swigon

Philip C Scheble

Kevin S Papich

Ning Sun

Ralph R Sawtell

Toshiki Ueda

Dhruba J Chakrabarti

Akihiro Tsuruno

Edward L Colvin

Baolute Ren

Fumihiro Koshigoe

Philip E Bretz

Barrie S Shabel

James T Staley

Craig L Jensen

Jocelyn I Petit

Harry R Zonker

William H Hoffman

Robert W Hyland, Jr

John P Palko

William W Hoffman

John J Palko

An aluminum alloy brazing sheet has a 3XXX, 1XXX or 6XXX core, an interliner and a 4XXX brazing layer without added Mg. The interliner has Bi and Mg, the magnesium migrating to the surface of the brazing sheet during brazing and reducing the aluminum oxide to facilitate brazing without flux in a controlled inert atmosphere with reduced oxygen.

Aluminum material for fluxfree cab brazing

Aluminum material for fluxfree CAB brazing

Various illustrative embodiments of a multi-layer brazing sheet are provided. The multi-layer brazing sheet demonstrates improved corrosion resistance on its exposed air side surface.

Multi-layer brazing sheet

A multi-layer aluminum brazing sheet including a core layer, interliner, braze clad layer and a sacrificial layer, in which the post-braze strength of the brazing sheet is optimized by controlling the manganese (Mn), silicon (Si), copper (Cu) and magnesium (Mg) contents of the core layer and the Mn, Si and Cu content of the interliner and the Mn, Si and Zn content of the sacrificial layer and the specifics of the braze thermal cycle. The brazing sheet maintains corrosion resistance, while optimizing post-braze strength, by utilizing 0.5 wt. % to 1.2 wt. % Cu in the interliner. Further, the interliner and sacrificial layer of the brazing sheet contain low or no magnesium to maintain the brazing sheet's braze-ability.

Multilayer braze-able sheet

A wrought aluminum sheet product having a textured surface for improved heat transfer properties. A plurality of textured features having dimensions of about 1-50 microns is roll textured onto one or both sides of the sheet. The aluminum sheet may be used as the fins or tubing of a heat exchanger.

Micro-textured heat transfer surfaces

The present invention relates to an improved method of producing an aluminum alloy sheet which, in one embodiment, includes roll casting an aluminum alloy strip having a thickness of less than about 0.5 inch and, subsequently, preferably without intervening thermal treatments or surface cleaning, cold rolling the strip to a thickness of less than about 0.15 inch, after which the cold rolled strip is subjected to thermal treatment which is preferably either continuous annealing or solution heat treatment. The aluminum alloy, in a continuous annealing embodiment, is preferably selected from the group consisting of the 3XXX and 5XXX series. In another embodiment wherein solution heat treatment is employed, the aluminum alloy is preferably selected from the group consisting of 2XXX and 6XXX. The sheet may be converted into a motor vehicle body panel.

Method of producing aluminum alloy sheet for automotive applications

The invention hereof is directed to a continuous casting of flat rolled sheets selected from automotive sheet, can body sheet, and endstock which exhibits properties comparable to the same products made from World Class Ingot. A preferable embodiment for the continuous caster is a vertical continuous caster.

Process and products for the continuous casting of flat rolled sheet

The present invention relates to an improved method of producing aluminum alloy can body stock and can end stock which are particularly suitable for use in manufacturing aluminum alloy can bodies and ends for can bodies. The method for can body stock includes roll casting an aluminum alloy strip having a thickness of less than about 1 to 5 mm and, subsequently, batch annealing the strip, followed by cold rolling, continuous annealing, quenching and cold rolling to desired gauge. The aluminum alloy sheets may then be employed in manufacturing aluminum alloy can bodies. The process produces aluminum alloy sheet having an improved combination strength and caring properties with acceptable surface characteristics. Unique aluminum alloys usable in the claimed processes are also disclosed. In another embodiment, can ends are made by roll casting, followed by cold rolling preferably without prior thermal treatment, continuous annealing, quenching and cold rolling to the desired gauge.

Method of making aluminum can body stock and end stock from roll cast

A composite metallurgical product includes a roll cast aluminum alloy core and a filler material bonded on the core. Assemblies joined by filler material are formed from this product by heating to flow the filler material into joints and subsequent solidification of the filler material in the joints. The composite product is made in several ways, including lamination at roll caster rolls, and lamination or thermal spraying at the exit side of a roll caster. The invention additionally provides for an angulation rolling method for varying percent of cladding on the composite, and a high-manganese aluminum alloy useful as core material in brazing sheet clad with aluminum-silicon brazing alloy.

Method of continuously casting composite strip

An aluminum alloy product for use as a damage tolerant product for aerospace applications, including fuselage skin stock. The aluminum alloy composition contains about 3-7 wt % magnesium, about 0.03-0.2 wt % zirconium, about 0.2-1.2 wt % manganese, up to 0.15 wt % silicon and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of: scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.

Aluminum magnesium alloy product containing dispersoids

Clad metallurgical products and methods of manufacture

Superplastic forming of aluminum work stock is improved by including therein about 0.05% to about 10% or 15% scandium together with up to 0.2 or 0.25% zirconium. In preferred practices, soluble elements such as magnesium are also included in the aluminum alloy. One or more of the elements from the group of scandium, yttrium, gadolinium, holminum, dysprosium, erbium, ytterbium, lutetium, and terbium, may be included in addition to or in lieu of scandium. Heat treatable aluminum alloys such as 7XXX alloys and 2XXX alloys can be made superplastic by including scandium and zirconium to provide very high strength in superplastically formed products.

Superplastic aluminum products and alloys

The present invention includes casting, e.g., such as by roll casting, or slab casting, an alloy having components in the composition range of about 0.5-1.2% iron, 0.7-1.3% manganese, and 0-0.5% silicon by weight, homogenizing the cast alloy at temperatures below about 1100.degree. F., preferably below about 1050.degree. F. to control the microstructure, and cold rolling to a final product gauge. Such a final product gauge for fin stock applications include thickness in the range of about 0.003-0.006 inch. The cold rolled alloy is then partially annealed to attain desired levels of strength and formability.

Method of making aluminum foil or fin shock alloy product

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Lancaster, PA, United States of America

Stephen F Baumann