Alcan Rhenalu

Constellium France

Constellium Rolled Products Ravenswood, LLC

Alcan Rolled Products - Ravenswood, LLC

Sandrine Dulac

Sylvain Henry

Christian Barthelemy

Michel Mediouni

Armand Gabriel

Sylvestre Safrany

The invention relates to a strip or sheet of aluminium alloy, comprising at least 80% by weight of aluminium and 0.01 to 0.5% yttrium and/or 0.05 to 0.5% bismuth, coated on at least one face with a brazing alloy. Said sheets and strips are used for the production of pieces by non-flux brazing.

Aluminium alloy strip for brazing

A process for the manufacture of plated strips comprising at least two layers of different metals or alloys. The process allows subsequent separation of different cropped layers resulting from shearing the plated strips. The process comprises preparing plates corresponding to each of the plating layers, superimposing and assembly of these plates to form a composite plate, hot and possibly cold rolling of this composite plate to obtain a plated strip, and shearing of cropping areas during or after rolling. In one embodiment, prior to superimposing the different plates, an anti-sticking agent is applied to the cropping areas of at least one of the surfaces of the plates which will be in contact with each other.

Method for separating cropped layers from plated strips by roll bonding

The invention relates to an aluminum alloy strip or sheet with the following composition (% by weight):

Method for brazing strips of aluminium alloy

A method of assembling aluminum alloy products, such as sheets, strips or tubes, by means of fluxless brazing, where the absence of flux is made possible by using a prior treatment resulting in formation of a conversion layer on the surface of the products. The treatment involves using a solution containing Kand Fions and at least one acid in a quantity such that the pH of the solution is less than 3. The inventive method enables effective flux was brazing in industrial conditions, such as a for the production of heat exchangers used in motor vehicles.

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Grenoble, France

Sandrine Dulac