Rio Tinto Alcan International Limited

Francis Breton

Joseph Langlais

Peter Donald Waite

Serge Munger

Martin Beaulieu

Alexandre Maltais

Bruno Bourassa

Dany Tremblay

Clément Boudreault

The present disclosure provides Al&#x2014;Si&#x2014;Mg aluminum alloys comprising a deliberate addition of Mn between 0.05-0.40 weight percent to increase at least one tensile property (such as the yield strength) of an aluminum product comprising such alloy. The Al&#x2014;Si&#x2014;Mg alloy comprises, in weight percent, 5-9% Si, 0.35-0.75% Mg, 0.05-0.4% Mn, less than 0.15% Fe, up to 0.15% Ti, 0.005-0.03% Sr and the balance being aluminum and unavoidable impurities, wherein the unavoidable impurities may be present in an amount of up to 0.05% each and up to 0.15% total. The present disclosure provides a foundry ingot comprising the above Al&#x2014;Si&#x2014;Mg aluminum alloy, a process for making the above Al&#x2014;Si&#x2014;Mg aluminum alloy and an aluminum alloy obtainable by said process.

Aluminum alloys having improved tensile properties

The dual-function impeller can be rotated in molten metal in a direction of rotation, as part of a rotary injector. The impeller can have a body having an axis, a plurality of blades circumferentially interspaced around an axis, and an aperture coinciding with the axis. The blades having both a radially extending portion facing the direction of rotation and collectively generating a radial flow component upon said rotation, and a slanted portion also facing the direction of rotation, inclined relative to a radial plane, and collectively generating an axial flow component directed away from the rotary injector upon said rotation.

Dual-function impeller for a rotary injector

A rotary injector comprising an elongated shaft having a proximal end and a distal end, and an impeller at the distal end of the elongated shaft, the elongated shaft and the impeller being collectively rotatable during operation around an axis of the shaft, the rotary injector being hollow and having an internal supply conduit extending along the shaft and across the impeller, the supply conduit having an inlet at the proximal end of the shaft, a main portion extending from the inlet to a discharge portion, the discharge portion extending to an axial outlet, the discharge portion having a narrow end connecting the main portion of the supply conduit and a broader end at the axial outlet.

Rotary injector and process of adding fluxing solids in molten aluminum

Impeller for a rotary injector

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Saguenay, Canada

Francis Breton