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US 2011/0209843 A2Published application
Casting process for aluminum alloys
AssigneeAlcan Rhenalu
InventorsGuillaume BES, Robert REY-FLANDRIN, Olivier RIBAUD, Stephane VERNEDE
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AssigneeAlcan Rhenalu
InventorsGuillaume BES, Robert REY-FLANDRIN, Olivier RIBAUD, Stephane VERNEDE
Estimating the term…
The present invention relates to a casting process for an aluminum alloy containing at least about 0.1% of Mg and/or at least about 0.1% of Li in which a liquid surface of said alloy is put into contact with a dried gas including at least about 2% of oxygen by volume and with a water partial pressure lower than about 150 Pa throughout most of the solidification process. The invention makes it possible to cast the most oxidable aluminum alloys, in particular aluminum alloys containing magnesium and/or lithium, without using additives such as beryllium and/or calcium and without using expensive devices and/or gases, to obtain cast ingots generally free from surface defects and pollution, in complete safety.
Casting process for an aluminum alloy comprising at least about 0.1% of Mg and/or at least about 0.1% of Li comprising bringing a liquid surface of said alloy into contact with a dried gas comprising at least about 2% of oxygen by volume and with a water partial pressure less than about 150 Pa throughout most of the solidification process.
A facility for casting an aluminum alloy comprising at least about 0.1% of Mg and/or at least about 0.1% of Li using a dried gas including at least about 2% of oxygen by volume and with a water partial pressure lower than about 150 Pa on a liquid surface, wherein said facility is capable of minimizing oxidation of said alloy.
Dependencies are inferred from the claim text.