The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2012
Filed:
Feb. 16, 2010
Guillaume Bes, Moirans, FR;
Robert Rey-flandrin, Saint Etienne de Crossey, FR;
Olivier Ribaud, Renage, FR;
Stephane Vernede, Grenoble, FR;
Guillaume Bes, Moirans, FR;
Robert Rey-Flandrin, Saint Etienne de Crossey, FR;
Olivier Ribaud, Renage, FR;
Stephane Vernede, Grenoble, FR;
Constellium France, Courbevoie, FR;
Abstract
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 the 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 is described. The process makes it possible to cast 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.