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:
Sep. 27, 2022
Filed:
Dec. 31, 2019
Norsk Hydro Asa, Oslo, NO;
Alf Inge Romfo, Grøa, NO;
Snorre Rist, Sunndalsøra, NO;
Idar Kjetil Steen, Sunndalsøra, NO;
Geir Øyen, Furugrenda, NO;
Øystein Bauger, Trondheim, NO;
Oddvin Reiso, Sunndalsøra, NO;
Tanja Pettersen, Trondheim, NO;
NORSK HYDRO ASA, Oslo, NO;
Abstract
Method and means for suppressing discoloration during thermal treatment of a product of a magnesium containing aluminium alloy, the alloy contains in wt. % Mg: 0.45-12.0, with a preferred range of 0.45-6.0 wt %. The product, being either an extrusion billet, a sheet ingot, a cast product, or a forged product is heated to a temperature T where it is prone to surface discoloration and oxidation, wherein during the thermal treatment it is exposed to a suppressing atmosphere comprising 0.5-5.0% COgas with a preference for 0.5-1.5% COgas.