Method for and equipment for suppressing discoloration of Al—Mg products

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United States of America Patent

PATENT NO 11453938
APP PUB NO 20200232080A1
SERIAL NO

16731136

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Abstract

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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% CO2 gas with a preference for 0.5-1.5% CO2 gas.

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Patent Owner(s)

Patent OwnerAddress
NORSK HYDRO ASA0240 OSLO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Øyen, Geir Furugrenda, NO 2 1
Bauger, Øystein Trondheim, NO 3 2
Pettersen, Tanja Trondheim, NO 1 0
Reiso, Oddvin Sunndalsøra, NO 16 36
Rist, Snorre Sunndalsøra, NO 1 0
Romfo, Alf Inge Grøa, NO 2 0
Steen, Idar Kjetil Sunndalsøra, NO 7 30

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