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公开(公告)号：US11453938B2
公开(公告)日：2022-09-27
申请号：US16731136
申请日：2019-12-31
申请人： NORSK HYDRO ASA
发明人： Alf Inge Romfo , Snorre Rist , Idar Kjetil Steen , Geir Øyen , Øystein Bauger , Oddvin Reiso , Tanja Pettersen
摘要： 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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公开(公告)号：US10900107B2
公开(公告)日：2021-01-26
申请号：US14914851
申请日：2014-08-28
申请人： NORSK HYDRO ASA
发明人： Ulf Tundal , Jostein Røyset , Oddvin Reiso , Øystein Bauger
摘要： Method for the manufacturing of an Al—Mg—Si(—Cu) extrusion alloy, the alloy initially being cast to extrusion billet(s), containing in wt. % Si: 0.20-1.50 Mg: 0.25-1.50 Fe: 0.05-0.50 Cu: 0.00-1.00 Mn: 0.00-1.00 Cr: 0.00-0.50 Zn: 0.00-0.50 Ti: 0.00-0.20, and including incidental impurities and balance Al.
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公开(公告)号：US11542576B2
公开(公告)日：2023-01-03
申请号：US15780304
申请日：2016-11-30
申请人： NORSK HYDRO ASA
IPC分类号： C22C21/02 , C25D11/04 , C22F1/043 , C23F1/36 , B21C23/00 , C22C21/08 , C22F1/05 , C22F1/04 , C22F1/047 , C25D11/16
摘要： Aluminium alloys suitable for etched and anodized components, in particular aluminum extrusion alloys of the types containing Magnesium and Silicon, which after being extruded to any wide variety of forms for different applications such as house buildings and other building applications is subjected to etching in a conventional alkaline etching bath and subsequent anodizing, wherein the relation between Cu and Zn is controlled to avoid preferential grain etching and the ratio of Cu/Zn is below 1.
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