Method for and equipment for suppressing discoloration of Al-Mg products
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 forge...
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| creator | Øyen, Geir Rist, Snorre Bauger, Øystein Steen, Idar Kjetil Romfo, Alf Inge Reiso, Oddvin Pettersen, Tanja |
| description | 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% CO2gas with a preference for 0,5 - 1,5 % CO2gas. |
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| language | eng |
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| subjects | ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Method for and equipment for suppressing discoloration of Al-Mg products |
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