PROCESS FOR THE EXTRUSION OF HIGH-STRENGTH ALUMINUM ALLOYS

1. A method of extrusion, followed by quenching, of high-strength based aluminium alloys of series 2 000 and 7 000, wherein the extrusion ratio is from 20 to 200, characterised in that : a) extrusion is effected with a lubricant, at a speed of over 15 m/minute ; b) the extrusion temperature is betwe...

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Bibliographische Detailangaben
Hauptverfasser:	DENOUX, MICHEL, WATTIER, JEAN-MARY, DESCHAMPS, RICHARD, GUITTON, FRANCIS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS FUELS GLASS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS JOINING GLASS TO GLASS OR OTHER MATERIALS LUBRICANTS LUBRICATING COMPOSITIONS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY MINERAL OR SLAG WOOL PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PUNCHING METAL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	1. A method of extrusion, followed by quenching, of high-strength based aluminium alloys of series 2 000 and 7 000, wherein the extrusion ratio is from 20 to 200, characterised in that : a) extrusion is effected with a lubricant, at a speed of over 15 m/minute ; b) the extrusion temperature is between Ts -50 degrees C and Tm -180 degrees C, Ts being the equilibrium solidus temperature of the alloy, and is adjusted within that range so that the temperature of the metal leaving the die is between Tm and Ts , Tm being the minimum temperature at which the said alloy is solution heat treated ; c) the metal is quenched from extrusion heat at the usual cooling speeds for the alloy in question.