Al-Mg-Si alloy having a high ductility and method of its manufacture

Abstract

An AlMgSi-alloy suitable for manufacturing components having a high ductility, characterized in that the alloy comprising, in wt. %: Mg 0.3 to 1.0 Si 0.3 to 1.2 Fe max. 0.35 Mn >0.15 to 0.4 V 0.05 to 0.20 Cu max. 0.3 Cr max. 0.2 Zn max. 0.2 Ti max. 0.1 impurities max. 0.05% each, total max. 0.15%, balance aluminium

1 . An AlMgSi-alloy suitable for manufacturing components having a high ductility, characterised in that the alloy consists of, in wt. %:  
                                           Mg   0.3 to 1.0         Si   0.3 to 1.2         Fe   max. 0.35         Mn   >0.15 to 0.4         V   0.05 to 0.20         Cu   max. 0.3         Cr   max. 0.2         Zn   max. 0.2         Ti   max. 0.1                                                   impurities max. 0.05% each, total max. 0.15%, balance aluminium.    
     
     
         2 . An AlMgSi-alloy in accordance with    claim 1   , characterised in that the Mn content is in a range of >0.15 to 0.30 wt. %.  
     
     
         3 . An AlMgSi-alloy in accordance with    claim 1   , characterised in that the Mg content is in a range of 0.5 to 0.7 wt. %.  
     
     
         4 . An AlMgSi-alloy in accordance with  1 , characterised in that the Si content is in a range of 0.4 to 0.7 wt. %.  
     
     
         5 . An AlMgSi-alloy in accordance with    claim 1   , characterised in that the Si content is in a range of 0.5 to 0.6 wt. % and the Mg content is in a range of 0.4 to 0.7 wt. %.  
     
     
         6 . An AlMgSi-alloy in accordance with    claim 1   , characterised in that the Si content is in a range of 0.5 to 0.6 wt. % and the Mg content is in a range of 0.45 to 0.55 wt. %.  
     
     
         7 . Method of producing a product of an AlMgSi-alloy in accordance with    claim 1   , characterised in that the method comprises the steps of subsequently: 
 (a) casting the alloy into ingots;    (b) homogenising the cast ingot;    (c) hot-working in the homogenised ingot into a product;    (d) ageing of the product.    
     
     
         8 . Method in accordance with    claim 7   , characterised in that hot-working comprises extrusion.  
     
     
         9 . Method in accordance with    claim 7   , characterised in that homogenising comprises holding the cast ingot for 8 to 30 hours in a temperature range of 530° C. to just below melting temperature of the alloy.  
     
     
         10 . Method in accordance with    claim 7   , characterised in that homogenising comprises holding the cast ingot for 8 to 20 hours in a temperature range of 580° C. to just below melting temperature of the alloy.  
     
     
         11 . Method in accordance with    claim 7   , characterised in that homogenising comprises holding the cast ingot for 8 to 16 hours in a temperature range of 590 to 605° C.  
     
     
         12 . Method of use of a component made from the AlMgSi-alloy in accordance with    claim 1    or obtained from the method in accordance with    claim 7    in a railway vehicle.  
     
     
         13 . Welded structure comprising at least one welded plate or extrusion made of aluminium-magnesium-silicon alloy according to    claim 1   .  
     
     
         14 . Hydroformed structure comprising a component made from the AlMgSi-alloy in accordance with    claim 1    or obtained from the method in accordance with    claim 7   .