Aluminum alloy, component of aluminum alloy and method of producing a component from aluminum alloy

Abstract

The invention relates to an aluminum-silicon casting alloy which, in addition to aluminum and unavoidable impurities, comprises at least the following alloying constituents: Silicon between 6.0 and 8.5% by weight, Zinc between 0.2 and 0.8% by weight, Manganese between 0.2 and 0.6% by weight Chromium between 0.1 and 0.3% by weight and Magnesium with up to 0.05% by weight The invention also relates to a structural component made of the aluminum-silicon casting alloy, and to a die casting process for producing a structural component.

What is claimed is: 
     
         1 . An aluminum-silicon casting alloy comprising, in addition to aluminum and unavoidable impurities, at least the following alloying constituents: 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   Silicon 
                   between 6.0 and 8.5% by weight; 
                 
                     
                   Zinc 
                   between 0.2 and 0.8% by weight; 
                 
                     
                   Manganese 
                   between 0.2 and 0.6% by weight; 
                 
                     
                   Chromium 
                   between 0.1 and 0.3% by weight; and 
                 
                     
                   Magnesium 
                   up to 0.05% by weight. 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
                
                
               
            
           
         
       
     
     
         2 . The aluminum-silicon casting alloy according to  claim 1 , comprising between 0.01 and 0.02% by weight of strontium. 
     
     
         3 . The aluminum-silicon casting alloy according to  claim 1 , comprising between 0.04 and 0.15% by weight of titanium. 
     
     
         4 . The aluminum-silicon casting alloy according to  claim 1 , comprising up to 0.2% by weight of iron. 
     
     
         5 . The aluminum-silicon casting alloy according to  claim 1 , comprising up to 0.5% by weight of copper. 
     
     
         6 . The aluminum-silicon casting alloy according to  claim 1 , comprising up to 0.01 % by weight of magnesium. 
     
     
         7 . The aluminum-silicon casting alloy according to  claim 1 , comprising up to 0.25% by weight of molybdenum and/or zirconium. 
     
     
         8 . The aluminum-silicon casting alloy according to  claim 1 , comprising up to 0.15 % by weight of hafnium, cerium and/or another rare earth element. 
     
     
         9 . A structural component, in particular for a motor vehicle, wherein the structural component is cast from an aluminum-silicon casting alloy according to  claim 1 . 
     
     
         10 . The structural component according to  claim 9 , wherein the finished structural component is not solution annealed. 
     
     
         11 . The stuctural component according to  claim 9 , wherein the structural component is a battery housing for a hybrid or electric vehicle. 
     
     
         12 . A method of producing a component, in particular a structural component preferably for a motor vehicle, wherein the component is cast using the aluminum-silicon casting alloy according to  claim 1 . 
     
     
         13 . The method according to  claim 12 , wherein the component is cast in a die casting process. 
     
     
         14 . The method according to  claim 13 , wherein for die casting a die casting mold is used which is tempered to a temperature between 105° C. and 290° C. before casting. 
     
     
         15 . The method according to  claim 13 , wherein the melt of the aluminum-silicon casting alloy has a temperature between 690° C. to 725° C. immediately before casting. 
     
     
         16 . The method according to  claim 13 , wherein no solution annealing takes place between the die casting and a final use of the component.