US2009314392A1PendingUtilityA1

Cast component and method for the production thereof

Assignee: BDW TECHNOLOGIES GMBHPriority: Jun 24, 2008Filed: Jun 11, 2009Published: Dec 24, 2009

Est. expiryJun 24, 2028(~1.9 yrs left)· nominal 20-yr term from priority

Inventors:Juergen Wuest Richard Weizenbeck Dirk E.O. Westerheide

C22C 21/02C22F 1/043

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References

Claims

Abstract

The invention relates to a method for the production of a cast component made of an aluminium diecasting alloy, in which the cast component is subjected to a heat treatment process after casting, wherein an aluminium diecasting alloy is used, by means of which the cast component has an elongation at break A 5 of ≧10% and a yield point Rp 0.2 of <120 MPa, and wherein a single-step annealing process for stability is carried out at a temperature of 120-260° C., after which the heat-treated cast component has a break at elongation A 5 of ≧7% and a yield point Rp 0.2 of ≧110 MPa. Furthermore, the invention relates to a cast component which is produced in accordance with a method of this type.

Claims

exact text as granted — not AI-modified

1 . Method for producing a cast component made of an aluminium diecasting alloy, in which the cast component is subjected to a heat treatment process after casting, characterised in that
 an aluminium diecasting alloy is used, by means of which the cast component, as cast, has an elongation at break A 5  of ≧10% and a yield point RP 0.2  of &lt;120 MPa, and in that an annealing process for stability is carried out at a temperature of 120-260° C., after which the heat-treated cast component has an elongation at break A 5  of ≧7% and a yield point Rp 0.2  of ≧110 MPa.   
   
   
       2 . Method according to  claim 1 ,
 characterised in that   an aluminium diecasting alloy with &lt;8.5% by weight, and in particular ≦8.3% by weight silicon is used   
   
   
       3 . Method according to  claim 1 ,
 characterised in that   an aluminium diecasting alloy with &lt;0.6% by weight, and in particular 0.02-0.3% by weight magnesium is used.   
   
   
       4 . Method according to  claim 1 ,
 characterised in that   an aluminium diecasting alloy with the following alloy elements is used:   
     
       
         
               
               
             
                   
               
                   4 to 8.2 
                 % by weight silicon 
               
                 0.5 to 0.6 
                 % by weight manganese 
               
                 0.15 to 0.2  
                 % by weight iron 
               
                 0.04 to 0.2  
                 % by weight magnesium 
               
                 0.04 to 0.08 
                 % by weight titanium 
               
                 14 * 10 −3  to 18 * 10 −3   
                 % by weight strontium (140-180 ppm) 
               
                   
               
           
              
             
             
              
              
              
              
              
              
              
             
          
         
       
       and the rest being formed of aluminium, which individually contains a maximum of 0.05% and a total maximum of 0.2% by weight impurities caused by the production method. 
     
   
   
       5 . Method according to  claim 1 ,
 characterised in that   an aluminium diecasting alloy is used, by means of which the cast component, as cast, has an elongation at break A 5  of ≧11%, and in particular of ≧12%.   
   
   
       6 . Method according to of  claim 1 ,
 characterised in that   an aluminium diecasting alloy is used, by means of which the cast component, as cast, has an elongation at break A 5  of ≧13%.   
   
   
       7 . Method according to  claim 1 ,
 characterised in that   an aluminium diecasting alloy is used, by means of which the cast component, as cast, has a yield point Rp 0.2  of ≧105, and in particular of ≧110 MPa.   
   
   
       8 . Method according to  claim 1 ,
 characterised in that   an aluminium diecasting alloy is used, by means of which the cast component, as cast, has a yield point Rp 0.2  of ≧115, and in particular of ≧120 MPa.   
   
   
       9 . Method according to  claim 1 ,
 characterised in that   the annealing process for stability is carried out at a temperature of 200-240° C.   
   
   
       10 . Method according to  claim 1 ,
 characterised in that   the annealing process for stability is carried out, after which the heat-treated cast component has a yield point Rp 0.2  of ≧115 to ≦165 MPa, and in particular ≧125 to ≦220 MPa.   
   
   
       11 . Cast component made of an aluminium diecasting alloy and subjected to a heat treatment process after casting,
 characterised in that   the cast component is formed from an aluminium diecasting alloy which, as cast, has an elongation at break A 5  of ≧10% and a yield point Rp 0.2  of &lt;120 MPa,   in that the cast component is subjected to an annealing process for stability at a temperature of 120-260° C., after which the heat-treated cast component has a break at elongation A 5  of ≧7% and a yield point Rp 0.2  of ≧110 MPa.   
   
   
       12 . Cast component according to  claim 11 ,
 characterised in that   the aluminium diecasting alloy of the cast component comprises &lt;8.5% by weight, and in particular ≦8.3% by weight silicon.   
   
   
       13 . Cast component according to  claim 11 ,
 characterised in that   the aluminium diecasting alloy of the cast component comprises &lt;0.6% by weight, and in particular 0.02-0.3% by weight magnesium.   
   
   
       14 . Cast component according to  claim 11 ,
 characterised in that   the aluminium diecasting alloy of the cast component comprises the following alloy elements:   
     
       
         
               
               
             
                   
               
                   4 to 8.2 
                 % by weight silicon 
               
                 0.5 to 0.6 
                 % by weight manganese 
               
                 0.15 to 0.2  
                 % by weight iron 
               
                 0.04 to 0.2  
                 % by weight magnesium 
               
                 0.04 to 0.08 
                 % by weight titanium 
               
                 14 * 10 −3  to 18 * 10 −3   
                 % by weight strontium (140-180 ppm) 
               
                   
               
           
              
             
             
              
              
              
              
              
              
              
             
          
         
       
       and the rest being formed of aluminium, which individually contains a maximum of 0.05% and a total maximum of 0.2% by weight impurities caused by the production method. 
     
   
   
       15 . Cast component according to  claim 11 ,
 characterised in that   the cast component, as cast, has an elongation at break A 5  of ≧11%, and in particular of ≧12%.   
   
   
       16 . Cast component according to  claim 11 ,
 characterised in that   the cast component, as cast, has an elongation at break A 5  of ≧13%.   
   
   
       17 . Cast component according to  claim 11 ,
 characterised in that   the cast component, as cast, has a yield point Rp 0.2  of ≧105, and in particular of ≧110 MPa.   
   
   
       18 . Cast component according to  claim 11 ,
 characterised in that   the cast component, as cast, has a yield point Rp 0.2  of ≧115, and in particular of ≧120 MPa.   
   
   
       19 . Cast component according to  claim 11 ,
 characterised in that   the cast component is subjected to an annealing process for stability at a temperature of 200-240 ° C.   
   
   
       20 . Cast component according to  claim 11 ,
 characterised in that   the heat-treated cast component has a yield point Rp 0.2  of ≧115 to ≦220 MPa, and in particular ≧125≦165 MPa.

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