Cast part

Abstract

The invention relates to a cast part.

1 . Cast part made from an Al casting alloy, containing at least five of the alloy components listed below:
 Si: 2.5 to 3.3, preferably 2.7 to 3.1 wt.-%,   Mg: 0.2 to 0.7, preferably 0.3 to 0.6 wt.-%,   Fe: <0.18, preferably 0.05 to 0.16 wt.-%,   Mn: <0.5, preferably 0.05 to 0.4 wt.-%,   Ti: <0.1, preferably 0.01 to 0.08 wt.-%,   Sr: <0.03, preferably 0.01 to 0.03 wt.-%,   Cr: 0.3 to 1.3, preferably 0.4 to 1.0,
 particularly preferably 0.5 to 0.8 wt.-%, 
   Others: <0.1 wt.-%,   
       and is supplemented to 100 wt.-% with Al, in each instance, wherein the cast part is artificially aged between 150 to 240° C. for 15 to 120 minutes, preferably for 15 to 60 minutes, particularly preferably for 20 to 55 minutes, and very particularly preferably for 30 to 55 minutes. 
     
     
         2 . Cast part, particularly according to  claim 1 , wherein the cast part is artificially aged between 170 to 230° C. for 15 to 120 minutes, preferably for 15 to 60 minutes, particularly preferably for 20 to 55 minutes, and very particularly preferably for 30 to 55 minutes. 
     
     
         3 . Cast part, particularly according to  claim 1 , wherein the cast part is artificially aged between 200 to 220° C. for 15 to 120 minutes, preferably for 15 to 60 minutes, particularly preferably for 20 to 55 minutes, and very particularly preferably for 30 to 55 minutes. 
     
     
         4 . Cast part, particularly according to  claim 1 , wherein the cast part is solution-annealed between 490 and 550° C. for 1 to 10 hours, preferably for 5 to 9 hours, particularly preferably for 6 to 8 hours. 
     
     
         5 . Cast part, particularly according to  claim 1 , wherein the cast part is solution-annealed between 530 and 550° C. for 1 to 10 hours, preferably for 5 to 9 hours, particularly preferably for 6 to 8 hours. 
     
     
         6 . Use of a cast part according to  claim 1  as a component or part for or of chassis parts of motor vehicles.