High temperature aluminium alloy

Abstract

In an aluminium alloy of type AlMgSi with good creep strength at elevated temperatures for the production of castings subject to high thermal and mechanical stresses the contents of the alloying elements magnesium and silicon in % w/w in a Cartesian coordinate system are limited by a polygon A with the coordinates [Mg; Si] [8.5; 2.7] [8.5; 4.7] [6.3; 2.7] [6.3; 3.4] and that the alloy also contains 0.1 to 1% w/w manganese max. 1% w/w iron max. 3% w/w copper max. 2% w/w nickel max. 0.5% w/w chromium max. 0.6% w/w cobalt max. 0.2% w/w zinc max. 0.2% w/w titanium max. 0.5% w/w zirconium max. 0.008% w/w beryllium max. 0.5% w/w vanadium as well as aluminium remainder rest with further elements and manufacturing-related impurities of individually max. 0.05% w/w and max. 0.2% w/w in total. The alloy is suitable in particular for the production of cylinder crankcases by the pressure die casting method.

1 . Aluminium alloy of type AlMgSi with good creep strength at elevated temperatures for the production of castings subject to high thermal and mechanical stresses, 
     characterized in that
 the contents of the alloying elements magnesium and silicon in % w/w in a Cartesian coordinate system are limited by a polygon A with the coordinates [Mg; Si] [8.5; 2.7] [8.5; 4.7] [6.3; 2.7] [6.3; 3.4] and that the alloy also contains 
 0.1 to 1% w/w manganese 
 max. 1% w/w iron 
 max. 3% w/w copper 
 max. 2% w/w nickel 
 max. 0.5% w/w chromium 
 max. 0.6% w/w cobalt 
 max. 0.2% w/w zinc 
 max. 0.2% w/w titanium 
 max. 0.5% w/w zirconium 
 max. 0.008% w/w beryllium 
 max. 0.5% w/w vanadium 
 
     as well as aluminium as remainder with further elements and manufacturing-related impurities of individually max. 0.05% w/w and max. 0.2% w/w in total. 
   
   
       2 . Aluminium alloy according to  claim 1 , containing 6.9 to 7.9% w/w Mg. 
   
   
       3 . Aluminium alloy according to  claim 1 , containing 3.0 to 3.7% w/w Si. 
   
   
       4 . Aluminium alloy according to  claim 1 , characterized in that the contents of the alloying elements magnesium and silicon in % w/w in a Cartesian coordinate system are limited by a polygon B with the coordinates [Mg; Si] [7.9; 3.0] [7.9; 3.7] [6.9; 3.0] [6.9; 3.7]. 
   
   
       5 . Aluminium alloy according to  claim 4 , characterized in that the contents of the alloying elements magnesium and silicon in % w/w in a Cartesian coordinate system are limited by a polygon C with the coordinates [Mg; Si] [7.7; 3.1] [7.7; 3.6] [7.1; 3.1] [7.1; 3.6]. 
   
   
       6 . Aluminium alloy according to  claim 1 , containing 0.4 to 1% w/w Fe, and 0.1 to 0.5% w/w Mn. 
   
   
       7 . Aluminium alloy according to  claim 1 , containing max. 0.20% w/w Fe and 0.5 to 1% w/w Mn. 
   
   
       8 . Aluminium alloy according to  claim 1 , containing 0.2 to 1.2% w/w Cu. 
   
   
       9 . Aluminium alloy according to  claim 1 , containing 0.8 to 1.2% w/w Ni. 
   
   
       10 . Aluminium alloy according to  claim 1 , containing max. 0.2% w/w Cr. 
   
   
       11 . Aluminium alloy according to  claim 1 , containing 0.3 to 0.6% w/w Co. 
   
   
       12 . Aluminium alloy according to  claim 1 , containing 0.05 to 0.15% w/w Ti. 
   
   
       13 . Aluminium alloy according to  claim 1 , containing 0.1 to 0.4% w/w Zr. 
   
   
       14 . Aluminium alloy according to  claim 1 , containing 0.02 to 0.15% w/w V, and less than 60 ppm Be. 
   
   
       15 . Use of an aluminium alloy according to  claim 1  for components subject to high thermal and mechanical stresses produced by pressure die casting, mould casting or sand casting. 
   
   
       16 . Use according to  claim 15  for cylinder crankcases produced by the pressure die casting method in automotive engine construction. 
   
   
       17 . Use of an aluminium alloy according to  claim 1  for safety components produced by the pressure die casting method in automotive construction. 
   
   
       18 . Aluminium alloy according to  claim 1  containing 7.1 to 7.7% w/w Mg. 
   
   
       19 . Aluminium alloy according to  claim 1  containing 3.1 to 3.6% w/w Si. 
   
   
       20 . Aluminium alloy according to  claim 2  containing 3.0 to 3.7% w/w Si.