Diecasting alloy based on al-si, comprising particularly secondary aluminum

Abstract

A diecasting alloy based on Al—Si is made of 6 to 12% by weight of silicon (Si), at least 0.3% by weight of iron (Fe), at least 0.25% by weight of manganese (Mn), at least 0.1% by weight of copper (Cu), 0.24 to 0.8% by weight of magnesium (Mg) and 0.40 to 1.5% by weight of zinc (Zn). The alloy also has 50 to 300 ppm of strontium (Sr) and/or 20 to 250 ppm of sodium (Na) and/or 20 to 350 ppm of antimony (Sb), and at least one of the following constituents: titanium (Ti) to an extent of not more than 0.2% by weight; not more than 0.3% by weight of zirconium; not more than 0.3% by weight of vanadium (V); and as the remainder aluminium and unavoidable impurities resulting from the production. The total content of Fe and Mn in the diecasting alloy together is not more than 1.5% by weight, the quotient of the percentages by weight of Fe and Mn is 0.35 to 1.5, and the quotient of the percentages by weight of Cu and Mg is 0.2 to 0.8.

1 . Die-casting alloy on the basis of Al—Si, particularly containing secondary aluminum, wherein the die-casting alloy contains
 6 to 12 wt.-% silicon (Si), 
 at least 0.3 wt.-% iron (Fe), 
 at least 0.25 wt.-% manganese (Mn), 
 at least 0.1 wt.-% copper (Cu), 
 0.24 to 0.8 wt.-% magnesium (Mg) and 
 0.40 to 1.5 wt.-% zinc (Zn), and that 
 
       the die-casting alloy contains
 50 to 300 ppm strontium (Sr) and/or 
 20 to 250 ppm sodium (Na) and/or 
 20 to 350 ppm antimony (Sb), 
 as well as at least one of the following components, at 
 maximally 0.2 wt.-% titanium (Ti); 
 maximally 0.3 wt.-% zirconium; 
 maximally 0.3 wt.-% vanadium (V); 
 and aluminum as the remainder, as well as production-related unavoidable contaminants, 
 
       wherein the total proportion of Fe and Mn in the die-casting alloy, together, amounts to maximally 1.5 wt.-%, the quotient of the weight percents of Fe and Mn amount to 0.35 to 1.5, and the quotient of the weight percents of Cu and Mg amounts to 0.2 to 0.8. 
     
     
         2 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy contains
 0.3 to 1.0 wt.-% iron (Fe),   0.25 to 1.0 wt.-% manganese (Mn) and   0.1 to 0.6 wt.-% copper (Cu).   
     
     
         3 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy fulfills the order relation
   wt.-% Mg>0.2+0.12×(wt.-% Fe/wt.-% Mn)
   
       in terms of its composition. 
     
     
         4 . Die-casting alloy according to  claim 1 , wherein the total proportion of Fe and Mn in the die-casting alloy, together, amounts to maximally 1.2 wt.-%, the quotient of the weight percents of Fe and Mn amounts to 0.5 to 1.25, and the quotient of the weight percents of Cu and Mg amounts to 0.2 to 0.5. 
     
     
         5 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy contains 9.5 to 11.5 wt.-% silicon (Si). 
     
     
         6 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy contains 0.35 to 0.6 wt.-% iron (Fe). 
     
     
         7 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy contains 0.3 to 0.75 wt.-% manganese (Mn). 
     
     
         8 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy contains 0.1 to 0.4 wt.-% copper (Cu). 
     
     
         9 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy contains 0.24 to 0.5 wt.-% magnesium (Mg). 
     
     
         10 . Die-casting alloy according to  claim 1 , wherein the die-casting alloy contains 0.40 to 1.0 wt.-% zinc (Zn).