Aluminum alloy for cast node of vehicle space frames and method of manufacturing cast node using the same

Abstract

The aluminum alloy of a vehicle space frame includes aluminum as a main ingredient, 0.4 to 0.5 wt % of copper, 2.5 to 3.0 wt % of silicon, 0.1 wt % or less of magnesium, 0.1 wt % or less of iron and 0.2 wt % or less titanium. The method of manufacturing the vehicle space frame includes casting the above material, subjecting the cast aluminum alloy to a solution treatment, and heat treating the resulting material at 150° C.-160° C. for 4-5 hours.

1 . An aluminum alloy for a cast node of a vehicle space frame, which comprises aluminum as a main ingredient, 0.4 to 0.5 wt % of copper, 2.5 to 3.0 wt % of silicon, 0.1 wt % or less of magnesium, 0.1 wt % or less of iron and 0.2 wt % or less of titanium.  
   
   
       2 . A method of manufacturing a cast node of a vehicle space frame, which comprises: 
 casting an aluminum alloy which comprises aluminum as a main ingredient, 0.4 to 0.5 wt % of copper, 2.5 to 3.0 wt % of silicon, 0.1 wt % or less of magnesium, 0.1 wt % or less of iron and 0.20 wt % or less of titanium;    subjecting the cast aluminum alloy to a solution treatment; and    heat-treating the resulting material at a temperature of from 150 to 160° C. for 4 to 5 hours.    
   
   
       3 . An aluminum alloy for a vehicle space frame, said aluminum alloy comprising aluminum; about 0.4 to 0.5 wt % copper; about 2.5 to 3.0 wt % silicon; at most about 0.1 wt % magnesium; at most about 0.1 wt % of iron; and t most about 0.2 wt % titanium.  
   
   
       4 . A method of manufacturing a vehicle space frame, which comprises: 
 casting an aluminum alloy which comprises aluminum; about 0.4 to 0.5 wt % copper; about 2.5 to 3.0 wt % silicon; at most about 0.1 wt % magnesium; at most about 0.1 wt % of iron; and t most about 0.2 wt % titanium;    subjecting the cast aluminum alloy to a solution treatment; and    heat-treating the resulting material at a temperature of from about 150 to about 160° C. for about 4 to about 5 hours.