Aluminum member

Abstract

An aluminum member produced by casting a molten metal composed of predetermined ingredients is disclosed. The aluminum member is casted by supplying the molten metal to a space between a fixed die, a movable die, and a sand core disposed between the fixed die and the movable die, and then cooling the molten metal moderately.

What is claimed is: 
     
         1 . An aluminum member composed of ingredients of, by weight percentage, 1.0% to 3.0% of Si, 4.0% to 6.0% of Mg, 1.0% or less Fe, 1.0% or less Mn, 0.5% or less Cu, 0.5% or less Zn, at least either of 0.10% to 0.20% of Ti or 0.0015% to 0.0030% of Be added to obtain a fine grain size in a metal structure, and a residual of Al and inevitable impurities,
 wherein the aluminum member is produced using a cast die and a sand core disposed in the cast die by casting a molten metal composed of the ingredients in a space between the cast die and the sand core.   
     
     
         2 . The aluminum member according to  claim 1 , being a hollow die cast member produced by high pressure casting. 
     
     
         3 . The aluminum member according to  claim 2 , wherein the hollow die cast member is a subframe for a vehicle. 
     
     
         4 . The aluminum member according to  claim 3 , wherein a cross-member unit and a suspension supporting unit are integrated in the subframe for a vehicle, the cross-member unit and the suspension supporting unit having a hollow structure. 
     
     
         5 . The aluminum member according to  claim 3 , wherein the subframe for a vehicle includes an inclined portion.