Al-zn alloy for die casting having both high strength and high thermal conductivity

Abstract

The present invention relates to an aluminum alloy which has excellent thermal conductivity as well as high castability and satisfactory tensile characteristics, and is thus applicable to various kinds of structural products that require heat dissipation characteristics. According to the present invention, the aluminum alloy for die casting includes 5.5-8.5 wt % of zinc (Zn), 0.5-3.0 wt % of magnesium (Mg), 0.45-1.5 wt % of iron (Fe), and the remainder consisting of aluminum (Al) and inevitable impurities.

1 . An aluminum alloy for die casting comprising 5.5-8.5 wt % of zinc (Zn), 0.5-3.0 wt % of magnesium (Mg), 0.45-1.5 wt % of iron (Fe), and the remainder consisting of aluminum (Al) and inevitable impurities. 
     
     
         2 . The aluminum alloy of  claim 1 , wherein the content of zinc is 5.5 to 8.0 wt %. 
     
     
         3 . The aluminum alloy of  claim 1 , wherein the content of magnesium is 0.7 to 2.0 wt %. 
     
     
         4 . The aluminum alloy of  claim 1 , wherein the content of iron is 0.5 to 1.1 wt %. 
     
     
         5 . The aluminum alloy of  claim 1 , having a thermal conductivity of 130 W/mK or more and a tensile strength of 230 MPa or more. 
     
     
         6 . The aluminum alloy of  claim 1 , wherein a difference between a liquidus temperature (T L ) and a solidus temperature (T S ) of the aluminum alloy is 70° C. or less.