High-strength aluminum alloy for die casting having excellent corrosion resistance and thermal conductivity, method for producing the same, and method for producing aluminum alloy casting using the same

A method for producing a high-strength aluminum alloy for die casting having excellent corrosion resistance and thermal conductivity, the method comprising:

• a first step of preparing materials comprising, based on the total weight of the materials, 5 to 7 wt % of silicon (Si), 0.1 to 1.0 wt % of iron (Fe), 1.0 to 3.0 wt % of magnesium (Mg), 0.1 to 1.0 wt % of nickel (Ni), 0.15 to 0.45 wt % of titanium (Ti), 1.0 to 3.0 wt % of tin (S), and the remainder aluminum (Al);
• a second step of melting the prepared aluminum (Al) by heating to temperature of 700 to 750° C., followed by heating to a temperature of 800 to 250° C.;
• a third step of adding the silicon (Si) to a melt resulting from the second step, followed by heating to a temperature of 900 to 1000° C.;
• a fourth step of adding the iron (Fe), nickel (Ni) and titanium (Ti) to a mixture resulting from the third step, and then heating the mixture for 4 to 5 hours;
• a fifth step of reducing the temperature of the mixture of the fourth step to a temperature of 700 to 750° C., and then adding the magnesium (Mg) and tin (Sn) to the mixture, followed by melting;
• and
• a sixth step of removing impurities from the mixture of the fifth step, and then tapping the mixture as an ingot, thereby producing the alloy.