Mg casting alloy having High thermal conductivity and method of manufacturing the same

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According to an aspect of the present invention, provided is a magnesium casting alloy having high thermal conductivity. The magnesium casting alloy having high thermal conductivity comprises : 3.0-5.0 wt% of zinc (Zn); 0.5-2.0 wt% of calcium (Ca); 0.2-2.0 wt% of a rare earth (RE); and the remainder consisting of magnesium (Mg) and inevitable impurities. Thermal conductivity of the magnesium casting alloy having high thermal conductivity is 100-120 W/m· K, and a tensile strength of 150-170 MPa.(S110) Step of providing melt containing magnesium(S120) Step of injecting a rare earth and zinc into the melt containing magnesium(S130) Step of injecting calcium oxide into the melt containing magnesiumCOPYRIGHT KIPO 2017