NON-FLAMMABLE MAGNESIUM ALLOY WITH EXCELLENT MECHANICAL PROPERTIES, AND PREPARATION METHOD THEREOF

摘要

Provided is a magnesium alloy with remarkable ignition resistance and being excellent in both strength and ductility. According to the present invention, the magnesium alloy comprises 1.0-7.0 wt% of Al, 0.05-2.0 wt% of Ca, 0.05-2.0 wt% of Y, and the balance of Mg and inevitable impurities, wherein the content of Ca and Y is 0.1-2.5 wt% on the basis of the total weight of the magnesium alloy. According to the present invention, the magnesium alloy forms a dense composite layer serving as a protective film to be able to be melted, cast and processed in air or in the common inert atmosphere (Ar, N2) and to inhibit the spontaneous combustion of chips piled in a machining process due to having superior oxidation resistance or ignition resistance.