High-strength, corrosion-resistant and high-temperature creep-resistant magnesium alloy and preparation method thereof

The invention relates to a magnesium alloy technology and particularly relates to a high-strength, corrosion-resistant and high-temperature creep-resistant magnesium alloy and a preparation method thereof and is used for solving the problem of relatively poor mechanical properties of the existing magnesium alloy in a high-temperature state. The high-strength, corrosion-resistant and high-temperature creep-resistant magnesium alloy is prepared from the following raw materials in percentage by mass: 1%-1.5% of zinc, 8%-10% of gadolinium, 3%-5% of yttrium, 0.5%-1.0% of zirconium, and the balance of magnesium ingots and impurities. By adopting reasonable process steps and the formula, in the high-temperature state of 200 DEG C-350 DEG C, the tensile strength reaches 350MPa-390MPa, the yield strength reaches 250MPa-290MPa, the mechanical properties are substantially increased and the preparation method has the advantages of simple process and low cost and is convenient to operate.