High-performance wrought magnesium alloy and preparation method thereof

The magnesium alloy comprises, by mass, 2.0-2.4% of Sm, 1.0-1.4% of Nd, 1.0-1.4% of Gd, 0.4-0.6% of Zn, 0.4-0.6% of Zr and the balance Mg, during preparation, all the components are taken and sequentially subjected to alloy casting, solution treatment, hot extrusion and three-step aging treatment, the high-performance wrought magnesium alloy can be obtained, the tensile strength of the magnesium alloy at the room temperature is higher than 420 MPa, and the tensile strength of the magnesium alloy at the room temperature is higher than 420 MPa. And the percentage elongation after fracture is higher than 8%. 一种高性能变形镁合金及其制备方法，镁合金以质量百分比计，包括以下组分：Sm2.0～2.4%，Nd1.0～1.4%，Gd1.0～1.4%，Zn0.4～0.6%，Zr0.4～0.6%，余量为Mg，制备时，取各组分，依次通过合金熔铸、固溶处理、热挤压及三步法时效处理，即可得到本发明的高性能变形镁合金，该镁合金室温下抗拉强度高于420MPa，断后伸长率高于8%。