分别采用常规浇注和机械振动辅助浇注制备了Mg-Sr中间合金,并进行了化学成分、显微组织、物相组成和力学性能的测试与对比分析。结果表明:与常规浇注相比,机械振动辅助浇注可显著细化晶粒,促使合金成分均匀,提高合金的力学性能,使合金平均晶粒尺寸减小59%,室温抗拉强度提高17%,零度冲击吸收功提高42%;但没有改变合金的相组成,两种浇注方法制备的合金都是由α-Mg基体和Mg17Sr2相组成。 The Mg-Sr master alloys were prepared by conventional casting and mechanical vibration casting respectively. The chemical composition, microstructure, phase composition and mechanical properties were tested and compared. The results show that compared with conventional casting, the mechanical vibration assisted casting can significantly refine the grains, promote the uniform composition of the alloy, improve the mechanical properties of the alloy, reduce the average grain size of the alloy by 59%, increase the tensile strength at room temperature by 17% The zero impact absorption capacity increased by 42%; however, without changing the phase composition of the alloy, the alloys prepared by the two casting methods are composed of the α-Mg matrix and the Mg17Sr2 phase.