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研究了Ｓｎ对镁合金显微组织和力学性能的影响。研究结果表明，纯镁中加入Ｓｎ后能使纯镁铸锭中粗大的柱状晶转化为均匀的等轴晶，并有效地细化晶粒，同时在显微组织中形成具有立方Ｃ１结构的Ｍｇ２Ｓｎ颗粒相。由于Ｍｇ２Ｓｎ颗粒相显微硬度和熔点高，热稳定性好，因而对基体具有有效的弥散强化作用，提高了ＭｇＳｎ二元合金的室温及高温强度。在Ｍｇ９Ａｌ０．８Ｚｎ基合金中加入少量的Ｓｎ便能有效地提高合金的耐热性，而加入过多的Ｓｎ反而会导致合金高温强度下降。
The effect of Sn on the microstructure and mechanical properties of magnesium alloy was studied. The results show that the addition of Sn to pure magnesium can transform the coarse columnar crystals in the pure magnesium ingot into uniform equiaxed grains and effectively refine the grains, meanwhile form Mg2Sn with cubic C1 structure in the microstructure Particle phase. Mg2Sn particles due to micro-phase hardness and high melting point, good thermal stability, and thus the matrix has an effective dispersion strengthening, improved Mg Sn binary alloy room temperature and high temperature strength. Adding a small amount of Sn into the Mg9Al0.8Zn-based alloy can effectively improve the heat resistance of the alloy, while adding too much Sn can lead to the decrease of the high temperature strength of the alloy.