研究了机械搅拌对ＺＡ２７合金组织的影响，同时给出了温度与固相率的对应值．结果表明，在机械搅拌下，ＺＡ２７合金的凝固组织为等轴晶或玫瑰状聚集体，由枝晶残体和棒状与球状粒子组成，且随着温度的降低，初生相逐渐球状化和分散化；初生晶非树状化是由于枝晶臂颈缩折断，合并生长所致；机械搅拌加剧了晶臂颈缩，促进了颈缩折断；固相间存在着合并生长 The effect of mechanical agitation on the microstructure of ZA27 alloy was studied, and the corresponding values ​​of temperature and solid fraction were also given. The results show that the solidified microstructure of ZA27 alloy is equiaxed or rose - like aggregates, consisting of dendrites and rods and spherical particles under mechanical agitation. As the temperature decreases, the primary phases gradually become spherical and disperse. Non-dendritic primary crystal is due to the dendritic arm necking shrinkage, the merger growth; mechanical aggravate aggravate the crystal arm necking, and promote the neck broken off; there are merged between solid growth