以高纯铝铸锭(纯度>99.995%)为原材料,采用热轧的加工方法,制备出了表面及板形良好的大规格高纯铝板,研究了高纯铝板不同温度退火后的显微组织。结果表明:变形量为95%左右的轧制态铝板,280℃分别退火45 min和55 min后,可获得晶粒尺寸良好的等轴组织,其平均晶粒直径分别为62.4μm和128.4μm。末道次的轧制变形量对产品的晶粒度有着决定性的影响,变形量越大,晶粒越细小。 High-purity aluminum ingots (purity> 99.995%) were used as raw materials and hot-rolled processing method was used to prepare large-size high-purity aluminum plates with good surface and plate shape. The microstructure of high-purity aluminum plates annealed at different temperatures . The results show that the average grain size is 62.4μm and 128.4μm, respectively. The average grain size of the rolled aluminum is about 45% after annealed at 280 ℃ for 45 min and 55 min, respectively. Last rolling deformation of the product has a decisive impact on the grain size, the greater the deformation, the smaller the grain.