半固态成形技术是一种金属成形的新方法,它具有铸锻工艺的综合优点。利用应变诱导熔化激活法(SIMA法)制备了7A09铝合金半固态坯料,研究了预变形量对7A09铝合金半固态组织的影响。结果表明,在相同条件下,预变形程度越大,晶粒的平均直径越小,其形状系数也越小,且逐渐趋近于1,晶粒形状趋近于球形。 Semi-solid forming technology is a new method of metal forming, which has the comprehensive advantages of the casting and forging process. 7A09 aluminum alloy semi-solid billet was prepared by strain induced melting activation (SIMA) method. The effect of pre-deformation on the semi-solid 7A09 aluminum alloy structure was studied. The results show that under the same conditions, the greater the degree of pre-deformation, the smaller the average diameter of the grains, the smaller the shape coefficient and gradually approaching 1, and the shape of the grains approaches the shape of the sphere.