中文摘要：

为过程优化和铝合金 7050 前进的落后缩放的微观结构进化的一条数字途径被建议，它联合了商业女性的代码与实验模型一起使 3D 变形。为了获得实验组成的方程和动态再结晶的参数，为铝合金 7050 当模特儿， 7050 件样品的等温的耐压试验在 250 450 °C 的温度范围和 0.01 10 s ⁻¹,的紧张率在 Gleeble-1500 thermo模拟机器上被执行，样品的显微照片分析在一个 Leica DMIRM 图象分析器上被执行。模拟结果证明在营舍的中央区域的动态再结晶在边上比那更容易发生。重复弄翻并且拉长的过程让营舍足够地使变形。在例如弄翻的几个前进过程之中，拉长，舍入并且 flatting，拉长的过程是增加有效紧张并且精制营舍的微观结构的最有效的方法。当前进的步增加，有效紧张显著地升起，平均谷物尺寸严厉地减少。在最后的前进片的大多数部分的重新使结晶的卷部分从 90 μm 的起始的价值到达 100% 和平均谷物尺寸还原剂到 10 μm。

英文摘要：

A numerical approach for process optimization and microstructure evolution of lager-sized forging of aluminium alloy 7050 was proposed, which combined a commercial FEM code Deform 3D with empirical models. To obtain the parameters of empirical constitutive equation and dynamic recrystallization models for aluminium alloy 7050, the isothermal compression tests of 7050 samples were performed on Gleeble-1500 thermo-simulation machine in the temperature range of 250-450℃ and strain rate of 0.01-10 s^-1, and the metallograph analysis of the samples were carried out on a Leica DMIRM image analyzer. The simulation results show that the dynamic recrystallization in the central area of the billet occurs more easily than that on the edge. Repetitious upsetting and stretching processes make the billet deform adequately. Among several forging processes e.g. upsetting, stretching, rounding and flatting, the stretching process is the most effective way to increase the effective strain and refine the microstructure of the billet. As the forging steps increase, the effective strain rises significantly and the average grain size reduces sharply. Recrystallized volume fractions in most parts of the final forging piece reach 100% and the average grain size reduces to 10 μm from initial value of 90 μm.