通过在20～300℃ 下进行单轴拉伸试验,获得5A06-O铝镁合金板材在不同温度、不同应变速率下的真实应力-应变曲线,由此建立5A06-O铝镁合金板材在150～300℃条件下的本构模型.根据上述结果,采用有限元软件MSC.Marc建立5A06铝镁合金温热介质充液成形有限元模拟平台,对典型件的温热介质充液成形进行有限元模拟,建立材料温热介质充液成形的有限元模型.结合实验研究温度场分布规律和载荷条件对板材成形性能的影响.结果表明,差温温度分布可以显著提升材料的成形性能.随着温度的升高,冲头进给速度对成形的影响变得尤为明显,且成形所需液室压力和压边力的最佳参数值均有所降低.“,”The uniaxial tensile test of the 5A06-O aluminium-magnesium (Al-Mg) alloy sheet was performed in the temperature range of 20-300 ℃ to obtain the true stress-true strain curves at different temperatures and strain rates. The constitutive model of 5A06-O Al-Mg alloy sheet with the temperature range from 150 to 300℃ was established. Based on the test results, a unique finite element simulation platform for warm hydroforming of 5A06-O Al-Mg alloy was set up using the general finite element software MSC.Marc to simulate warm hydroforming of classic specimen, and a coupled thermo-mechanical finite element model for warm hydroforming of cylindrical cup was built up. Combined with the experiment, the influence of the temperature field distribution and loading conditions on the sheet formability was studied. The results show that the non-isothermal temperature distribution conditions can significantly improve the forming performance of the material. As the temperature increases, the impact of the punching speed on the forming becomes particularly obvious; the optimal values of the fluid pressure and blank holder force required for forming are reduced.