采用Gleeble-1500型热模拟试验机对Al-1．04Mg-0．85Si-0．01Cu铝合金进行热压缩试验，研究了其在300~500℃和0．001～1．0s叫应变速率下的热变形行为，并利用光学显微镜分析了其不同条件变形后的显微组织。结果表明：该合金的热变形行为可用双曲正弦形式的本构方程来描述；应变速率小于1．0s叫时，随温度升高和应变速率增加，合金的变形激活能提高，应变速率为1．0s叫时，变形激活能有所下降；计算得到该合金的热变形激活能为193．029kJ·mol^-1，低于6061合金的变形激活能；该合金的热加工性能优良。
The hot compression test was performed on Al-1.04Mg-0.85Si-0.01Cu aluminum alloy by Gleeble- 1500 thermal simulation tester, the thermal deformation behavior of the alloy in the temperature range of 300-- 500 ℃and strain rate range of 0. 001- 1. 0 s l was studied, and the microstructure Was analyzed by optical microscopy after deformation under different conditions. The results show that the hot deformation behavior of the alloy could he described by a constitutive equation in hyperbolic sine function. When the strain rate was less than 1. 0 s-1 , the deformation activation energy of the alloy rose with the increase of temperature and strain rate, however, the deformation activation energy decreased when the strain rate was 1. 0 s 1. The calculated value of hot deformation activation energy of the aluminum alloy was 193. 029 kJ ~ mol 1, and it was less than the deformation activation energy of 6061 alloy. The tested alloy has excellent hot workability.
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