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在应变速率为10-1～10-1s-1和温度为250～450℃范围内对2524铝合金板材进行单向热拉伸试验,研究了热变形参数对其显微组织及力学性能的影响.结果表明,当温度为400℃,应变速率为10 3 s1时,2524铝合金开始表现出动态再结晶特征,升高温度以及降低应变速率,均有利于动态再结晶发生.在温度为250℃,应变速率为10-1s-1时,抗拉强度最高为312MPa,伸长率最低为13％.当温度恒定为250℃时,随应变速率的减小,抗拉强度降低42.9％,伸长率提高15.4％;当应变速率恒定为10-1 s-1时,随温度的升高,抗拉强度降低77.2％,伸长率提高285％,断口呈韧性断裂.“,”Tensile tests for 2524 aluminum alloy sheet were carried out at 250～450 ℃ and 10-1～10-4 s-1.The effects of thermal deformation parameters on microstructure and mechanical properties of 2524 alloy were investigated.The results reveal that the alloy begins to exhibit dynamic recrystallization characteristics at 300 ℃ under strain rate of 10-3s-1.With increasing in temperature and decreasing in strain rate,dynamic recrystallization more easily appears.When the temperature is 250℃ and the strain rate is 10-1s-1,the tensile strength reaches maximum value of 312 MPa,and the elongation reaches minimum value of 13％.At 250 ℃,the tensile strength is decreases by 42.9％ and the elongation is increases by 15.4％ with the decrease of strain rate.At 10-1s-1,the tensile strength is decreases by 77.2％ and the elongation is increases by 285 ％ with the increase of temperature.The fracture is characterized by ductile fracture.