中文摘要：

在Gleeble-3500D热模拟试验机上,对挤压态CuCr25合金在应变速率为0.01-10s^-1,变形温度为750-900℃的条件下进行恒温压缩模拟实验.结果表明：挤压态CuCr25合金在热变形过程中流变应力随变形温度升高和应变速率降低而减小;可用双曲正弦模型来描述合金的流变行为,其平均激活能为383.4kJ/mol;基于动态材料模型获得了挤压态CuCr25合金的热加工图,并结合金相显微组织分析得到了该合金在实验参数范围内较优的热加工工艺参数范围：加工温度830-900℃,应变速率为0.01-0.1s-1.

英文摘要：

Isothermal compression tests of extruded CuCr25 alloy were carried out at the temperature range of 750-900 ℃ and at the strain rate range of 0.01-10s^-1 on Gleeble-3500 Dsystem.The experiment results showed that the flow stress decreased with the increase of deformation temperature and the decrease of strain rate,which could be described by hyperbolic-sine equation with the average hot deformation activation energy Q of 383.4kJ/mol.The processing maps were calculated on the basis of the dynamic materials model.The optimum processing parameters were proved to be the deformation temperature range of 830-900 ℃ and the strain rate range of 0.01-0.1s^-1 was obtained by processing maps and deformed microstructural observation.