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在Gleeble-3500热模拟机上,获得了C71500白铜合金在1073～1273 K温度范围和0.01～10 s-1应变速率范围下等温压缩试验的真实应力应变数据.采用Johnson-Cook、改良Johnson-Cook、Zerilli-Armstrong、Arrhenius、Fields-Backofen-Zhang和Zhou-Guan模型对高温流动应力本构方程进行了回归分析.通过比较精度、相关系数(R)、均方根误差(RMSE)、平均绝对相对误差(AARE)、不确定度和计算时间,评价了6种模型的适用性.根据参数和时间消耗的拟合结果,Zhou-Guan(Z-G)模型是预测C71500合金在不同应变率和温度下变形抗力的最佳模型.建立了C71500合金最合适的热变形本构方程,为该合金热加工工艺设计和热变形过程模拟分析提供了基础数据.另外,该研究方法可以为同一领域的研究提供重要的参考.“,”Base on the Gleeble-3500 thermo mechanical simulator,the real stress-strain data of C71500 cupronickel alloy in isothermal compression test were obtained in the temperature range of 1073～1273 K and strain rate range of 0.01～10 s-1.Johnson-Cook,modified Johnson-Cook,modified Zerilli-Armstrong,Arrhenius-type,Fields-Backofen-Zhang and Zhou-Guan models were used to regress the constitutive equation of high temperature flow stress.The applicability of the six models was evaluated by comparing the accuracy,correlation coefficient(R),root mean square error(RMSE),average absolute relative error(AARE),the number of uncertainty and the time consuming for calculation of these parameters.According to the fitting results of parameters and time consumption,the Zhou-Guan model is the best for predicting the deformation resistance of C71500 alloy at different strain rates and temperatures.The most suitable thermal deformation constitutive equation of C71500 alloy is established,which will provide the basic data for the design of the hot working process and the simulation analysis of the thermal deformation process of the alloy.In addition,this research can provide important reference in the same field.