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中文摘要：
对Inconel625合金在1000-1200℃,应变速率为10-80 s~（-1）条件下的热模拟压缩实验结果进行分析,修正了实验中由于高速变形产生的热效应引起的真应力-真应变曲线上流动应力的误差,通过回归分析建立了Inconel625合金高温高速下的本构模型.变形后的微观组织分析结果表明,提高变形速率是细化最终晶粒尺寸的重要途径,但过高的变形速率容易产生残余孪晶。在适当的温度（1050℃）与应变速率（50 s~（-1））下,合金具有均匀而细小的理想组织。
英文摘要：
The hot compression test results of Inconel625 alloy have been analyzed and the errors in flow stress caused by thermal effect were corrected.The true stress-strain curves were obtained at the temperature of 1000-1200℃and the strain rates of 10-80 s~（-1）.Constitutive equation of lnconel625 alloy at high temperature and high speed was established by curvilinear regression method.The microstructure after deformation showed that enhancing strain rate can refine microstructure well,but there would be twinning remained when the strain rate was overly high.The microstructure would be most homogenous and finest under acceptable temperature（1050℃） and strain rate（50 s~（-1））.
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