Aermet100钢高温变形行为及热加工图研究

Deformation Behavior at Elevated Temperature and Processing Map of Aermet100 Steel

摘要:

通过热模拟压缩试验研究了Aermet100钢在应变速率为0.01~50 s-1，变形温度为1073~1473 K和变形程度为0.05~0.9条件下的热变形行为，并采用正交分析方法研究了工艺参数(应变、应变速率、变形温度)对Aermet100钢热变形流动应力的影响规律，建立了基于正交分析的回归型Aermet100钢的热变形本构方程。综合考虑应变速率和变形温度对材料微观结构及性能的影响，依据动态材料模型(DMM)建立了基于本构方程的Aermet100钢的热加工图，并利用热加工图确定了Aermet100钢热变形时的流变失稳区，分析讨论了不同区域的Aermet100钢的高温变形特征。

Abstract:

Constitutive analysis for hot working of Aermet100 steel was carried out using experimental stress-strain data from isothermal hot compression tests, in a wide range of temperatures (1073~1473 K), strains (0.05~0.9) and strain rates (0.01~50 s-1). A constitutive equation based on orthogonal experiment has been established considering the independent effects of strain, strain rate and temperature. With consideration of the effects of the deformation temperatures and the stain rates on microstructures and properties of Aermet100 steel, processing maps were established based on the dynamic material model (DMM). And the instability zones of flow behavior could also be recognized by the maps. The hot deformation characteristics of Aermet100 steel in different zones were also analyzed.