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

作　　者：乔慧娟[1] 李付国[1] 冀国良[1] 肖美立[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《稀有金属材料与工程》2014年第4期926-931,共6页Rare Metal Materials and Engineering

基　　金：航空科学基金(2011ZE53059);国家自然科学基金(51275414)

摘　　要：通过热模拟压缩试验研究了Aermet100钢在应变速率为0．01～50s-1，变形温度为1073～1473K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。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.

关 键 词：AERMET100钢 本构关系 热加工图 变形特征 

分 类 号：TG142.1[一般工业技术—材料科学与工程]