摘要
在Gleeble-3800热力模拟试验机上进行了04Cr13Ni5Mo马氏体不锈钢的热压缩实验。研究了变形温度为950~1200℃,应变速率为0.001~0.1 s^(-1)条件下的热变形行为;构建了3种不同的本构模型,并结合误差分析进行了对比。结果表明:该钢的热变形真应力-真应变曲线可分为加工硬化、动态回复和动态再结晶3个阶段。3种模型中,修正的Fields-Backofen、应变补偿的Arrhenius和两段式的高温本构关系模型的平均绝对相对误差分别为7.06%、6.89%和5.43%,均方根误差分别为5.29、5.16和4.49 MPa。修正的Fields-Backofen模型预测精度相对较低。应变补偿的Arrhenius模型对应力-应变曲线上的加工硬化阶段的预测精度较低。而两段式的高温本构模型的整体预测精度明显高于前两种模型,且高温低应变速率下应力-应变曲线的预测精度较高。
Hot compression tests were carried out for 04Cr13Ni5Mo martensitic stainless steel using the Gleeble-3800 thermal simulation experimental machine.The hot deformation behavior under the conditions of deformation temperature of 950-1200℃ and the strain rate of 0.001-0.1 s^(-1) was investigated.Three different constitutive models were constructed and compared through error analysis.The results show that the hot deformation true stress-true strain curves of steel can be divided into three stages:work hardening,dynamic recrystallization and dynamic recovery.Among the three models,the average absolute relative errors of the modified Fields-Backofen,the strain-compensated Arrhenius and the two-stage high-temperature constitutive relationship model are 7.06%,6.89%and 5.43%,respectively,and the root mean square errors are 5.29,5.16 and 4.49 MPa,respectively.The modified Fields-Backofen model has relatively low prediction accuracy.The strain-compensated Arrhenius model has low prediction accuracy for the work hardening stage of the stress-strain curve.The overall prediction accuracy of the two-stage high-temperature constitutive model is significantly higher than that of the two models,and the prediction accuracy of the stress-strain curves at low strain rate and high temperature is higher.
作者
宋岳峰
王魁
陈慧琴
孙统辉
SONG Yue-feng;WANG Kui;CHEN Hui-qin;SUN Tong-hui(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Luoyang CITIC Heavy Industries Casting and Forging,Luoyang 471039,China;CITIC Heavy Industries Co.,Ltd.,Luoyang 471039,China)
出处
《塑性工程学报》
北大核心
2025年第7期184-191,共8页
Journal of Plasticity Engineering
基金
河南省重大科技专项(221100230200)。
