摘要
利用DIL805A/D变形热膨胀相变仪,设计了单道次热压缩实验,获得了V微合金化实验钢在变形温度1 150~950℃和应变速率1~0.01 s~(-1)内的真应力-真应变曲线,分析了变形条件对峰值应力/应变等动态再结晶特征值的影响,并基于唯象型本构关系建立了3种高温流变应力模型。结果表明:相对于应变补偿Arrhenius模型和周纪华-管克智模型,Cingara-Ebrahimi模型的精度最高,能够准确预测实验钢在不同变形条件下流变应力,对实际生产具有良好的指导作用。
The true stress-true strain curves of V-microalloyed steel at deformation temperatures of 1150~950℃and strain rates of 1~0.01s-1 were obtained by single pass hot compression experiments by using DIL805A/D dilatometer,the effects of different deformation conditions on dynamic recrystallization characteristic values such as peak stress/strain were analyzed,and three types of high-temperature flow stress models were developed based on phenomenologital constitutive relation.The results show that the Cingara-Ebrahimi model has the highest accuracy compared with the strain-compensated Arrhenius model and the Zhou-Guan model,and it can accurately predict the flow stresses of experimental steel under different deformation conditions,which is a good guide for practical production.
作者
姜淇铭
李鑫
李韶文
曹光明
刘振宇
JIANG Qiming;LI Xin;LI Shaowen;CAO Guangming;LIU Zhenyu(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,Liaoning,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2023年第11期1366-1374,共9页
Journal of Iron and Steel Research
基金
国家重点研发计划资助项目(2022YFB3304800)
辽宁省国家科技奖定向项目(应用技术类)(2022JH25/10200001)
中国博士后科学基金资助项目(2022T150205)。
关键词
V微合金钢
动态再结晶
本构关系
流变应力
数学模型
V-microalloyed steel
dynamic recrystallisation
constitutive relation
flow stress
mathematical model
