摘要
采用Thermecmastor-Z热模拟试验机研究了EH40船板钢在850~1050℃,0.005~10 s-1条件下的热变形行为,通过动态材料模型得到该区域的热变形与变形抗力方程并建立了EH40船板钢热加工图。结果表明,EH40船板钢的变形抗力模型的预测值与试验值吻合良好,EH40船板钢的热变形激活能为324.479 kJ/mol,由热加工图确立出EH40船板钢最优的热加工窗口是应变不高于0.4,温度在850~1050℃,应变速率为小于10 s-1的加工区域,较易发生动态再结晶。
The hot deformation behavior of a EH40 ship plate steel was studied by a Thermecmastor-Z simulator in the temperature range of 850-1 050 ℃ at strain rates of 0.005-10 s-1. The hot deformation equation of the steel was determined and the processing map based on the dynamic material model(DMM) was also established. The results show that the predicted value of deformation resistance model of EH40 ship plate steel is in good agreement with the measured data, the activation energy of EH40 ship plate steel for hot deformation is 324.479 kJ/mol, the optimum processing window for hot deformation of EH40 ship plate steel is identified as 850-1 050 ℃, strain rate less than 10 s-1and strain not higher than 0.4 when dynamic recrystallization easily happened.
作者
张鑫
李胜利
边首缘
严玲
ZHANG Xin;LI Sheng-li;BIAN Shou-yuan;YAN Ling(School of Materials and Metallurgy,University of Science and Technology,Anshan 114051,Liaoning,China;State Key Laboratory of Metal Material for Marine Equipment and Application*Anshan 114009,Liaoning,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2020年第5期423-428,共6页
Journal of Iron and Steel Research
基金
海洋装备用金属材料及其应用国家重点实验室开放基金资助项目(SKLMEA-K201801)
关键词
流变应力
形变激活能
动态再结晶
热加工图
flow stress
deformation activation energy
dynamic recrystallization
processing map
