Q345钢热变形奥氏体晶粒尺寸的数值模拟
Numerical Simulation of Austenite Grain Size during Hot Deformation of Q345 Steel
摘 要
用Gleeble1500型热模拟机进行了单道次压缩变形试验,分析了不同变形工艺参数对Q345钢奥氏体晶粒尺寸的影响规律,根据试验结果,建立了动态再结晶数学模型及其材料数据库,并写入Marc用户子程序,利用有限元软件Marc和热力耦合弹塑性有限元法模拟了试样的压缩过程,分析计算了采用不同再结晶模型得到的再结晶晶粒尺寸.结果表明:新建立的动态再结晶模型计算的奥氏体晶粒尺寸与实测值吻合很好.
动态再结晶
奥氏体
晶粒尺寸
FEM
dynamic recrystallization
austenite
grain size
Abstract
Single pass compression tests were processed by Gleeble1500 thermal simulator in order to analyze the effects of different deformation parameters on austenite grain size.According to experimental results,the model of dynamic recrystallization and the material database of Q345 steel were made up and written in the material subprogram of Marc.Thermal-coupled Elastic-plastic finite element method was used to simulate the compress process of sample by finite element software-Marc.Different recrystallization functions were applied to simulate and calculate the grain size respectively.The results show that the austenite grain size calculated by the new dynamic recrystalliation model is in good agreement with the measured.
中图分类号 TG335.1
所属栏目
基金项目 国家自然科学基金资助项目(50334010)
收稿日期 2005/10/31
修改稿日期 2006/7/11
网络出版日期
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备注陈庆军(1969-),男,山东兖州人,博士研究生.
引用该论文: CHEN Qing-jun,KANG Yong-lin,ZHANG Yan,LI Cheng-xiang,WANG Chun-mei. Numerical Simulation of Austenite Grain Size during Hot Deformation of Q345 Steel[J]. Materials for mechancial engineering, 2006, 30(11): 85～87
陈庆军,康永林,张艳,李成香,王春梅. Q345钢热变形奥氏体晶粒尺寸的数值模拟[J]. 机械工程材料, 2006, 30(11): 85～87
被引情况:
【1】陈容, "终轧温度对钛微合金化Q345B钢组织与力学性能的影响",机械工程材料 39, 48-51(2015)
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参考文献
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【2】Maccagno T M,Jonas J J,Hodgson P D.Spreadsheet modeling of grain size evolution during rod rolling[J].ISIJ International,1996,36(6):720-728.
【3】Elwazri A M,Wanjara P,Yue S.Dynamic recrystallization of austenite in microalloyed high carbon steels[J].Materials Science and Engineering,2003,A339:209-215.
【4】Poliak E I,Jonas J J.Initiation of dynamic recrystallization in constant strain rate hot deformation[J].ISIJ International,2003,43(5):684-691.
【5】Schindler I,Hadasik E.A new model describing the hot stress-strain curves of HSLA steel at high deformation[J].Materials Processing Technology,2000,106:131-135.
【6】Bontcheva N,Petzov G.Microstructure evolution during metal forming processes[J].Computational Materials Science,2003,28:563-573.
【7】李壮,张平礼,周晓光,等.热轧钢板奥氏体再结晶晶粒尺寸的预测模型[J].机械工程材料,2005,29(9):16-17.
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