| 含Nb微合金钢动态再结晶行为 |
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| 引用本文： | 董毅,许云波,肖宝亮,吴迪.含Nb微合金钢动态再结晶行为[J].东北大学学报(自然科学版),2008,29(10):1431-1434. |
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| 作者姓名： | 董毅 许云波 肖宝亮 吴迪 |
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| 作者单位： | 东北大学轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004 |
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| 摘 要： | 用Gleeble-2000热模拟实验机对实验钢进行高温单道次压缩实验,研究了实验钢动态再结晶行为.实验结果表明:实验钢动态再结晶激活能为304.711 kJ/mol;在较高温度和低应变速率条件下实验钢易于发生动态再结晶,随着lnZ的减小,实验钢应力-应变曲线由动态回复型变为动态再结晶型;当lnZ<22.61时,曲线上出现多个峰值,呈间断式动态再结晶型;峰值应力、峰值应变和临界应变与lnZ呈线性关系;动态再结晶开始时间随着应变速率的增大和温度的升高而缩短.
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| 关 键 词： | 动态再结晶 激活能 数学模型 峰值应力/应变 |
Study on Dynamic Recrystallization Behavior of Nb-Microalloyed Steel |
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| DONG Yi,XU Yun-bo,XIAO Bao-liang,WU Di.Study on Dynamic Recrystallization Behavior of Nb-Microalloyed Steel[J].Journal of Northeastern University(Natural Science),2008,29(10):1431-1434. |
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| Authors: | DONG Yi XU Yun-bo XIAO Bao-liang WU Di |
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| Institution: | DONG Yi,XU Yun-bo,XIAO Bao-liang,WU Di(The State Key Laboratory of Rolling , Automation,Northeastern University,Shenyang 110004,China.) |
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| Abstract: | The dynamic recrystallization behavior of the specimens of Nb-microalloyed steel was tested on Gleeble-2000 thermomechanical simulator by way of single pass at high temperature.The results revealed some facts about the specimen as follows.The dynamic recrystallization of which the activation energy 304.711 kJ/mol is liable to occur at higher temperature and lower strain rate,and the stressstrain curve in form of dynamic recovery changes into dynamic recrystallization with decreasing lnZ.The curves present s... |
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| Keywords: | dynamic recrystallization activation energy mathematical model peak stress/strain |
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