本文采用单道次和双道次压缩实验研究超高强度微合金Ti复相钢（CP钢）在变形温度为800～1150℃,应变速率为0.1～10 s-1条件下的再结晶行为,观察了各种变形条件下的对再结晶行为的影响.研究发现,高的钛含量明显提高了动态再结晶和静态再结晶的激活能.通过扫描电镜发现,细小氮化钛和碳化钛分布在奥氏体基体及晶界处,其颗粒大小在50——200nm之间.动力学曲线和金相表明,实验钢的未再结晶的临界温度介于1000-950℃之间.实验钢动态再结晶的峰值应要明显高于一般碳锰钢.基于动力学曲线,建立了实验钢静态再结晶的本构方程.
The dynamic and static recrystallization behavior of a 0.11%（in mass） Ti-microalloyed complex phase steel（CP steel） were studied by single-hit hot compression and double-hit isothermal hot compression tests.The influences of different deforming temperature,strain rate,strain and different holding times on microstructure transformation were investigated.It was found that the high contain of micro-alloyed element Ti improved the deformation activation energy of dynamic and static recrystallization.The precipitations was fine Ti（CN） located at the grain boundary and the austenitic matrix,and the size of precipitations is about 50nm-200nm.The calculated kinetic results and microstructures show that the no-recrystallization temperature（Tnr） is about 950℃.Based on the stress-strain curves,a kinetic equation was estabilished to predict the static recrystallization fraction of Ti-microalloyed steel.
参考文献
| [1] | R. Mendoza;J. Huante;M. Alanis;C. Gonzalez-Rivera;J. A. Juarez-Islas .Processing of ultra low carbon steels with mechanical properties adequate for automotive applications in the as-annealed condition[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):203-209. |
| [2] | Zhao-hui Zhang;Yong-ning Liu;Xiao-kai Liang;Yuan She .The effect of Nb on recrystallization behavior of a Nb micro-alloyed steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):254-260. |
| [3] | A.I. Fernandez;P. Uranga;B. Lopez .Dynamic recrystallization behavior covering a wide austenite grain size range in Nb and Nb-Ti microalloyed steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):367-376. |
| [4] | YANG Jing-hong,LIU Qing-you,SUN Dong-bai,LI Xiang-yang.Recrystailization Behavior of Deformed Austenite in High Strength Microalloyed Pipeline Steel[J].钢铁研究学报（英文版）,2009(01):75-80. |
| [5] | E.I.POLIAK;J.J.JONAS .A ONE-PARAMETER APPROACH TO DETERMINING THE CRITICAL CONDITIONS FOR THE INITIATION OF DYNAMIC RECRYSTALLIZATION[J].Acta materialia,1996(1):127-136. |
| [6] | G.LI;T.M.Maccagno .Effect of Initial Grain Size on the Static Recrystallization Kinetics of Nb Microalloyed Steels[J].ISIJ International,1996(12):1479-1485. |
| [7] | Manuel Gorriez;Lucia Rancel;Bernardo J. Fernandez;Sebastian F. Medina .Evolution of austenite static recrystallization and grain size during hotrolling of a V-microalloyed steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2009(1/2):188-196. |
| [8] | HAIWEN LUO;JILT SIETSMA;SYBRAND VAN DER ZWAAG .A Metallurgical Interpretation of the Static Recrystallization Kinetics of an Intercritically Deformed C-Mn Steel[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2004(6):1889-1898. |
| [9] | Zahiri SH;Byon SM;Kim SI;Lee Y;Hodgson PD .Static and metadynamic recrystallization of interstitial free steels during hot deformation[J].ISIJ International,2004(11):1918-1923. |
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