MODELING OF STATIC RECRYSTALLIZATION KINETICS OF Nb-BEARING STEELS
来源期刊：Acta Metallurgica Sinica2006年第4期
论文作者：D. Wu S.H. Jiao L.Q. Ma X.Q. Yuan Z.Y. Liu
Key words：Nb-bearing steel; static recrystallization; TP (start temperature of strain-induced precipitation); activation energy;
Abstract: By using isothermal double hit compression tests and applying the 2% offset method, a new model was developed to predict the microstructural evolution of Nb-bearing steels at temperatures above and below the start temperature of strain-induced precipitation (TP). The TP was developed as a function of true strain, initial austenite grain size and the Nb content.The activation energy of static recrystallization (Qrex) was expressed as a function of the content of different alloy elements. It was found that Nb played the most important role in increasing the value of Qrex The microstructural observations and measurements confirmed the validity of the model developed in the present investigation.
D. Wu1，S.H. Jiao2，L.Q. Ma1，X.Q. Yuan1，Z.Y. Liu1
(1.The State Key Laboratory of Rolling and Automation, Northeastern University,Shenyang 110004, China;
2.Institute of Research and Development, Baosteel Co., Ltd, Shanghai 201900, China)
Abstract:By using isothermal double hit compression tests and applying the 2% offset method, a new model was developed to predict the microstructural evolution of Nb-bearing steels at temperatures above and below the start temperature of strain-induced precipitation (TP). The TP was developed as a function of true strain, initial austenite grain size and the Nb content.The activation energy of static recrystallization (Qrex) was expressed as a function of the content of different alloy elements. It was found that Nb played the most important role in increasing the value of Qrex The microstructural observations and measurements confirmed the validity of the model developed in the present investigation.
Key words:Nb-bearing steel; static recrystallization; TP (start temperature of strain-induced precipitation); activation energy;
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