|
|
|
| Continuous Cooling Transformation Behavior and Kinetic Models of Transformations for an Ultra-Low Carbon Bainitic Steel |
| ZHANG Zhi-min,CAI Qing-wu,YU Wei,LI Xiao-lin,WANG Li-dong |
| Metallurgical Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China |
|
|
|
|
Abstract The aim was to investigate transformation behavior and transformation kinetics of an ultra-low carbon bainitic steel during continuous cooling. Continuous cooling transformation (CCT) curves of tested steel were measured by thermal dilatometer and metallographic structures at room temperature were observed by optical microscope. Then transformation kinetic equation of austenite to ferrite as well as austenite to bainite was established by analyzing the relationship of lnln��1/(1-f)�� and lnt in the kinetic equation on the basis of processed experimental data. Finally, the measured and calculated kinetic behaviors of the steel during continuous cooling were compared and growth patterns of transformed ferrite and bainite were analyzed. Results showed that calculated result was in reasonable agreement with the experimental data. It could be concluded that the growth modes of transformed ferrite and bainite were mainly one dimension as the Avrami exponents were between 1 and 2.
|
|
Received: 23 September 2011
Published: 27 December 2012
|
|
Corresponding Authors:
Zhi-Min ZHANG
E-mail: 2001zhimin@163.com
|
|
|
|
| [1] |
Hao Li,Yan-chong Yu,,Xiang Ren,Shao-hua Zhang,She-bin Wang,,*. Evolution of Al2O3 inclusions by cerium treatment in low carbon high manganese steel[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 925-934. |
| [2] |
Ying-yi Zhang,Wei Lv,Xue-wei Lv,Chen-guang Bai,Ke-xi Han,Bing Song. Oxidation kinetics of ilmenite concentrate by non-isothermal thermogravimetric analysis[J]. Chinese Journal of Iron and Steel, 2017, 24(7): 678-684. |
| [3] |
Jian-guo Chen,Yong-chang Liu,Chen-xi Liu,Bi-yu Yan,Hui-jun Li. Effects of tantalum on austenitic transformation kinetics of RAFM steel[J]. Chinese Journal of Iron and Steel, 2017, 24(7): 705-710. |
| [4] |
Hong-huan Mao,Xing Qi,Jing Cao,Li-cong An,Yi-tao Yang*. Effect of Si on high temperature oxidation of 30Cr13 stainless steel[J]. Chinese Journal of Iron and Steel, 2017, 24(5): 561-566. |
| [5] |
Hui Guo,Peng Zhou,*,Ai-min Zhao,,Chao Zhi,Ran Ding,Jia-xing Wang. Effects of Mn and Cr contents on microstructures and mechanical properties of low temperature bainitic steel[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 290-295. |
| [6] |
Yang-huan Zhang,,*,Zhong-hui Hou,,Ying Cai,Hong-wei Shang,Yan Qi,Dong-liang Zhao. Structures and electrochemical performances of as-cast and spun RE-Mg-Ni-Mn-based alloys applied to Ni-MH battery[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 296-305. |
|
|
|
|
2012, Vol. 19 
