|
|
|
| A Physically Based Dynamic Recrystallization Model Considering Orientation Effects for a Nitrogen Alloyed Ultralow Carbon Stainless Steel during Hot Forging |
| Gan- lin XIE1,An HE1,Hai- long ZHANG1,Gen- qi WANG2,Xi- tao WANG3 |
1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
2.Yantai Taihai- Manoir Nuclear Power Equipment Corporation, Yantai 264003, Shandong,China
3. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing,Beijing 100083, China |
|
|
|
|
Abstract The nitrogen alloyed ultralow carbon stainless steel is a good candidate material for primary loop pipes of AP1000 nuclear power plant. These pipes are manufactured by hot forging, during which dynamic recrystallization acts as the most important microstructural evolution mechanism. A physically based model was proposed to describe and predict the microstructural evolution in the hot forging process of those pipes. In this model, the coupled effects of dislocation density change, dynamic recovery, dynamic recrystallization and grain orientation function were considered. Besides, physically based simulation experiments were conducted on a Gleeble- 3500 thermo- mechanical simulator, and the specimens after deformation were observed by optical metallography (OM) and electron back- scattered diffraction (EBSD) method. The results confirm that dynamic recrystallization is easy to occur with increasing deformation temperature or strain rate. The grains become much finer after full dynamic recrystallization. The model shows a good agreement with experimental results obtained by OM and EBSD in terms of stress- strain curves, grain size, and recrystallization kinetics. Besides, this model obtains an acceptable accuracy and a wide applying scope for engineering calculation.
|
|
Received: 15 January 2015
Published: 14 April 2016
|
| Fund:National High-Tech Research and Development Program of China;National High-Tech Research and Development Program of China;National Science and Technology Major Project of China |
|
Corresponding Authors:
Ganlin Xie
E-mail: amingoxie@gmail.com
|
|
|
|
| [1] |
Zong-ye Ding,Di Zhang,Qiao-dan Hu,,*,Long Zeng,Jian-guo Li,. Constitutive analysis and optimization on hot working parameters of as-cast high Cr ultra-super-critical rotor steel with columnar grains[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 916-924. |
| [2] |
YIN Cun-hong��LIANG Yi-long. Friction induced wear and martensite deformation behavior of 20CrNi2Mo steel[J]. Chinese Journal of Iron and Steel, 2017, 52(8): 81-86. |
| [3] |
Zhi-gang Song,En-xiang Pu,. Precipitated phases of superaustenitic stainless steel 654SMO[J]. Chinese Journal of Iron and Steel, 2017, 24(7): 743-749. |
| [4] |
Jia-long Tian,,Wei Wang,,Wei Yan,,Zhou-hua Jiang,Yi-yin Shan,,Ke Yang. Microstructure characteristics of segregation zone in 17-4PH stainless steel piston rod[J]. Chinese Journal of Iron and Steel, 2017, 24(7): 718-723. |
| [5] |
Yong-xing Jiao,Jian-sheng Liu*,Xing-wang Duan,Xiao-hua Zheng,Wen-wu He. Prediction of critical forging penetration efficiency for 06Cr19Ni9NbN steel by dynamic recrystallization[J]. Chinese Journal of Iron and Steel, 2017, 24(6): 649-653. |
| [6] |
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. |
|
|
|
|
2016, Vol. 23 
