|
|
|
| Microstructure and Mechanical Properties of Direct Quenched and Tempered N610E Steel for Oil Storage Tank |
| YU Wei1,WU Hui-bin1,WANG Li-jun1,HUO Song-bo2,ZHU Rui-rong2,LIN Guo-qiang2 |
1. National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China
2. Department of Technology and Quality, Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu, China |
|
|
|
|
Abstract N610E grade steel (12MnNiVR) for oil storage tank is normally produced by reheating quenching and tempering process. Effects of tempering temperature on the microstructure and mechanical properties of the direct-quenched N610E steels were investigated by OM, TEM and other experimental methods. The results indicate that: after direct quenched and tempered at 655℃, the tested steel obtains the optimum comprehensive mechanical properties with tensile strength of 640MPa, yield strength of 570MPa, elongation of 22% and impact energy of 273J at -20℃, brittle transition temperature of N610E steel tempered at different temperature are lower than -60℃. The recovery of lath bainite becomes gradually obvious with increasing tempering temperature through motion, merging and reorganization of dislocations, which cause lath wider. Mechanical properties variation with tempering temperature shows non-monotonic nature, which attributes to the comprehensive mechanism including recovery and softening process of substructure, and the strengthening mechanism due to carbon dissolution and the second phase precipitation in bainite during tempering.
|
|
Received: 07 July 2010
Published: 28 September 2011
|
|
|
|
| [1] |
SUN Chao-fan, FANG Yuan, WANG Ya-qing, LIU Wei. Influence of temper rolling reduction rate on microstructure and mechanical properties of TS290 steel[J]. Iron and Steel, 2020, 55(6): 75-79. |
| [2] |
WEI Tong-yu, ZOU De-ning, ZHANG Ying-bo, CHEN Wan-wan. Effect of aluminum on microstructure and properties of high alumina ferritic heat resistant steel[J]. Iron and Steel, 2020, 55(6): 80-83. |
| [3] |
JIANG Yue-yue, WANG Zhao-dong, DENG Xiang-tao. Effect of trace rare earth Ce on martensitic transformation behavior of ultra-high strength low alloy steel[J]. Iron and Steel, 2020, 55(6): 84-90. |
| [4] |
ZHAO Yun-peng, YU Chao, XIAO Hong, WU Zong-he, XU Peng-peng, XIE Hong-biao. Effect of pure iron interlayer on mechanical properties of hot rolled stainless steel clad plate[J]. Iron and Steel, 2020, 55(5): 73-79. |
| [5] |
SHAO Cheng-wei, WANG Jun-tao, ZHAO Xiao-li, HUI Wei-jun. Microstructure and mechanical properties of intercritically annealed Al-contain medium Mn steel[J]. Iron and Steel, 2020, 55(5): 87-93. |
| [6] |
GUO De-ying, LI Dong-tao, ZHANG Xiao-ming, MA Chao, DAI Xin, LIU Yang. Optical structure and thermal and cold properties of different rank coal coke[J]. Iron and Steel, 2020, 55(4): 20-26. |
|
|
|
|
2011, Vol. 46 
