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| Effect of heat input on microstructure and toughness of rare earthcontained C�CMn steel |
| Ming-ming Song1,2 ? Bo Song3 ? Sheng-hua Zhang3 ? Zhan-bing Yang3 ? Zheng-liang Xue1,2 ? Sheng-qiang Song1,2 ? Run-sheng Xu1,2 ? Zhi-bo Tong4 |
| 1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 3 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 4 The Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology, Yangtze Normal University, Chongqing 408100, China |
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Abstract Gleeble-1500D thermal simulator was used to simulate the thermal cycle of different welding processes in C�CMn steel. The toughness of steel matrix and heat-affected zone (HAZ) was investigated, and the microstructure and inclusion were characterized as well. The results showed that the welding process has a great influence on the microstructure in HAZ. When t8/5 (the cooling time from 800 to 500 C) value of the welding process is less than 111 s, the microstructure in HAZ is mainly bainite/Widmansta��tten in spite of the addition of rare earth. However, when t8/5 value is more than 250 s, there are a lot of acicular ferrites in the steel containing rare earth, while the main microstructures are grain boundary ferrite and bainite/Widmansta��tten in the steel without rare earth. The impact toughness of the HAZ at ambient temperature first decreases and then increases with the increase in t8/5 value. The impact toughness is the worst when t8/5 value is 111 s. Rare earth can improve the impact performance of HAZ at ambient temperature, especially when t8/5 value of the welding process is 445 s. After the rare earth treatment, the cooling rate of forming acicular ferrite is about 0.5�C7.5 C/s. Acicular ferrite can form even during the welding process with larger t8/5 value up to 600 s in rare earth-treated steel.
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Received: 17 July 2017
Published: 14 November 2018
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| [1] |
Q. Sun, H. S. Di, J. C. Li, B. Q. Wu, R. D. K. Misra, Mater. Sci. Eng., A. 669(2016) 150-158.
|
| [2] |
W. L. Costin, O. Lavigne, A. Kotousov, Mater. Sci. Eng., A. 663(2016) 193-203.
|
| [3] |
B. Beidokhti, P. He, A. H. Kokabi, A. Dolati, Mater. Sci. Technol. 33(2017) 408-414.
|
| [4] |
S. Mizoguchi, J. Takamura, Proc. 6th. Int. Iron and Steel Cong., ISIJ, Nagoya, 1990, pp. 598-605
|
| [5] |
M. Lee, N. Kang, S. Liu, K. Cho, Sci. Technol. Weld. Joining. 21 (2016) 711-719.
|
| [6] |
X. L. Wan, R. Wei, K. M. Wu, Mater. Charact. 61(2010) 726-731.
|
| [7] |
K. M. Wu, Scr. Mater. 54(2006) 569-574.
|
| [8] |
X. L. Wan, K. M. Wu, G. Huang, R. Wei, L. Cheng, Int. J. Miner. Metall. Mater. 21(2014) 878-885.
|
| [9] |
X. L. Wan, K. M. Wu, L. Cheng, R. Wei, ISIJ Int. 55(2015) 679-685.
|
| [10] |
L. Wang, Q. Lin, L. Yue, L. Liu, F. Guo, F. M. Wang, J. Alloys Compd. 451(2008) 534-537.
|
| [11] |
G. Thewlis, W. T. Chao, P. L. Harrison, A. J. Rose, Mater. Sci. Technol. 7(2008) 771-786.
|
| [12] |
G. Thewlis, Mater. Sci. Technol. 22(2006) 153-166.
|
| [13] |
B. Wen, B. Song, Steel Res. Int. 83(2012) 487-495.
|
| [14] |
B. Wen, B. Song, N. Pan, Q. F. Shu, X. J. Hu, J. H. Mao, J. Iron. Steel Res. Int. 18(2011) 38-44.
|
| [15] |
M. M. Song, B. Song, W. B. Xin, G. L. Sun, G. Y. Song, C. L. Hu, Ironmaking Steelmaking. 42(2015) 594-599.
|
| [16] |
M. H. Shi, P. Zhang, C. Wang, F. X. Zhu, ISIJ Int. 54(2014) 932-937.
|
| [17] |
J. Hu, L. Du, J. Wang, C. R. Gao, Mater. Sci. Eng., A. 577(2013) 161-168.
|
| [18] |
X. L. Wan, K. M. Wu, G. Huang, K. C. Nune, Y. Li, Sci. Technol. Weld. Joining. 21(2016) 295-302.
|
| [19] |
Y. Li, X. L. Wan, W. Y. Lu, A. A. Shirzadi, O. Isayev, O. Hress, K. M. Wu, Mater. Sci. Eng., A. 659(2016) 179-187.
|
| [20] |
M. M. Song, B. Song, S. H. Zhang, Z. L. Xue, Z. B. Yang, R. S. Xu, ISIJ Int. 57(2017) 1261-1267.
|
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| [6] |
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2018, Vol. 25 
