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| EFFECT OF COOLING PATH ON THE HOLE-EXPANSION PROPERTY OF MEDIUM CARBON STEEL |
| WANG Bin, LIU Zhenyu, ZHOU Xiaoguang, WANG Guodong |
| State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819 |
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Cite this article:
WANG Bin, LIU Zhenyu, ZHOU Xiaoguang, WANG Guodong. EFFECT OF COOLING PATH ON THE HOLE-EXPANSION PROPERTY OF MEDIUM CARBON STEEL. Acta Metall Sin, 2012, 48(4): 435-440.
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Abstract In the present paper, ultra fast cooling (UFC) technology was applied in the cooling process to treat medium carbon steels after hot strip rolling, and the finish rolling temperature and UFC stop temperature are controlled as the important parameters. The effects of cooling path on the microstructure and hole-expansion property of annealing medium carbon steels were investigated. The results show that finely dispersed spherical cementite could be formed in ferrite matrix after annealing treatment. With decreasing the fininsh rolling temperature and UFC stop temperature, the spheroidized cementites after annealing were more homogeneous and dispersed finely. During hole-expansion test, cracks were observed to form usually in the edge region around the punched hole when the tangential elongation exceeded the forming limit, and cracks are mainly formed in the way of micro-voids coalescence. Fine and homogeneous microstructure comprised of ferrite and spheroidized cementite could improve the elongation of the experimental sheets, suppressing the coalescence of micro-voids, and improving the hole-expansion property.
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Received: 28 November 2011
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| Fund: ;The Fundamental Research Funds for the Central Universities |
| [1] Hu C L, Zhao Z, Yin G R, Yuan Z F, Xu X L. Trans Nonferr Met Soc China, 2009; 19(suppl 3): s552[2] Zhang X Q, Peng Y H, Ruan X Y, Yamazaki K. J Mater Process Technol, 2006; 174(1--3): 74[3] Lin H S, Lee C Y, Wu C H. Int J Machine Tools Manuf, 2007; 47: 168[4] Fujita T, Nakamura N, Iizuka S. JFE Technol Rep, 2004; (4): 44[5] Comstock R J, Jr Scherrer D K, Adamczyk R D. J Mater Eng Perform, 2006; 15: 675[6] Fang X, Fan Z, Ralph B. J Mater Sci, 2003; 38: 3877[7] Cho Y R, Chung J H, Ku H H, Kim I B. Met Mater, 1999; 5: 571[8] Takechi H. Proc 5th Int Conf on HSLA Steels. China: The Chinese Society for Metals, 2005: 58[9] Kagechika H. ISIJ Int, 2006; 46: 939[10] Shimizu T, Funakawa Y, Kaneko S. JFE Technol Rep,2004; (4): 25[11] Funakawa Y, Shiozaki T, Tomita K, Yamamoto T, Maeda E. ISIJ Int, 2004; 44: 1945[12] Takasashi M. Nippon Steel Technol Rep, 2003; 88: 3[13] Liu X H, Yu G F, Jiao J M, Zhang Z P, Peng L G, Wang G D. Iron Steel, 2004; 39(8): 71 (刘相华, 余广夫, 焦景民, 张中平, 彭良贵, 王国栋. 钢铁, 2004; 39(8): 71)[14] Buzzichelli G, Anelli E. ISIJ Int, 2002; 42: 1354[15] Wang G D. Shanghai Met, 2008; 30(2): 1 (王国栋. 上海金属, 2008; 30(2): 1)[16] Leeuwe Y V, Onink M, Sietsm J. ISIJ Int, 2001; 41: 1037[17] O'Brien J M, Hosford W F. Metall Mater Trans,2002; 33A: 1255[18] Hyun D I, Oak S M, Kang S S, Moon Y H. J Mater Process Technol, 2002; 130: 9[19] Williams D B, Carter C B. Transmission Electron Microscopy: A Textbook for Materials Science. Beijing: Tsinghua University Press,2007: 365 (Williams D B, Carter C B. 透射电子显微学: 材料科学教程, 北京:清华大学出版社, 2007: 365)[20] Yong Q L. Secondary Phases in Steels. Beijing:Metallurgical Industry Press, 2006: 32 (雍启龙. 钢铁材料中的第二相. 北京: 冶金工业出版社, 2006: 32)[21] Vedula K M, Heckel R W. Metall Mater Trans, 1970; 1B:9[22] Gang U G, Lee J C, Nam W J. Met Mater Int, 2009; 15: 719[23] Fargas G, Anglada M, Mateo A. J Mater ProcessTechnol, 2009; 209: 1770 |
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