1) School of Materials Science and Technology, University of Science and Technology Beijing, Beijing 100083
2) Jiangsu Shagang Group, Zhangjiagang 215625
Cite this article:
NIE Wenjin SHANG Chengjia GUAN Hailong ZHANG Xiaobing CHEN Shaohui. CONTROL OF MICROSTRUCTURES OF FERRITE/ BAINITE (F/B) DUAL-PHASE STEELS AND ANALYSIS OF THEIR RESISTANCE TO DEFORMATION BEHAVIOR. Acta Metall Sin, 2012, 48(3): 298-306.
Abstract Five ferrite/bainite (F/B) dual-phase steels with the chemistry of low carbon, high manganese and high niobium, and different volume fractions of bainite (15%-98%) were produced by control rolling+relaxing+ACC processing. With the help of the modified Crussard-Jaoul (C-J) analysis, the effects of soft phase (ferrite) content and its grain size on the work--hardening behavior of the steels and the cooperative deformation relationship between softer phase and harder phase were studied, which was validated by EBSD analysis. The results illustrate that a reasonable proportion of F/B can be helpful to improve initial work-hardening (a high Rt1.5/Rt0.5), reduce the yield ratio, and maintain a high uniform elongation. It is known that the cooperative deformation of ferrite and bainite is the main mechanism for improving the stress ratio and the uniform elongation of the F/B dual-phase steels.
Received: 09 October 2011
Fund:
Supported by National Basic Research Program of China (No.2010CB630801)
[1] Li H L, Li X, Ji L K. Weld Pipe Tube, 2007; 30(5):6
(李鹤林, 李霄, 吉玲康. 焊管, 2007; 30(5): 6)
[2] Shang C J, Yang S W, Wang X M, He X L. J Univ Sci Technol Beijing, 2003; 25: 288
(尚成嘉, 杨善武, 王学敏, 贺信莱. 北京科技大学学报, 2003; 25: 288)
[3] Llewellyn D T, Hillis D J. Ironmak Steelmak, 1996; 23(6): 66
[4] Saleh M H, Priestner R. J Mater Process Technol, 2001; 113: 587
[5] Bayram A, Uguz A, UlaM. Mater Charact, 1999; 43: 259
[6] Colla V, Sanctis M D, Dimatteo A, Lovicu G, Solina A, Valentini R. Metall Mater Trans, 2009; 40A: 2557
[7] Fujibayashi A, Omata K. JFE Technol Rev, 2005; 5: 11
[8] Shinmiya T, Ishikawa N, Okatsu M, Endo S, Shikanai N, Kondo J. Proc 16th Int Offshore and Polar Engineering Conference, Lisbon, Portugal: International Society of Offshore and Polar Engineers (ISOPE), 2007: 2963
[9] Jiao D T, Cai Q W, Wu H B. Acta Metall Sin, 2009; 45: 1111
(焦多田, 蔡庆武, 武会宾. 金属学报, 2009; 45: 1111)
[10] Watanabe Y, Ishibashi K, Yoshii K. Nippon Steel Tech Rep, 2004; 90: 53
[11] Homma K, Tanaka M, Matsuoka K, Kasuya T, Kawasaki H. Nippon Steel Tech Rep, 2008; 97: 51
[12] Jiang Z, Guan Z, Lian J. J Mater Sci, 1993; 28: 1814
[13] Son Y I, Lee Y K, Park K T, Lee C S, Shin D H. Acta Mater, 2005; 53: 3125
[14] Podder A S, Bhattacharjee D, Ray R K. ISIJ Int, 2007; 47: 1058
[15] Umemoto M, Liu Z G, Sugimoto S, Tsuchiya K. Metall Mater Trans, 2000; 32A: 1785
[16] Kumar A, Singh S B, Ray K K. Mater Sci Eng, 2008; A474: 270
[17] Bag A, Ray K K, Dwarkadasa E S. Metall Trans, 1999; 30A: 1193
[18] Ishikawa N, Parks D M, Socrate S, Kurihara M. ISIJ Int, 2000; 40: 1170
[19] Huper T, Endo S, Ishikawa O, Osawa K. ISIJ Int, 1999; 39: 288
[20] Shikana N, Kagawa H, Kuriha M. ISIJ Int, 1992; 32: 337
[21] Chang P H, Preban A G. Acta Metall, 1985; 33: 897
[22] DeArdo A J. ISIJ Int, 1995; 35: 946
[23] Sch¨oberl T, Gupta H S, Fratzl P. Mater Sci Eng, 2003; A363: 211
[24] Yu Q B, Zhao X P, Sun B. Iron Steel, 2007; 42: 76
(于庆波, 赵贤平, 孙 斌. 钢铁, 2007; 42: 76)
[25] Jiang Z H, Guan Z Z, Lian J S. Mater Sci Eng, 1995; A190: 55
