Abstract
The effect of deformation in the non-recrystallization region on the phase transformation for a low-carbon and high Nb-containing steel with coarse austenite grain size was investigated by means of dilatometric measurement and microstructure observation. The results show that with increasing the cooling rate, both the transformation start and finish temperatures measured by dilatometer are decreased, and the corresponding microstructure is transformed from ferrite and pearlite to full granular bainite gradually. The dynamic continuous cooling transformation diagram was plotted according to the dilatometric measurements and microstructure observations. Dilatometric measurements also show that the transformation start and finish temperatures of the test steel rise with increasing strain, strain rate and deformation temperature, and the reasons are discussed.
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References
Cuddy L J. The Effect of Microalloy Concentration on the Recrystallization of Austenite During Hot Deformation. Plastic Deformation of Metals [M]. New York: Academic Press, 1975.
YIN Shu-biao, LIU Qing-you, ZHANG Shu-Ian, et al. Influence of Hot Deformation Parameters on Microstructural Evolution of 0. 05C0. 128Nb Steel [J]. Heat Treatment of Metals, 2007, 32(11): 23 (in Chinese).
ZHANG Ling, XUE Chun-xia, YANG Wang-yue, et al. Quantitative Investigation of Deformation Induced Precipitation in Coarse Grained Austenite HTP Steel [J]. Acta Metallurgica Sinica, 2007, 43(8): 791 (in Chinese).
Kaspar R. Microstructural Aspects and Optimization of Thin Slab Direct Rolling of Steels [J]. Steel Research International, 2003, 74(5): 318.
Kaspar R, Fliiss P. Laboratory Simulation of the Direct Rolling of Steel [J]. Steel Research, 1991, 62(11): 501.
Irvine K J, Pickering F B, Gladman T, et al. Grain-Refined CMn Steels [J]. Journal of the Iron and Steel Institute, 1967, 205(2): 161.
Yamamoto Sadahiro, Yokoyama Hiroyasu, Yamada Katsumi, et al. Effects of the Austenite Grain Size and Deformation in the Unrecrystallization Region on Bainite Transformation Behavior and Microstructure [J]. ISIJ International, 1995, 35(8): 1020.
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Foundation Item: Item Sponsored by Applied Basic Researches Foundation of Yunnan Province of China (2009ZC004X) ; Educational Commission of Yunnan Province of China (09Y0051)
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Yin, Sb., Sun, Xj., Liu, Qy. et al. Influence of deformation on transformation of low-carbon and high Nb-containing steel during continuous cooling. J. Iron Steel Res. Int. 17, 43–47 (2010). https://doi.org/10.1016/S1006-706X(10)60057-X
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DOI: https://doi.org/10.1016/S1006-706X(10)60057-X