ժҪ By optical microscopy, transmission electron microscopy and energy dispersive spectroscopy, the changes with aging time in size, composition and distribution of nanometer-sized (Ti,Mo)C precipitated in Ti-Mo low-alloy ferritc steel have been studied in comparison with that of nanometer-sized TiC precipitated in Ti low-alloy ferritc steel. It was found that the growth rate of (Ti,Mo)C in Ti-Mo steel was less than that of TiC in Ti steel. Nanometer-sized carbides formed at 650 �� (or 550 ��) for 55 h were at transitional stage from growth to coarsening. When aging time reaches 55 h, the coarsening rates of nanometer-sized carbides in Ti and Ti-Mo steel tend to be the same and invariable. The influence of Mo on growth and coarsening of nanometer-sized carbides tends to decrease with increasing aging time, and Mo contents in nanometer-sized carbides with the same size at different aging time were different.
Abstract��By optical microscopy, transmission electron microscopy and energy dispersive spectroscopy, the changes with aging time in size, composition and distribution of nanometer-sized (Ti,Mo)C precipitated in Ti-Mo low-alloy ferritc steel have been studied in comparison with that of nanometer-sized TiC precipitated in Ti low-alloy ferritc steel. It was found that the growth rate of (Ti,Mo)C in Ti-Mo steel was less than that of TiC in Ti steel. Nanometer-sized carbides formed at 650 �� (or 550 ��) for 55 h were at transitional stage from growth to coarsening. When aging time reaches 55 h, the coarsening rates of nanometer-sized carbides in Ti and Ti-Mo steel tend to be the same and invariable. The influence of Mo on growth and coarsening of nanometer-sized carbides tends to decrease with increasing aging time, and Mo contents in nanometer-sized carbides with the same size at different aging time were different.
��������:National Key Basic Research and Development Program of China
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E-mail: hbh_ice@163.com
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Bin-hao HU,Qing-wu CAI,Hui-bin WU. Influence of Mo on Growth and Coarsening of Nanometer-sized Carbides in Low-alloy Ferritic Steels Containing Ti[J]. �й������ڿ���, 2014, 21(9): 878-885.
Bin-hao HU,Qing-wu CAI,Hui-bin WU. Influence of Mo on Growth and Coarsening of Nanometer-sized Carbides in Low-alloy Ferritic Steels Containing Ti. Chinese Journal of Iron and Steel, 2014, 21(9): 878-885.
2014, Vol. 21 
