Dynamic observation of bainite transformation in a Fe-C-Mn-Si superbainite steel |
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| Authors: | Haijiang Hu Guang Xu Yulong Zhang Zhengliang Xue Mingxing Zhou |
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| Affiliation: | 1.The State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels,Wuhan University of Science and Technology,Wuhan,China;2.State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group),Shanghai,China |
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| Abstract: | The dynamic observations of bainitic transformation in a Fe-C-Mn-Si superbainite steel were conducted on a high temperature laser scanning confocal microscope. It is indicated that the mutual intersection of bainite sheaves often occurs during growth of bainite ferrite, resulting in an interlocked bainite microstructure. Moreover, bainite transformation is promoted by higher austenization temperature and the longer and finer bainite platelets are obtained. Further, The average growth rate of bainite after austenization at 1 100 ° is calculated as 5.8 µm·s?1. In situ observation investigation makes it possible to identify bainite transformation in real time during isothermal holding. |
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