In situ observations of austenite grain growth in Fe-C-Mn-Si super bainitic steel

Feng Liu; Guang Xu; Yu-long Zhang; Hai-jiang Hu; Lin-xin Zhou; Zheng-liang Xue

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In situ observations of austenite grain growth in Fe-C-Mn-Si super bainitic steel

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In situ observations of austenite grain growth in Fe-C-Mn-Si super bainitic steel were conducted on a high-temperature laser scanning confocal microscope during continuous heating and subsequent isothermal holding at 850, 1000, and 1100◦C for 30 min. A grain growth model was proposed based on experimental results. It is indicated that the austenite grain size increases with austenitizing temperature and holding time. When the austenitizing temperature is above 1100◦C, the austenite grains grow rapidly, and abnormal austenite grains occur. In addition, the eff ect of heating rate on austenite grain growth was investigated, and the relation between austenite grains and bainite morphology after bainitic transformations was also discussed.

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《矿物冶金与材料学报》|2013年第11期|1060-1066|共7页
作者
Feng Liu; Guang Xu; Yu-long Zhang; Hai-jiang Hu; Lin-xin Zhou; Zheng-liang Xue;
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作者单位

The Key Laboratory of the Ministry of Education of China for Ferrous Metallurgy and Resources Utilization, Wuhan University of Science and Technology, Wuhan 430081, China;

The Key Laboratory of the Ministry of Education of China for Ferrous Metallurgy and Resources Utilization, Wuhan University of Science and Technology, Wuhan 430081, China;

State Key Laboratory of Development and Application Technology of Automotive Steels Baosteel Group, Shanghai 201900, China;

The Key Laboratory of the Ministry of Education of China for Ferrous Metallurgy and Resources Utilization, Wuhan University of Science and Technology, Wuhan 430081, China;

Daye Special Steel Co. Ltd., Hubei Xinyegang Steel Co. Ltd., Huangshi 435001, China;

The Key Laboratory of the Ministry of Education of China for Ferrous Metallurgy and Resources Utilization, Wuhan University of Science and Technology, Wuhan 430081, China;

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In situ observations of austenite grain growth in Fe-C-Mn-Si super bainitic steel

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