In situ observations of austenite grain growth in Fe-C-Mn-Si super bainitic steel
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第11期
论文作者：Feng Liu Guang Xu Yu-long Zhang Hai-jiang Hu Lin-xin Zhou Zheng-liang Xue
文章页码：1060 - 1066
摘 要：In situ observations of austenite grain growth in Fe-C-Mn-Si super bainitic steel were conducted on a hightemperature 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 efect of heating rate on austenite grain growth was investigated,and the relation between austenite grains and bainite morphology after bainitic transformations was also discussed.
Feng Liu1，Guang Xu1，Yu-long Zhang2，Hai-jiang Hu1，Lin-xin Zhou3,4，Zheng-liang Xue1
1. The Key Laboratory of the Ministry of Education of China for Ferrous Metallurgy and Resources Utilization,Wuhan University of Science and Technology2. State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group)3. Daye Special Steel Co. Ltd.4. Hubei Xinyegang Steel Co. Ltd.
摘 要：In situ observations of austenite grain growth in Fe-C-Mn-Si super bainitic steel were conducted on a hightemperature 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 efect 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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