Ultra-fine-Grained Ferrite Prepared from Dynamic Reversal Austenite During Warm Deformation
来源期刊：Acta Metallurgica Sinica2020年第2期
论文作者：Hong-Bin Li Ming-Song Chen Ya-Qiang Tian Lian-Sheng Chen Li-Qing Chen
文章页码：290 - 298
摘 要：The ultra-fine-grained ferrite（UFGF） with the size of less than 1 μm is often difficult to be obtained for low-alloyed steel in practical production processing.In this study,considering the rod and wire production process,a new method for preparing the UFGF with submicron scale is proposed by warm deformation of six passes with total strain of 2.6,followed by the cooling process in Gleeble-3500 thermo-mechanical simulator.The results show that the UFGF with an average size of 0.64 μm could be obtained via the phase transformation from austenite grains with an average size of 3.4 μm,which are achieved by the deformation-induced reversal austenization during the high strain rate warm deformation.The main driving force for the reversal transformation is the stress.And the interval between the passes also plays an important role in the reversal austenization.
Hong-Bin Li1,2,3，Ming-Song Chen2，Ya-Qiang Tian1,3，Lian-Sheng Chen1,3，Li-Qing Chen4
1. College of Metallurgy and Energy,North China University of Science and Technology2. School of Mechanical and Electrical Engineering,Central South University3. Key Laboratory of the Ministry of Education for Modern Metallurgy Technology4. State Key Laboratory of Rolling and Automation,Northeastern University
摘 要：The ultra-fine-grained ferrite（UFGF） with the size of less than 1 μm is often difficult to be obtained for low-alloyed steel in practical production processing.In this study,considering the rod and wire production process,a new method for preparing the UFGF with submicron scale is proposed by warm deformation of six passes with total strain of 2.6,followed by the cooling process in Gleeble-3500 thermo-mechanical simulator.The results show that the UFGF with an average size of 0.64 μm could be obtained via the phase transformation from austenite grains with an average size of 3.4 μm,which are achieved by the deformation-induced reversal austenization during the high strain rate warm deformation.The main driving force for the reversal transformation is the stress.And the interval between the passes also plays an important role in the reversal austenization.
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