1. Beijing National Center for Electron Microscopy, Laboratory of Advanced Materials MOE, The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 3. Central Iron and Steel Research Institute, Beijing 100081, China
Mn Diffusion at Early Stage of Intercritical Annealing of 5Mn Steel
1. Beijing National Center for Electron Microscopy, Laboratory of Advanced Materials MOE, The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 3. Central Iron and Steel Research Institute, Beijing 100081, China
ժҪ Mn distribution and austenite morphology at the early stage of intercritical annealing of 5Mn steel were investigated. It was experimentally demonstrated that a newly formed 20 nm-thick austenite was formed without the partitioning of Mn. The elemental analysis confirmed that the growth of austenite should be controlled by the diffusion of C prior to the diffusion of Mn at a low heating rate. The austenite growth started under negligible-partitioning local equilibrium mode and then switched to partitioning local equilibrium mode. Mn segregation at the ��/�� interface suggested that the collector plate mechanism was the essential way of Mn partitioning at the early stage of austenite growth.
Abstract��Mn distribution and austenite morphology at the early stage of intercritical annealing of 5Mn steel were investigated. It was experimentally demonstrated that a newly formed 20 nm-thick austenite was formed without the partitioning of Mn. The elemental analysis confirmed that the growth of austenite should be controlled by the diffusion of C prior to the diffusion of Mn at a low heating rate. The austenite growth started under negligible-partitioning local equilibrium mode and then switched to partitioning local equilibrium mode. Mn segregation at the ��/�� interface suggested that the collector plate mechanism was the essential way of Mn partitioning at the early stage of austenite growth.
Xi-nan LUO, Xiao-yan ZHONG, Hai-wen LUO, Hui-hua ZHOU, Cun-yu WANG, Jie SHI. Mn Diffusion at Early Stage of Intercritical Annealing of 5Mn Steel[J]. �й������ڿ���, 2015, 22(11): 1015-1019.
Xi-nan LUO, Xiao-yan ZHONG, Hai-wen LUO, Hui-hua ZHOU, Cun-yu WANG, Jie SHI. Mn Diffusion at Early Stage of Intercritical Annealing of 5Mn Steel. Chinese Journal of Iron and Steel, 2015, 22(11): 1015-1019.
2015, Vol. 22 
