Original position statistic distribution analysis for continuous casting round billet of 12Mn steel
WANG Xu1, WEI Jun1, QIU Sheng-tao*1, LI Zhao-ling2, LI Wei2
1. National Engineering Research Center of Continuous Casting Technology, Iron and Steel Research Institute Group, Beijing 100081, China; 2. Tianjin Iron and Steel Group Co., Ltd., Tianjin 300301, China
Abstract：In order to obtain the elemental segregation, porosity and inclusion distribution in cross section of continuous casting round billet, the original position statistic distribution analysis of continuous casting round billet of 12Mn seamless steel tube was conducted by original position analyzer for metal. According to the two-dimensional composition distribution map and line distribution map of C, Si, Mn and P, the enrichment of C could be obviously observed in the centre. On the contrary, the content of Si, Mn and P was extremely low. Winthin the whole cross section, the content of elements such as C, Si, and P, especially for C, showed obviously segregation, while Al was characterized by scattered island-like enrichment due to the formation of inclusions. Meanwhile, the content of S had no significant change, and the distribution of Si and Mn was very similar. In addition, the content frequency map of each element and particle size distribution map of Al were obtained by quantitative analysis and particle size analysis of inclusions. The apparent density distribution map showed that the overall apparent density of cross section of round billet was low to 95.60%, which was caused by the center shrinkage hole of casting billet.
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WANG Xu, WEI Jun, QIU Sheng-tao, LI Zhao-ling, LI Wei. Original position statistic distribution analysis for continuous casting round billet of 12Mn steel. , 2019, 39(3): 1-6.
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