Investigation of mold metallurgical behavior under #br# electromagnetic stirring for round bloom
WANG Pu1,LI Shaoxiang1,CHEN Lie2,CHEN Xiqing1,WANG Xiaosong1,ZHANG Jiaquan1
(1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,
Beijing 100083, China;2. Jianlong Beiman Special Steel Co., Ltd., Qiqihar 161041, Heilongjiang, China)
Abstract: In order to explore the effect of mold electromagnetic stirring(MEMS) on the overall metallurgical behavior in the round bloom. Based on a round bloom special steel casting process,a coupled threedimensional numerical model was developed to describe the influence of electromagnetic stirring on the overall mold metallurgical behavior. The reliability of the model was verified by experimental results,the electromagnetic field,fluid flow,heat transfer and solidification in mold under the fivehole nozzle casting conditions for round bloom casting were revealed. The comprehensive influence of electromagnetic stirring on the metallurgical behavior in mold was proposed based on a multiparameter evaluation. According to the study results,when the current intensity is 280 A for a middle carbon alloy steel casting,the meniscus can maintain a certain tangential velocity and superheat,which is beneficial to melting of mold powder and the floating removal of inclusions. Additionally,the mold fluctuation has been kept under control to avoid slag entrapment,and the superheat of melt steel is well dissipated through a moderate horizontal swirling flow induced by MEMS to enhance the formation of equiaxed crystals. A much weak impingement of the outlet flow on the shell has been observed as well,which can be expected to eliminate the popular subsurface white band phenomenon with an even shell thickness in the mold region.
王璞,李少翔,陈列,陈希青,王小松,张家泉. 电磁搅拌对大圆坯结晶器冶金行为影响的探讨[J]. 钢铁, 2019, 54(8): 82-89.
WANG Pu,LI Shaoxiang,CHEN Lie,CHEN Xiqing,. Investigation of mold metallurgical behavior under #br# electromagnetic stirring for round bloom. Iron and Steel, 2019, 54(8): 82-89.