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Growth of solidified shell in bloom continuous casting mold of hypo-peritectic steel based on a FeS tracer method

Journal of Iron and Steel Research International 2020年第7期27卷 782-787页

作者： Da-peng Li Hua-zhang Wu Hai-feng Wang Hong Li State Key Laboratory of Advanced Steel Processing and Products Central Iron and Steel Research InstituteBeijing 100081China Benxi Iron&Steel Group Co. Ltd.Benxi 117021LiaoningChina State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

Solidification behavior in the mold region plays an important role in production efficiency and steel *** investigate shell growth within a mold,the sulfur prints of the entire shell thickness profile the meniscus to 100 mm below the mold were obtainedadding FeS tracer into molten steel during bloom continuous casting of hypo-peritectic *** law of shell thickness evolution along mold height and circumference was *** results show that there are three weak regions of solidification,which are in the mold upper part,in the mold lower part,and just below mold exit,possibly resulting periodic fluctuation of air gap between the shell and the mold,the impingement of melt jets on the solidification front,and the decreasing cooling intensity,*** solidification point along casting direction appears at approximately 35 mm below the ***,the solidified shell thickness in the inner side of the mold is a little larger than that in the outer side,and the former and the latter reach 25.5 and 24.3 mm at the mold exit,*** non-uniform shell growth in the inner side of the bloom is provided,while shell thicknesses in the narrow face and the outer side follow relatively regular *** of the mold,the thinnest shells on the transverse section exist in the regions of 60–90 mm and 40–70 mm the corners of the inner and outer sides,respectively,i.e.,the of-corners.

关键词： Continuous casting Mold Hypo-peritectic steel Solidified shell sulfur print

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