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

《钢铁研究学报:英文版》2020年 第7期 | 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 Institute Beijing 100081 China Benxi Iron&Steel Group Co. Ltd. Benxi 117021 Liaoning China State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

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摘 要:Solidification behavior in the mold region plays an important role in production efficiency and steel quality.To 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 steel.The law of shell thickness evolution along mold height and circumference was analyzed.The 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,respectively.Initial solidification point along casting direction appears at approximately 35 mm below the meniscus.Overall,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,respectively.The 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 growth.Out 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.
【分 类】 【工业技术】 > 金属学与金属工艺 > 金属学与热处理
【关键词】 Continuous casting MOLD Hypo-peritectic steel Solidified shell Sulfur print
【出 处】 《钢铁研究学报:英文版》2020年 第7期 782-787页 共6页
【收 录】 中文科技期刊数据库