重压下工艺下大断面方坯内部质量改善研究

doi:10.13228/j.boyuan.issn1005-4006.20190096

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摘要以宝武集团广东韶关钢铁有限公司大断面方坯（断面尺寸为320 mm×425 mm）生产线为研究对象,对基于凸辊的重压下技术冶金性能进行了深入系统分析。结果表明,实施重压下工艺后,铸坯中心疏松、缩孔及成分均匀性均得到了明显的改善;其中,纵低倍上中心偏析区域宽度由52降至39 mm, 碳元素偏析指数值在铸坯内部最大值由1.174降至1.100,极差值由0.230降至0.174。相应地,直径为90 mm的圆钢轧材产品疏松区域宽度由50降至42 mm,其中心疏松评级比无压下降低了0.5级。

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	刘成斌
	韦乾永
	曾令宇
	程晓文

关键词 ：重压下技术, 大断面方坯, 中心疏松, 宏观偏析

Abstract：The metallurgical performances were systematically investigated the heavy reduction technology with the convex rollers for bloom continuous casting process with cross section of 320 mm×425 mm in Baowu Group Guangdong Shaoguan Iron and Steel Co., Ltd. China. It is shown that the strand internal quality including central prosity, shrinkage cavity and composition uniformity has been improved significantly after using the heavy reduction technology. Among these, the width of center segregation region in the strand longitudinal section reduced from 52 mm to 39 mm, the maximum value of carbon segregation in the strand decreased from 1.174 to 1.100. Accordingly, the width of porosity region decreased from 50 mm to 42 mm, and the porosity grade can be reduced by 0.5 for the rolling production with diameter of 90 mm.

Key words： heavy reduction technology bloom casting central porosity macro-segregation

收稿日期: 2019-11-15

引用本文:

刘成斌, 韦乾永, 曾令宇, 程晓文. 重压下工艺下大断面方坯内部质量改善研究[J]. 连铸, 2020, 39(1): 66-70. Liu Cheng-bin, Wei Qian-yong, Zeng Ling-yu, Cheng Xiao-wen. Research on improvement of internal quality of large section billet under heavy pressing process. CONTINUOUS CASTING, 2020, 39(1): 66-70.

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[1]	KAyata, H Mori, K Taniguchi,et al. Low superheat teeming with electromagnetic stirring[J]. ISIJ Int, 1995, 35(6):680.
[2]	肖红, 易兵, 龙萌, 等. 连铸结晶器电磁搅拌技术的新发展[J]. 连铸, 2017, 42(4):1.
[3]	孙海波, 李烈军, 程晓文, 等. 大方坯末端电磁搅拌工艺参数优化与设计[J]. 炼钢, 2015, 31(4):42.
[4]	张冰成, 金美余, 李志刚,等. 连铸生产高碳钢方坯轻压下技术应用参数的选取[J]. 特种铸造及有色合金, 2014, 34(1):32.
[5]	VLudlow, A Normanton, A Anderson,et al. Strategy to minimise central segregation in high carbon steel grades during billet casting[J]. Ironmaking & Steelmaking, 2005, 32(1): 68.
[6]	朱苗勇. 连铸大方坯凝固末端重压下技术及其应用[C]//第六届宝钢学术年会论文集.上海:中国金属学会,2015:1596.
[7]	J I Cheng, WU Chen-hui, ZHU Miao-yong, Thermo-mechanical behavior of the continuous casting bloom in the heavy reduction process[J]. JOM, 2016, 68(12): 3107.
[8]	J I Cheng, WANG Zi-lin, WU Chen-hui, et al, Constitutive modeling of the flow stress of GCr15 continuous casting bloom in the heavy reduction process[J]. Metallurgical and Materials Transactions:B, 2018, 49(2): 767.
[9]	GUAN Rui, JI Cheng, ZHU Miaoyong, et al, Numerical simulation of V-shaped segregation in continuous casting blooms based on a microsegregation model[J]. Metallurgical and Materials Transactions:B, 2018, 49(5): 2571.
[10]	J I Cheng, L I Guoliang, WU Chenhui, et al, Design and application of CSC-Roll for heavy reduction of the bloom continuous casting process[J]. Metallurgical and Materials Transactions:B, 2019, 50(1), 110.
[11]	祭程, 关锐, 朱苗勇, 等,重载铁路钢轨钢连铸重压下工艺研发及应用[J]. 钢铁研究学报(中文版), 2019,31(2): 125.
[12]	WU Chen-hui, JI Cheng, ZHU Miao-yong, Influence of differential roll rotation speed on evolution of internal porosity in continuouscasting bloom during heavy reduction, Journal of Material Processing Technology, 2019, 271: 651.