Analysis and discussion on formation mechanism of white band in CC billet
LI Hong-guang1，JI Cheng2，CHEN Liang1，CHEN Tian-ming1，YANG Wen-zhong3，WU Guo-rong1
（1. State Key Laboratory of Vanadium and Titanium Resource Comprehensive Utilization， Pangang Group Research Institute Co.， Ltd.， Panzhihua 617000， Sichuan， China 2. School of Meatllurgy， Northeastern University， Shenyang 110819， Liaoning， China 3. Panzhihua Steel and Vanadium Co.， Ltd.， Pangang Group， Panzhihua 617000， Sichuan， China）
Abstract：Experiments with different continuous casting processes were carried out to clarify the principle of the white band formation in the billets. The influences of F-EMS and final stage of solidification reduction on the formation of white band during CC were analyzed. Then according to the experimental results，the white bands in the billets were characterized and the mechanisms for their formation during CC were proposed in view of technical operation conditions. The white bands were found dense conglomerate dendrite-structure，whose definite structure type depends on the position of EMS. During solidification，the force field on the billets causes compactness in the area of white band，resulting in denser structure than other areas around. These dense dendritic areas with a low concentration of solutes appear white after pickling，forming the white band in billets.
收稿日期: 2017-02-15
出版日期: 2017-07-28
引用本文:
李红光，祭 程，陈 亮，陈天明，杨文中，吴国荣. 连铸坯白亮带形成机理分析探讨[J]. 钢铁, 2017, 52(8): 55-59.
LI Hong-guang，JI Cheng，CHEN Liang，CHEN Tian-ming，YANG Wen-zhong，WU Guo-rong. Analysis and discussion on formation mechanism of white band in CC billet. Iron and Steel, 2017, 52(8): 55-59.
刘永铨．钢的热处理[M]．北京：冶金工业出版社，1981．Liu Yongquan. Heat Treatment of Steel[M]. Bei Jing: Metallurgical Industry Press, 1981.
[1]
刘永铨．钢的热处理[M]．北京：冶金工业出版社，1981．Liu Yongquan. Heat Treatment of Steel[M]. Bei Jing: Metallurgical Industry Press, 1981.
[2]
陈得和．钢的缺陷[M]．北京：机械工业出版社，1977．Chen Dehe. Defects of Steel[M]. Bei Jing: China Machine Press, 1977.
[2]
陈得和．钢的缺陷[M]．北京：机械工业出版社，1977．Chen Dehe. Defects of Steel[M]. Bei Jing: China Machine Press, 1977.
[3]
张广军，张旭东，张劲峰，刘兴洪．连铸工艺对铸坯碳偏析的影响[J]．连铸，2010，(03)：43-46．Zhang Guangjun, Zhang Xudong, Zhang Jingfeng, Liu Xinghong. Effects of continuous casting process on C segregation ofbillets[J]. Continuous Casting, 2010, （03）: 43-46.
[3]
张广军，张旭东，张劲峰，刘兴洪．连铸工艺对铸坯碳偏析的影响[J]．连铸，2010，(03)：43-46．Zhang Guangjun, Zhang Xudong, Zhang Jingfeng, Liu Xinghong. Effects of continuous casting process on C segregation ofbillets[J]. Continuous Casting, 2010, （03）: 43-46.
[4]
蒋丽红，田乃媛．弹簧钢连铸坯中心偏析的研究[J]．钢铁，2010，(01)：43-45．Jiang Lihong, Tian Naiyuan. Research on centre segregation of billets for spring steels[J]. Iron and Steel, 2010,（01）: 43-45.
[4]
蒋丽红，田乃媛．弹簧钢连铸坯中心偏析的研究[J]．钢铁，2010，(01)：43-45．Jiang Lihong, Tian Naiyuan. Research on centre segregation of billets for spring steels[J]. Iron and Steel, 2010,（01）: 43-45.
[5]
张开钧，王新华，刘洋，李秀刚，张炯明．轻压下对管线钢连铸坯中心偏析影响的研究[J]．炼钢，2009，(01)：51-54+65．Zhang Kaijun, Wan Xinhua, Liu Yang. Etc,. Research on the effects of soft reduction on the centre segregation of pipeline steelbillets[J]. Steel Making, 2009,(01):51-54+65.
[5]
张开钧，王新华，刘洋，李秀刚，张炯明．轻压下对管线钢连铸坯中心偏析影响的研究[J]．炼钢，2009，(01)：51-54+65．Zhang Kaijun, Wan Xinhua, Liu Yang. Etc,. Research on the effects of soft reduction on the centre segregation of pipeline steelbillets[J]. Steel Making, 2009,(01):51-54+65.
[6]
黄贞益，陈光，牛亚然，王光朋，黄一新，刘文学．连铸坯凝固偏析和高强热轧盘条的组织遗传性[J]．钢铁研究学报，2007，(01)：44-47．Huang Zhenying, Chen Guang, Niu Yaran, Etc., Structure hereditary between solidification segregation of continuous casting billetsand high strength green rod[J]. Journal of Iron and Steel Research, 2007,(01):44-47.
[6]
黄贞益，陈光，牛亚然，王光朋，黄一新，刘文学．连铸坯凝固偏析和高强热轧盘条的组织遗传性[J]．钢铁研究学报，2007，(01)：44-47．Huang Zhenying, Chen Guang, Niu Yaran, Etc., Structure hereditary between solidification segregation of continuous casting billetsand high strength green rod[J]. Journal of Iron and Steel Research, 2007,(01):44-47.
[7]
高桥等：钢铁[J] 61， 1975， P21~98．Gao Qiao. Etc., Iron and Steel[J] 61, 1975, P21~98.
[7]
高桥等：钢铁[J] 61， 1975， P21~98．Gao Qiao. Etc., Iron and Steel[J] 61, 1975, P21~98.
[8]
R.Alberny et al: AIME Elect. Furnace Proce. 1973 P231
[8]
R.Alberny et al: AIME Elect. Furnace Proce. 1973 P231
[9]
M.R.Bridge et al: Metall Trans. 1984 Vol15 BP581
[9]
M.R.Bridge et al: Metall Trans. 1984 Vol15 BP581
[10]
李平．电磁搅拌连铸坯白亮带组织分层形态结构的形成机理[A]．2012中国功能新材料学术论坛暨第三届全国电磁材料及器件学术会议论文摘要集[C]．中国金属学会材料科学分会；2012：1．Li Ping. Formation mechanism of organizational hierarchy morphological structure of white band in EMS continuous castingbillets[A]. 2012 Conference collected works of 3th national electromagnetic material and device academic conference[C]. Chinese societyof metallic materials: 2012: 1.
[10]
李平．电磁搅拌连铸坯白亮带组织分层形态结构的形成机理[A]．2012中国功能新材料学术论坛暨第三届全国电磁材料及器件学术会议论文摘要集[C]．中国金属学会材料科学分会；2012：1．Li Ping. Formation mechanism of organizational hierarchy morphological structure of white band in EMS continuous castingbillets[A]. 2012 Conference collected works of 3th national electromagnetic material and device academic conference[C]. Chinese societyof metallic materials: 2012: 1.
[11]
李平．电磁搅拌连铸坯凝固组织白亮带成因结构分析[A]．第八届（2011）中国钢铁年会论文集[C]．中国金属学会；2011：6．Li Ping. Structure analysis on the factors of white band in EMS continuous casting billets[A]. conference collected works of 8th （2011）China iron and steel annual meeting[C]. Chinese society of metallic materials: 2011:6.
[11]
李平．电磁搅拌连铸坯凝固组织白亮带成因结构分析[A]．第八届（2011）中国钢铁年会论文集[C]．中国金属学会；2011：6．Li Ping. Structure analysis on the factors of white band in EMS continuous casting billets[A]. conference collected works of 8th （2011）China iron and steel annual meeting[C]. Chinese society of metallic materials: 2011:6.
2017, Vol. 52 
