FC结晶器作用下低碳铝镇静钢铸坯表层夹杂物分布
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- 英文论文题名：DISTRIBUTION OF SURFACE INCLUSIONS IN CONTINOUS CASTING LCAK STEEL SLABS WITH FC MOLD
- 论文作者：邓小旋 ; 季晨曦 ; 苑鹏 ; 王胜东 ; 梅宁 ; 王强强 ; 李林平
- 英文论文作者：DENG Xiaoxuan ; JI Chenxi ; YUAN Peng ; WANG Shengdong ; MEI Ning ; WANG Qiangqiang ; LI Linping ; Shougang Research Institute of Technology ; Shougang Group ; Shougang Jingtang United Iron & Steel Co. ; Ltd ; School of Metallurgical &Ecological Engineering ; University of Science & Technology Beijing
- 年：2016
- 作者机构：首钢技术研究院薄板所;首钢京唐钢铁联合有限责任公司;北京科技大学冶金与生态工程学院;
- 论文关键词：大型夹杂物 ; 连铸 ; 枝晶 ; 凝固前沿 ; FC结晶器
- 英文论文关键词：macro inclusions ; continuous casting ; dendrite ; solidification front ; FC mold
- 会议召开时间：2016-08-15
- 会议录名称：第三届全国电磁冶金与强磁场材料科学会议学术论文集
- 语种：中文
- 分类号：TF777
- 学会代码：ZGJS
- 会议名称：第三届全国电磁冶金与强磁场材料科学会议
- 会议地点：中国河南焦作
- 主办单位：中国金属学会电磁冶金与强磁场材料科学分会
- 学会名称：中国金属学会
- 页数：7
- 文件大小：2562k
- 原文格式：O
- 会议级别：全国
摘要
本文采用ASPEX扫描电镜逐层分析了不同拉速下低碳铝镇静钢中大尺寸夹杂物特征,得到铸坯宽度和厚度表层大于50微米的分布规律。同时利用苦味酸溶液侵蚀铸坯表层枝晶形貌。研究发现:铸坯表层大于50微米的夹杂物主要是簇群状氧化铝和气泡+簇群状氧化铝。宽度方向上由于水口附近流速小,钩状坯壳较深,夹杂物主要集中在板坯中部。板坯厚度方向夹杂物主要集中在距表层3~5mm范围,对应于枝晶偏转角小的区域。本文结合结晶器流场和冲刷效应解释了铸坯表层10mm内大型夹杂物的分布,认为高拉速连铸可提高凝固前沿的冲刷速度,减少大型夹杂物数量。
Macro inclusions on the surface layer of low carbon aluminum killed(LC AK) steel slabs which cast at different casting speeds were characterized with step-machining methods within 10 mm from the slab surface.The macro-inclusions larger than 50 microns along the width and thickness of slabs were evaluated by ASPEX automatic inclusion analyzer.In addition,solidification dendrites on the cross-section of slabs were also etched to elucidate the distribution mechanism of inclusions.The results show that cluster alumina and bubble associated alumina are the dominant macro-inclusions on the surface layers.Along the slab width direction,macro-inclusions were mostly found at the slab center because of the local deeper hook and freezing meniscus surrounding the SEN.While in terms of slab thickness,inclusions mainly concentrated on the 3~5mm from the top of slab surface,where the corresponding columnar dendrites show a relative small declination angle,indicating slow local flow velocity during solidification.The distribution mechanisms of macro inclusions within the 10 mm from the slab surface are illustrated combined with the fluid flow and the washing effect and high speed casting promote this effect
Macro inclusions on the surface layer of low carbon aluminum killed(LC AK) steel slabs which cast at different casting speeds were characterized with step-machining methods within 10 mm from the slab surface.The macro-inclusions larger than 50 microns along the width and thickness of slabs were evaluated by ASPEX automatic inclusion analyzer.In addition,solidification dendrites on the cross-section of slabs were also etched to elucidate the distribution mechanism of inclusions.The results show that cluster alumina and bubble associated alumina are the dominant macro-inclusions on the surface layers.Along the slab width direction,macro-inclusions were mostly found at the slab center because of the local deeper hook and freezing meniscus surrounding the SEN.While in terms of slab thickness,inclusions mainly concentrated on the 3~5mm from the top of slab surface,where the corresponding columnar dendrites show a relative small declination angle,indicating slow local flow velocity during solidification.The distribution mechanisms of macro inclusions within the 10 mm from the slab surface are illustrated combined with the fluid flow and the washing effect and high speed casting promote this effect
引文
[1]Kumar A,Choudhary S K,Ajmani S K ISIJ Int,2012;52(12):2305
[2]Shangguan D,Ahuja S,Stefanescu D.Metall Mater Trans A,1992;23(2):669
[3]Stefanescu D M,Juretzko F R,CatalinaA,et al.Metall Mater Trans A,1998;29(6):1697
[4]Juretzko F,Stefanescu D,Dhindaw B,et al.Metall Mater Trans A,1998;29(6):1691
[5]Huang F-x,Wang X-h,Zhang J-m,et al.Journal of Iron and Steel Research,International,2008;15(6):78
[6]Miyake T,Morishita M,Nakata H,et al.ISIJ Int,2006;46(12):1817
[7]Lee S-M,Kim S-J,Kang Y-B,et al.ISIJ Int,2012;52(10):1730
[8]Toh T,Takeuchi E,Hojo M,et al.ISIJ Int,1997;37(11):1112
[9]Miki Y,Ohno H,Kishimoto Y,et al.Tetsu-To-Hagane,2011;97(8):423
[10]Zhang Q,Wang L,Wang X.ISIJ Int,2006;46(10):1421
[11]Wang M,Bao YP,Cui H,et al.Ironmaking Steelmaking,2011;38(5):386
[12]Marukawa K The Challenge of Braking the Limit of the Steel Refining on the Mass Production//,1996
[13]Sahai Y Emi T.Tundish Technology for Clean Steel Production Singapore:World Scientific,2008
[14]Tsai H T,Sammon W J,Hazelton D E.Characterization and Countermeasures for Sliver Defects in Cold Rolled Products//Steelmaking Conference Detroit,Michigan;USA;,1990:49
[15]Deng X,Zhu G,Ji C,et al.Distribution Mechanisms of Surface Inclusions in High Speed Cast Deep-Drawing Steel Slabs//Beijing,China,2015:829
[16]Deng X-x,Li L-p,Wang X-h,et al.Int.J.Miner.Metall.Mater,2014;21(6):531
[17]Okano S,Nishimura T,Ooi H,et al.Tetsu-To-Hagane,1975;61(14):2982
[18]Wang S,Zhang L,Wang Q,et al.Metallurgical Research&Technology,2016;113(205):1
[2]Shangguan D,Ahuja S,Stefanescu D.Metall Mater Trans A,1992;23(2):669
[3]Stefanescu D M,Juretzko F R,CatalinaA,et al.Metall Mater Trans A,1998;29(6):1697
[4]Juretzko F,Stefanescu D,Dhindaw B,et al.Metall Mater Trans A,1998;29(6):1691
[5]Huang F-x,Wang X-h,Zhang J-m,et al.Journal of Iron and Steel Research,International,2008;15(6):78
[6]Miyake T,Morishita M,Nakata H,et al.ISIJ Int,2006;46(12):1817
[7]Lee S-M,Kim S-J,Kang Y-B,et al.ISIJ Int,2012;52(10):1730
[8]Toh T,Takeuchi E,Hojo M,et al.ISIJ Int,1997;37(11):1112
[9]Miki Y,Ohno H,Kishimoto Y,et al.Tetsu-To-Hagane,2011;97(8):423
[10]Zhang Q,Wang L,Wang X.ISIJ Int,2006;46(10):1421
[11]Wang M,Bao YP,Cui H,et al.Ironmaking Steelmaking,2011;38(5):386
[12]Marukawa K The Challenge of Braking the Limit of the Steel Refining on the Mass Production//,1996
[13]Sahai Y Emi T.Tundish Technology for Clean Steel Production Singapore:World Scientific,2008
[14]Tsai H T,Sammon W J,Hazelton D E.Characterization and Countermeasures for Sliver Defects in Cold Rolled Products//Steelmaking Conference Detroit,Michigan;USA;,1990:49
[15]Deng X,Zhu G,Ji C,et al.Distribution Mechanisms of Surface Inclusions in High Speed Cast Deep-Drawing Steel Slabs//Beijing,China,2015:829
[16]Deng X-x,Li L-p,Wang X-h,et al.Int.J.Miner.Metall.Mater,2014;21(6):531
[17]Okano S,Nishimura T,Ooi H,et al.Tetsu-To-Hagane,1975;61(14):2982
[18]Wang S,Zhang L,Wang Q,et al.Metallurgical Research&Technology,2016;113(205):1