连铸坯倒角对粗轧宽展的影响及宽度模型改进
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摘要
带倒角的结晶器能够改善连铸板坯角部在矫直段的高温延展性,显著减少角横裂的发生。然而,连铸坯的倒角对粗轧过程宽展量有很大影响。通过建立粗轧过程板坯形变的有限元仿真模型,系统研究了轧制过程中板坯倒角尺寸和形状对轧件宽展量的影响。结果表明,连铸坯倒角边长越大,相同的立辊侧压量下所产生的狗骨回展量越小,同时在水平轧制时所产生的自然宽展也越小,而倒角角度的变化对粗轧宽展的影响不显著。针对现有的宽展公式没有考虑轧件存在倒角的问题,给出了一个含有倒角参数的修正项公式。通过与现场实测数据和原宽度模型计算结果对比,对于带倒角的连铸坯轧制情况,修正后的宽展模型预报精度显著提高。
The mould with chamfered corner can improve high temperature ductility at continuous casting slab corner in straightening section,and significantly reduce the occurrence of transverse crack. However,the chamfering of the continuous casting slab has a significant effect on the spread during rough rolling. The slab deformation finite element model of rough rolling process was used to study the influence of chamfering side length and shape on the spread during rough rolling. The results show that the larger the chamfering side length,the dog bone spread is smaller produced by the same width reduction,and the natural spread is smaller produced by the horizontal rolling. The chamfering angle had no significant effect on the spread. A modified formula with chamfering parameters was presented. The accuracy of the modified spread prediction model is improved obviously for the continuous casting slab with chamfered corners on base of the comparison with the measured value and the calculated value using the new original spread model.
The mould with chamfered corner can improve high temperature ductility at continuous casting slab corner in straightening section,and significantly reduce the occurrence of transverse crack. However,the chamfering of the continuous casting slab has a significant effect on the spread during rough rolling. The slab deformation finite element model of rough rolling process was used to study the influence of chamfering side length and shape on the spread during rough rolling. The results show that the larger the chamfering side length,the dog bone spread is smaller produced by the same width reduction,and the natural spread is smaller produced by the horizontal rolling. The chamfering angle had no significant effect on the spread. A modified formula with chamfering parameters was presented. The accuracy of the modified spread prediction model is improved obviously for the continuous casting slab with chamfered corners on base of the comparison with the measured value and the calculated value using the new original spread model.
引文
[1]杨春政.典型微合金化钢板坯角部横裂纹产生机理与倒角结晶器技术研究[D].上海:上海大学,2011.(YANG Chunzheng.Study on the Mechanism of Transverse Cracks in Typical Microalloyed Steel Slab and the Technology of Chamfering Mold[D].Shanghai:Shanghai University,2011.)
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[8]曹建新,陶红标,张慧,等.倒角结晶器在涟钢板坯连铸生产中的应用[J].钢铁,2013,48(11):43.(CAO Jian-xin,TAO Hong-biao,ZHANG Hui,et al.Application of chamfering mold in slab continuous casting of Lianyuan Iron and Steel Co[J].Iron and Steel,2013,48(11):43.)
[9]安领军.倒角结晶器在邯宝炼钢厂的应用研究[C]//2013连铸装备技术的科技进步与精细化学术研讨会论文集.西安:中国金属学会,2013:4.(AN Ling-jun.Application of chamfering mold in Handan Iron and Steel Plant[C]//The Continuous Casting Equipment and Refine Technology Conference Proceedings of 2013.Xi'an:The Chinese Society for Metals,2013:4.)
[10]刘洋,王文军,朱志远,等.连铸板坯倒角结晶器技术在首秦公司的成功开发与应用[C]//2012年全国炼钢-连铸生产技术会论文集(下).重庆:中国金属学会,2012:7.(LIU Yang,WANG Wen-jun,ZHU Zhi-yuan,et al.Chamfer mold technology in the Shouqin successfully developed and applied[C]//The National Steelmaking and Continuous Casting Conference Proceedings of 2012 II.Chongqing:The Chinese Society for Metals,2012:7.)
[11]章传国,韩静涛,刘靖,等.立辊调宽热粗轧过程三维有限元模拟[J].塑性工程学报,2006,13(1):74.(ZHANG Chuanguo,HAN Jing-tao,LIU Jing,et al.Three dimensional finite element method simulation of hot rough rolling[J].Journal of Plasticity Engineering,2006,13(1):74.)
[12]刘洋,周旭东,孟惠霞.带钢热连轧过程轧制力三维有限元模拟[J].锻压技术,2007,32(5):142.(LIU Yang,ZHOU Xudong,MENG Hui-xia.Three dimensional finite element simulation of rolling force during continuous hot strip rolling process[J].Forging and Stamping Technology,2007,32(5):142.)
[13]王爱丽,杨荃,何安瑞,等.热连轧粗轧区FES宽展模型及其优化[J].北京科技大学学报,2010,32(4):515.(WANG Ai-li,YANG Quan,HE An-rui,et al.FES width spread model and its optimization for a rough rolling mill[J].Journal of University of Science and Technology Beijing,2010,32(4):515.)
[14]Sparling L G M.Formula for spread in hot flat rolling[J].Proceedings of the Institution of Mechanical Engineers,1961,175(11):604.
[2]雷松,曾珊,阎建武,等.板坯连铸倒角结晶器的开发与试验应用[J].钢铁技术,2015(3):16.(LEI Song,ZENG Shan,YAN Jian-wu,et al.Development and application of slab continuous casting chamfering mold[J].Journal of Iron and Steel Technology,2015(3):16.)
[3]何宇明,胡兵,周宏,等.宽厚连铸板坯角部裂纹控制技术开发[J].钢铁,2016,51(7):34.(HE Yu-ming,HU Bing,ZHOU Hong,et al.Development of corner crack control technology for continuous casting strand of wide-thick plate[J].Iron and Steel,2016,51(7):34.)
[4]刘延强,尹世超,王雷川,等.板坯角横裂成因及控制措施[J].中国冶金,2016,26(11):58.(LIU Yan-qiang,YIN Shi-chao,WANG Lei-chuan,et al.Formation reasons and counter-measures of transverse corner cracks in continuous casting slabs[J].China Metallurgy,2016,26(11):58.)
[5]张丽丽,马威,刘国梁,等.迁钢倒角结晶器技术开发及应用[J].世界金属导报,2016-05-31(B07).(ZHANG Li-li,MA Wei,LIU Guo-liang,et al.Development and application of chamfering technology for moving steel in Qian'an steel mills[J].World Metal Herald,2016-05-31(B07).)
[6]李俊伟,杨新泉,唐树平,等.倒角结晶器在武钢板坯连铸中的应用[C]//第十届中国钢铁年会暨第六届宝钢学术年会论文集II.上海:中国金属学会,宝钢集团有限公司,2015:5.(LI Jun-wei,YANG Xin-quan,TANG Shu-ping,et al.Application of chamfering mold in Wuhan Iron and Steel slab continuous casting[C]//The 10th China Iron and Steel Annual Conference and the 6th Baosteel Academic Annual Conference Proceedings II.Shanghai:The Chinese Society for Metals,Baosteel Group Ltd.,2015:5.)
[7]郭景瑞,许斌,魏广民,等.倒角结晶器在邯钢的应用及创新[J].河北冶金,2014(12):6.(GUO Jing-rui,XU Bin,WEI Guang-min,et al.The application and innovation of chamfering crystallizerin Han Steel[J].Hebei Metallurgy,2014(12):6.)
[8]曹建新,陶红标,张慧,等.倒角结晶器在涟钢板坯连铸生产中的应用[J].钢铁,2013,48(11):43.(CAO Jian-xin,TAO Hong-biao,ZHANG Hui,et al.Application of chamfering mold in slab continuous casting of Lianyuan Iron and Steel Co[J].Iron and Steel,2013,48(11):43.)
[9]安领军.倒角结晶器在邯宝炼钢厂的应用研究[C]//2013连铸装备技术的科技进步与精细化学术研讨会论文集.西安:中国金属学会,2013:4.(AN Ling-jun.Application of chamfering mold in Handan Iron and Steel Plant[C]//The Continuous Casting Equipment and Refine Technology Conference Proceedings of 2013.Xi'an:The Chinese Society for Metals,2013:4.)
[10]刘洋,王文军,朱志远,等.连铸板坯倒角结晶器技术在首秦公司的成功开发与应用[C]//2012年全国炼钢-连铸生产技术会论文集(下).重庆:中国金属学会,2012:7.(LIU Yang,WANG Wen-jun,ZHU Zhi-yuan,et al.Chamfer mold technology in the Shouqin successfully developed and applied[C]//The National Steelmaking and Continuous Casting Conference Proceedings of 2012 II.Chongqing:The Chinese Society for Metals,2012:7.)
[11]章传国,韩静涛,刘靖,等.立辊调宽热粗轧过程三维有限元模拟[J].塑性工程学报,2006,13(1):74.(ZHANG Chuanguo,HAN Jing-tao,LIU Jing,et al.Three dimensional finite element method simulation of hot rough rolling[J].Journal of Plasticity Engineering,2006,13(1):74.)
[12]刘洋,周旭东,孟惠霞.带钢热连轧过程轧制力三维有限元模拟[J].锻压技术,2007,32(5):142.(LIU Yang,ZHOU Xudong,MENG Hui-xia.Three dimensional finite element simulation of rolling force during continuous hot strip rolling process[J].Forging and Stamping Technology,2007,32(5):142.)
[13]王爱丽,杨荃,何安瑞,等.热连轧粗轧区FES宽展模型及其优化[J].北京科技大学学报,2010,32(4):515.(WANG Ai-li,YANG Quan,HE An-rui,et al.FES width spread model and its optimization for a rough rolling mill[J].Journal of University of Science and Technology Beijing,2010,32(4):515.)
[14]Sparling L G M.Formula for spread in hot flat rolling[J].Proceedings of the Institution of Mechanical Engineers,1961,175(11):604.