Development and Application of Qian’an Mould with Chamfered Corner for Continuous Casting of Slabs

摘要：

　　The transverse crack defects with a higher incidence of slab containing Nb,V,B and other micro-alloyed elements,the traditional cooling methods are difficult to avoid brittle zone III of these steels.In this paper,chamfered corner mould was applied for settling the transverse crack defects of slabs containing Nb,V,B and other micro-alloyed elements,and the solidification shrinkage of the molten steel was studied by the numerical simulation.The diversification chamfered mold was designed based on the solidification shrinkage of the molten steel,the solidification shrinkage rule is that solidification shrinkage rate is faster in the upper part of the mold and slower in the down part of the mould.A series of technology come into being when investigating the chamfered mold technology,for example,the optimization of dummy bar head shim,the chamfered corner mould on-line width adjustment technology,the chamfered corner mould insert partition into different steel grades technology,cutting the chamfered corner slab technology and so on.The chamfered mould is applied to the Qianan continuous casters and production is all right and very steady,the life of the chamfered mould reaches to the life of traditional mould or more.The application of mould with chamfered corners improves the slab cooling and stress state,the chamfered mould is applied to the crack-sensitive steels,such as pipeline steel,wheel steel,crossbeam steels and so on.The ratio of total slab transverse corner crack was reduced from 4.16%to 0.6%or less.The chamfered mould is good to cold rolled steels too.The application of mold with chamfered corners and the low temperature coming out of the oven,the fuel consumption is lower and the edge surface defects of hot rolled strip reduced from 4.69%to 0.5%or less.

关键词： chamfered corner mould continous casting of slab transvers corner crack numerical simulation high temperature mechanical properties

作者: Guoliang LIU Yanzhao LUO Bin CHEN Haibo LI Chenxi JI Ke LIU Lijun ZHANG Wei MA Yinghua ZHANG

作者单位: Shougang Research Institute of Technology,Beijing 100043,China;State Key Laboratory of Advanced Meta Shougang Research Institute of Technology,Beijing 100043,China Shougang Qianan Iron & Steel Co.,Ltd.,Qianan 064404,China

会议类型: 国际会议

会议名称: the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)

会议地点: 北京

会议语种:英文

页码: 696-699

在线出版日期: 2015-05-12（万方平台首次上网日期，不代表论文的发表时间）