45钢连铸矩形坯中心疏松和缩孔的研究  

Study on center porosities and shrinkage cavities of rectangular blooms in continuous casting of 45 steel

作　　者：储鸿文[1] 留津津[2] 金进文[1] 吴华杰[3] 叶俊辉[1] 包燕平[2] 

机构地区：[1]杭州钢铁集团公司转炉炼钢厂,浙江杭州310022 [2]北京科技大学冶金与生态工程学院,北京100083 [3]北京科技大学冶金工程研究院,北京100083

出　　处：《炼钢》2011年第3期60-63,共4页Steelmaking

摘　　要：针对杭州钢铁集团公司45钢连铸矩形坯(240mm×280mm)的中心疏松和缩孔缺陷,分析了矩形坯中心疏松和缩孔的形成机理及影响因素,并提出了加强工艺控制、优化二冷水量、应用动态二冷配水和优化结晶器电磁搅拌参数等解决措施,使中心疏松和缩孔缺陷得到有效控制。生产实践表明,1级(含)以上的中心疏松缺陷大幅度降低;0.5级(含)以上缩孔的发生率由改进前的46.15%降低到22.31%,且1级(含)以上的缩孔基本消除。In light of the defects of center porosities and shrinkage cavities of 240 min× 280 mm 45 steel the formation mechanism and influence factors of those defects are analyzed and thereupon such a few technical measures as strengthening technological control, optimizing the flow rate of secondary cooling water, applying dynamic secondary cooling and optimizing M-EMS parameters are proposed. The results show that center porosities （≥1.0） are obviously decreased and basically eliminated. The occurring rate of shrinkage cavities is decreased from 46. 15%to 22. 31%, and shrinkage cavities （≥ 1. 0） basically eliminated.

关 键 词：连铸 矩形坯 中心疏松 缩孔 动态配水 

分 类 号：TF761.3[冶金工程—钢铁冶金]