国内连铸生产工艺对铸坯内部质量的影响  

Research and practice on influence of domestic continuous casting process on internal quality of billet

作　　者：王敬忠[1] 涂凯 包汉生[2] 陈其为 吴明华 王宝顺 丁斌华 张伟 WANG Jingzhong;TU Kai;BAO Hansheng;CHEN Qiwei;WU Minghua;WANG Baoshun;DING Binhua;ZHANG Wei(School of Metallurgy and Engineering,Xi'an Universitiy of Architecture and Technology,Xi'an 710055,Shaanxi,China;Institute for Special Steels,Center Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;Yongxing Special Stainless Steel Co.,Ltd.,Huzhou 313012,Zhejiang,China;Zhejiang Jiuli Special Material Technology Co.,Ltd.,Huzhou 313012,Zhejiang,China;Citic Microalloying Technology Center,Beijing 100004,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]钢铁研究总院有限公司特殊钢研究院,北京100081 [3]永兴特种不锈钢股份有限公司,浙江湖州313012 [4]浙江久立特材科技股份有限公司,浙江湖州313012 [5]中信微合金化技术中心,北京100004

出　　处：《连铸》2023年第5期11-20,共10页Continuous Casting

基　　金：国家重点研发计划资助项目(2021YFB3704102)。

摘　　要：针对国内连铸生产中铸坯凝固缺陷的现状,从过热度、结晶器电磁搅拌、拉坯速度、二次冷却强度及配水制度、二冷区电磁搅拌、末端电磁搅拌、凝固末端压下制度、矫直辊安装精度等影响连铸坯中心偏析、缩孔、缩松及凝固裂纹等缺陷的主要因素入手,分析了各因素对连铸坯凝固缺陷的影响规律,阐述了为改善连铸坯凝固质量的工艺参数调整要点。近年来,国内很多钢铁企业根据现场的生产条件,在改善连铸坯内在质量、提高连铸坯生产效率等方面做了大量工作,生产效率和铸坯质量都得到了大幅度提高。为满足国内高端制造对高品质钢铁材料的迫切需求,亟需行业科技工作者结合冶金凝固原理对连铸工艺开展进一步的精研细究,进而制造出高凝固质量的连铸坯。In view of the research status of solidification defects of casting billets in domestic continuous casting pro-duction,the main factors affecting the defects such as center segregation,shrinkage cavity,shrinkage porosity and solidification crack of continuous casting billets are discussed,including superheat,electromagnetic stirring of crys-tallizer,drawing speed,secondary cooling intensity and water distribution system,electromagnetic stirring in sec-ondary cooling zone,final electromagnetic stirring,pressing down system of solidification end,and installation accu-racy of straightening roller.The influence of various factors on the solidification defects of continuous casting billet was analyzed,and the key points of technological parameter adjustment for improving the solidification quality of continuous casting billet were expounded.In recent years,many domestic iron and steel enterprises have done a lot of work in improving the internal quality of continuous casting billet and improving the production efficiency of con-tinuous casting billet according to the production conditions on the spot.The production efficiency and the quality of casting billet have been greatly improved.However,in order to meet the urgent demand for high-quality iron and steel materials in domestic high-end manufacturing,it is urgent for scientific and technological workers in the indus-try to carry out further intensive study on the continuous casting process in combination with metallurgical solidifica-tion principle,so as to produce high solidification quality continuous casting billet.

关 键 词：连铸坯 工艺参数 中心偏析 中心缩孔 夹杂物 

分 类 号：TF777[冶金工程—钢铁冶金]