摘要
采用射钉法测量了不同拉速下的凝固坯壳厚度。建立了铸坯凝固传热模型,计算得到凝固坯壳生长曲线。基于射钉试验和数学模型计算结果,提出凝固末端电磁搅拌(F-EMS)的最佳安装位置应为距结晶器弯月面10.23m处。结合SWRH82B高碳钢连铸生产实际,将F-EMS安装位置由距弯月面11.1m上移至距弯月面9.75m。结果表明,工艺参数优化后,SWRH82B铸坯的等轴晶率由优化前的40%~46%提高到50%~64%,中心碳偏析指数由优化前的1.08~1.10降低到1.04~1.06,连铸坯质量得到显著改善。跟踪轧材质量发现,SWRH82B盘条的网状碳化物减少,轧材质量得到较大提高。
The thickness of the solidified shell at different casting speeds was measured by the nail-shooting method.The solidification heat transfer model of the round billet was established and the growth curve of the solid shell was calculated.Based on the results of the nail-shooting experiment and the mathematical model,the optimized installation position of the final electromagnetic stirring(F-EMS)should be located at 10.23 mfrom the mold level.In consideration of plant conditions for the continuous casting of SWRH82 Bhigh carbon steel,the FEMS installation position was moved from 11.1 mto 9.75 mfrom the meniscus.The results show that after the process parameters optimization,the equiaxed crystal ratio in SWRH82 Bround billet is increased from 40%~46%before optimization to 50%~64%,and the central carbon segregation index is decreased from 1.08~1.10 before optimization to 1.04~1.06.The quality of continuous casting round billets has been improved significantly.Through tracking the quality of the rolled sheet,it is found that the network carbide in the SWRH82 Bwire rod is reduced,which indicates that the quality of the rolled sheet is improved greatly.
作者
陈丰
许秀杰
杨子江
刘福兵
邓安元
王恩刚
Chen Feng;Xu Xiujiee;Yang Zijiang;Liu Fubing;Deng Anyuan;Wang Engang(Tianjin Rockcheck Steel Group Co.,Ltd.;Key Laboratory of Electromagnetic Processing of Materials of Ministry of Education,Northeastern University)
出处
《特种铸造及有色合金》
CAS
北大核心
2019年第7期750-753,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(U1760206)
关键词
连铸
凝固
中心偏析
电磁搅拌
Continuous Casting
Solidification
Center Segregation
Electromagnetic Stirring
