摘要
针对重轨钢连铸坯在不同压下量条件下的热/力学行为,利用有限元仿真技术建立三维热力学耦合模型,对方坯在连铸过程和压下过程中的内部缩孔变形行为、铸坯应变分布现象、铸坯的变形行为以及拉矫机所需要的压坯力展开深入研究。结果表明,增大压下量可以将更多的变形量传递至铸坯中心、更好地闭合中心缩孔,但同时所需要的拉矫机压坯能力也更大。应综合考虑生产需求和生产能力,选择最合适的压下工艺,这为方坯的压下工艺制定提供理论和数据支撑。
Three-dimensional models is established using finite element simulation technology aiming to study the thermal/mechanical behavior of continuous casting bloom under different reduction amounts for heavy-haul railway rails steel.The bloom′s internal shrinkage deformation behavior,strain distribution phenomenon,deformation behavior of the bloom and the reduction force required by the tension leveler in the casting and reduction process is analyzed in this study.The result shows that increasing the reduction amount can make the deformation transferred to the center more and the center void close better,but at the same time the larger pressing capacity of the machine is required.The production requirements and production capacity should be considered comprehensively so the most suitable reduction process can be selected,which provides theoretical and data support for the designation of the bloom′s reduction process.
作者
胡文广
祭程
朱苗勇
HU Wen-guang;JI Cheng;ZHU Miao-yong(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,Liaoning,China)
出处
《连铸》
2021年第4期2-6,共5页
Continuous Casting
基金
国家重点研发计划资助项目(2017YFB0304502)
国家自然基金面上资助项目(51974078)
中央高校基本科研业务资助项目(N182515006,N2125018)。
关键词
大方坯
连铸压下
凝固传热
缩孔闭合
数值模拟
工艺设计
bloom
casting reduction
solidification heat transfer
shrinkage closure
numerical simulation
technology design
