1500 mm×700 mm特厚大型板坯三维鼓肚变形仿真研究  

Three-Dimensional Emulation Research on the Bulging Deformation During Continuously Casting 1500 mm×700 mm Thick and Large Slab

作　　者：郑志勇 张振山[1] 程翔 陈华 ZHENG Zhiyong;ZHANG Zhenshan;CHENG Xiang;CHEN Hua(HeBei Institute Of Mechanical and Electrical Technology,Xingtai 054000,China)

机构地区：[1]河北机电职业技术学院,河北邢台054000

出　　处：《工业技术与职业教育》2022年第3期5-9,共5页Industrial Technology and Vocational Education

基　　金：2021年邢台市市级科技计划自筹经费项目“700mm×1500mm特厚大型板坯立式连铸机辊列布置的研究”(项目编号:2021ZC007),主持人郑志勇。

摘　　要：连铸坯“鼓肚量”的计算对于指导连铸生产过程和预测铸坯质量有着重要的作用。利用有限元软件Ansys建立1500 mm×700 mm特厚大型板坯三维鼓肚仿真模型并对其进行研究。模拟分析过程中,通过建立连铸坯凝固传热的二维切片模型获得1500 mm×700 mm特厚大型板坯凝固过程中坯壳厚度和铸坯表面温度沿铸流方向的分布情况。根据坯壳厚度沿铸流方向的分布情况建立连铸坯三维模型,并且将铸坯表面温度沿铸流方向的分布情况作为模拟分析时的温度初始条件,在支承辊的轴承处施加相应的位移约束,不再把支承辊假设为刚体。得出1500 mm×700 mm特厚大型板坯连铸机密排段的铸坯“鼓肚量”沿铸流方向分布规律和支承段铸坯应力沿铸流方向分布规律。研究显示,考虑支承辊挠度所计算的连铸坯的“鼓肚量”更接近于经验公式的计算值,并且整个连铸坯的“鼓肚量”都满足连铸坯生产要求,验证了其辊列设计的合理性。Calculation of the bulge deformation during the solidification of slab plays an important role in guiding the production of continuous casting and predicting the slab quality.Growth condition of shell and the temperature distribution of 1500 mm×700 mm thick and large slab are obtained through the establishment of the two-dimensional heat-transfer model of continuous casting slab solidification,and on the basis of which the model of three-dimensional bulging deformation on shell is set up by using the finite element method.In the process of simulation,the temperature distribution of the slab is used as the initial conditions of temperature and the corresponding displacement constraints is imposed on the backup roll bearing considering the deflection of backup roll.The bulge deformation'distribution of slab in Continuous casting machine backup roll close section and the stress distribution of slab in continuous casting machine supporting section are gotten through the simulation.Research shows that,compared with no account of the backup roll deflection,the value of the slab'bulge deformation is closer to experience value,and the bulge deformation of the whole continuous casting slab meet the continuous casting production requirements,verifying the rationality of the design of roller column.

关 键 词：特厚大型板坯 三维鼓肚变形 支承辊挠度 鼓肚量 应力分布 

分 类 号：TF31[冶金工程—冶金机械及自动化]