3Cr钢连铸过程的数值模拟  

Numerical Simulation of Continuous Casting Process of 3Cr Steel

作　　者：崔艳雨[1] 秦永祥 CUI Yanyu;QIN Yongxiang(Airport College,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学机场学院,天津300300

出　　处：《热加工工艺》2021年第15期51-56,共6页Hot Working Technology

摘　　要：基于多物理场仿真软件COMSOL建立了3Cr钢连铸的二维模型,研究了模具外侧总传热系数、浇铸速度、浇铸温度对3Cr钢连铸过程的影响。结果表明:模具表面总传热系数与模具中3Cr钢的最低温度呈负相关,即传热系数越大,最低温度越小;为了保证钢棒质量,模具表面总传热系数应为600~800 W/(m^(2)·K)。当浇铸速度介于1.0~2.0mm/s时,糊状区的宽度几乎不随浇铸速度的增大而改变,浇铸速度对糊状区的影响不大,但浇铸速度应低于2.0 mm/s,否则在模具底端会出现3Cr钢非完全凝固的现象。随着浇铸温度的增加,在糊状区所产生的涡流强度减小,已凝固的3Cr钢的最大Von Mises应力降低。Based on multiphysics simulation software COMSOL, a two-dimensional model of 3Cr steel continuous casting was established. The effect of the total heat transfer coefficient of the mold, the pouring speed and the pouring temperature on the continuous casting process of 3Cr steel were studied. The results show that the total heat transfer coefficient of the mold surface is negatively correlated with the lowest temperature Tminof 3Cr steel in the mold, which means the bigger the heat transfer coefficient, the smaller the lowest temperature. In order to ensure the quality of the steel rod, the total heat transfer coefficient of the mold surface should be 600-800 W/(m^(2)·K). When the pouring speed is 1.0-2.0 mm/s, the width of the mushy zone hardly changes with the increase of the pouring speed, and the pouring speed has little effect on the mushy zone. While the pouring speed should be less than 2.0 mm/s, otherwise there will be incomplete solidification phenomenon of 3Cr steel at the bottom of the mold. With the increase of the pouring temperature, the eddy current intensity generated in the mushy zone and the maximum Von Mises stress in the solidified 3Cr steel decrease.

关 键 词：3Cr钢 连铸 数值模拟 

分 类 号：TG249.7[金属学及工艺—铸造]