平面流铸熔潭行为的数值模拟  

Numerical simulation of melt pool behaviour in planar flow casting

作　　者：李可 常庆明[1,2] 常佳琦 宮晓威 鲍思前[1,2] Li Ke;Chang Qingming;Chang Jiaqi;Gong Xiaowei;Bao Siqian(Faculty of Materials Science,Wuhan University of Science and Technology,Wuhan 430081,China;State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学材料学部,湖北武汉430081 [2]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《武汉科技大学学报》2023年第5期338-346,共9页Journal of Wuhan University of Science and Technology

基　　金：国家重点研发计划专项资助项目(2021YFB3800501).

摘　　要：平面流铸技术在制备无取向硅钢薄带应用方面尚处于起步阶段,为解决这一过程中工艺参数难以确定的问题,本文针对无取向硅钢Fe-3.0%Si平面流铸过程中的气-液两相流动、传热和凝固行为建立了三维数学模型,分析该过程中熔潭的形成过程以及速度场、温度场随时间变化,并探讨了工艺参数对带材厚度和熔潭达到准稳态时间的影响。结果表明,熔潭在达到稳定状态后,上弯月面呈C形,下弯月面呈斜坡状。在熔潭形成过程中,熔潭周围和内部会产生回流现象,这有利于熔潭的散热;在平面流铸过程中,薄带厚度随着喷注速度、喷嘴宽度和喷嘴-冷却辊间距增大而增大,随着冷却辊转速增大而减小,熔潭达到准稳态时间则均随着这些参数的增大而延长。The planar flow casting technique for the preparation of non-oriented silicon steel thin strips is still in its infancy.To address the challenges in defining process parameters,a 3D mathematical model for the gas-liquid two-phase flow,heat transfer,and solidification behavior during the planar flow casting of Fe-3.0%Si was established.The formation of the melt pool during the planar flow casting process,as well as the temporal variations of the velocity and temperature fields,were analyzed,and the effects of process parameters on strip thickness and the time required for the melt pool to reach a quasi-steady state were investigated.The results show that upon reaching a stable state,the upper meniscus of the melt pool assumes a C-shape,while the lower meniscus takes on a sloped shape.During the formation of the melt pool,recirculation phenomena occur both around and inside the pool,facilitating the cooling of the melt.Furthermore,the thickness of the thin strip increases with the increase of injection speed,nozzle width,and nozzle-cooling roll distance,but decreases with the increase of cooling roll speed.The time for the melt pool to reach a quasi-steady state is prolonged with the increase of these parameters.

关 键 词：Fe-3.0%Si 无取向硅钢 平面流铸 薄带 熔潭 数值模拟 

分 类 号：TG249.9[金属学及工艺—铸造]