外加电磁场作用下铸锭冒口凝固过程数值模拟研究  

Numerical simulation on solidification process of ingot risers under external electromagnetic fields

作　　者：顾涛[1] 李静文 张帅鑫 刘化峰 王明家[3] 赵宇宏[1] 侯华[1] GU Tao;LI Jingwen;ZHANG Shuaixin;LIU Huafeng;WANG Mingjia;ZHAO Yuhong;HOU Hua(School of Materials Science and Engineering,North University of China,Taiyuan,Shanxi 038507,China;PetroChina Natural Gas Sales Branch Jiangxi Province Company,Nanchang,Jiangxi 330000,China;School of Materials Science and Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China)

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]中石油天然气销售分公司江西省公司,江西南昌330000 [3]燕山大学材料科学与工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2021年第2期134-141,共8页Journal of Yanshan University

基　　金：国家自然科学基金资助项目(51801189,51804279);山西省科技重大专项基金资助项目(20181101002);山西省青年自然科学基金资助项目(201801D221145,201801D221150,201801D221153);山西省高等学校科技创新项目(2019L0514,2019L0526)。

摘　　要：为了强化铸锭冒口补缩效果,在冒口区域外加电磁场,在电磁场作用下控制冒口凝固过程。通过ANSYS模拟计算外加电流强度、频率等对铸锭冒口凝固过程中电磁场与温度场分布影响规律。结果表明:感生焦耳热可有效补偿冒口热量损失,改善温度场分布,随着电流强度和电源频率的增加,冒口温度场分布越均匀,电流I=1000 A,频率f=2200 Hz时,冒口径向温差仅为42 K。同时,冒口补缩通道角也受外界电磁作用而得到改善,由88°增至130°,冒口补缩效果得到明显提升。In order to enhance the ingot riser feeding efficiency,electromagnetic fields were used to control the solidification process of the riser.By using the ANSYS software,the influence of current intensity and frequency on the distribution of electromagnetic fields and temperature fields during the solidification process of the ingot riser was analyzed.The results showed that the induced Joule heat can effectively compensate the heat loss and improve the distribution of temperature fields.The temperature field was improved with the current intensity and the frequency of the input power.With parameters of the current of 1000 A and the frequency of 2200 Hz,the difference of temperature distribution along radical distribution can reach about 42 K.Meanwhile,the angle of the feeding channels was also increased from 88°to 130°by applying external electromagnetic fields and,thereby,riser efficiency was significantly improved.

关 键 词：冒口 感应加热 数值模拟 ANSYS 铸锭 

分 类 号：TH16[机械工程—机械制造及自动化]