工艺参数对电渣重熔过程影响的数值模拟  

Numerical Simulation of Influence of Process Parameters on Electroslag Remelting Process

作　　者：杨韬 唐祁峰[1] 张军[2] 彭必友[1] 黄华[3] 普学滔 蒲吉吉 Yang Tao;Tang Qifeng;Zhang Jun;Peng Biyou;Huang Hua;Pu Xuetao;Pu Zhe(School of Materials Science and Engineering,Xihua University,Chengdu 610039,China;Panzhihua Iron and Steel Research Institute Co.,Ltd.of Panzhihua Iron and Steel Group,Panzhihua 617000,China;Jiangyou Great Wall Special Steel Co.,Ltd.of Panzhihua Iron and Steel Group,Jiangyou 621700,China;Yunnan Yunlyu Logistics Investment Co.,Ltd.,Kunming,650502,China;Department of Materials Science and Engineering,Shenzhen MSU-BIT University,Shenzhen 518172,China)

机构地区：[1]西华大学材料科学与工程学院,四川成都610039 [2]攀钢集团攀枝花钢铁研究院有限公司,四川攀枝花617000 [3]攀钢集团江油长城特殊钢有限公司,四川江油621700 [4]云南云铝物流投资有限公司,云南昆明650502 [5]深圳北理莫斯科大学材料科学与工程系,广东深圳518172

出　　处：《华东交通大学学报》2022年第4期66-73,共8页Journal of East China Jiaotong University

基　　金：四川省科技厅重点研发计划项目(2019YFG0511)。

摘　　要：通过建立三维耦合数学模型,探究了电流强度和电极插入渣池深度对G20轴承钢电渣重熔(ESR)过程中温度场和电磁场的影响,计算结果表明:由于集肤效应,电流密度和磁场强度主要集中在铸锭的外表面;因炉渣的电导率较大,体系的焦耳热主要产生于渣池,最高温度位于渣层中心部位;随着电流强度的增加,整个体系电流密度增大,温度提高;而随着电极插入深度从10 mm增加到30 mm,体系的温度呈下降趋势。在1 500 A电流强度、电极插入深度为0.1 m下,体系中心轴线温度最高为2 187℃,渣金界面平均温度大约为1 600℃,均大于钢锭的液相线温度1 493℃,说明该模拟结果能保证重熔后的钢液顺利通过渣层后逐渐凝固形成铸锭,可以为实际生产提供理论参考。By establishing a three-dimensional coupled mathematical model, the effects of the current intensity and the depth of the electrode inserted into the slag pool on the temperature field and electromagnetic field during the electroslag remelting(ESR) process of G20 bearing steel were investigated. The magnetic field strength is mainly concentrated on the outer surface of the ingot. Due to the high electrical conductivity of the slag, the Joule heat of the system is mainly generated in the slag pool, and the highest temperature is located in the center of the slag layer. With the increase of current intensity, the current density of the whole system increases and the temperature increases. And with the electrode insertion depth increased from 10 mm to 30 mm, the temperature of the system showed a downward trend. At the current intensity of 1 500 A and the electrode insertion depth of0.1 m, the maximum temperature of the central axis of the system is 2 187 ℃, and the average temperature of the slag-gold interface is about 1 600 ℃, which are all greater than the liquidus temperature of the steel ingot,which is 1 493 ℃. The molten molten steel passes through the slag layer and gradually solidifies to form an ingot, which can provide a theoretical reference for actual production.

关 键 词：电渣重熔 数值模拟 电磁场 温度场 工艺参数 

分 类 号：TF142[冶金工程—冶金物理化学] U214[交通运输工程—道路与铁道工程]