电渣液态浇注空心钢锭的数值模拟

建立了电渣液态浇注空心钢锭体系三维准稳态数学模型,利用商业软件ANSYS与CFX进行顺序耦合求解,得到了电渣液态浇注空心钢锭过程的电场、磁场、温度场与流场.计算结果表明,由于采用了导电结晶器技术,渣池电位、焦耳热分布、磁场分布、流场分布与温度场分布等均有别于传统电渣重熔过程.渣池高温区位于外结晶器壁附近,远离渣金界面,最高温度为2 113 K.渣池流场存在两个漩涡,浮力为主要的驱动力,熔渣最大速度为0.068m.s-1.金属熔池呈浅平状,有利于提高空心钢锭的凝固质量.

Mathematical Simulation of the Electroslag Casting of Hollow Ingot with Liquid Metal

A 3D quasi-steady state mathematical model for the electroslag casting of hollow ingot with liquid metal was developed and then solved with the method of sequential coupling using commercial software ANSYS and CFX to obtain the distributions of electric,magnetic,temperature and flow fields.The calculation results show that the distributions of electric,Joule heat,magnetic,temperature and flow fields in the slag pool are different from those obtained by conventional electroslag remelting,which is attributable to the use of a current conductive mold.The high temperature region is near the outer mold,far from the slag-metal interface,with the highest temperature up to 2 113 K.There are two vortexes in the slag pool,and the slag is driven mainly by buoyancy,with the maximum velocity of slag being 0.068 m·s-1.The shape of molten metal pool is like a shallow dish,which is beneficial to solidification quality of hollow ingots.