电渣熔铸中渣池深度对金属熔池深度影响的有限元模拟

Research on the Influence of the Depth of Slag Pool on the Depth of Metallic Bath Using FEM in the Process of Electroslag Casting

渣池和金属熔池是电渣熔铸过程中两个最重要的区域。渣池深度是基本的工艺参数,直接影响到熔铸过程的稳定和熔铸效率,金属熔池深度则是重要的目标控制参数,直接影响着熔铸件的结晶,从而影响产品的质量。采用有限元法,耦合求解了渣池电场和渣池及熔池温度场,得出了不同渣池深度条件下金属熔池深度的变化情况。最小二乘拟合模拟结果表明,金属熔池深度与渣池深度呈负线性相关。实验研究验证了模拟结果的正确性。研究结论将为实际生产中优化工艺参数、提高生产率和控制铸锭质量提供参考依据。

The slag pool and the metallic bath are the most important two regions in Electroslag Casting（ESC）. The depth of the slag pool is one of the basic technics parameters,since it affects the stabilization of the process of ESC and the efficiency of casting. On the other hand, the depth of the metallic bath is one of the control parameters during the process of ESC, because it affects the crystallization of the casting product and then the quality of the product. In this paper,with Finite Element Method,we first simulate numerically the coupled thermal field both of the slag pool and metallic bath and electric field by Finite Element Method. And then we analyze the relationship between the depth of the metallic bath and the slag pool. It shows that the former is a linear function of the latter with negative coefficient by fitting with the Least Square Method. The numerical solution is validated by comparison with precise experimental results. These will provide some theoretic gists on optimizing technological parameters, improving efficiency of manufacture and improving the quality of the product in practice.