A 2-D Finite Element Model Simulation of the MeltingProcess of Al-Ti Alloy in Vacuum Induction Furnace withCold Crucible （VIFCC）

摘要

The development of a numerical model for the melting process of Al-Ti alloy targetmaterial in vacuum induction furnace with cold crucible（VIFCC）was described. Themodel was two-dimensional and computed the evolution of the electromagnetic field,the heat transfer field and fluid flow field with time. Based on the aid of the finiteelement method with the commercial software（ANSYS）, a superimposition methodof a layer of copper and a slit to simulate the VIFCC melting process was used. Themethod was effective to save large quantity of memory and computing time.Meanwhile, a temperature distribution profile during the melting process wasobtained. Validity of the model was confirmed by comparison between the result fromcalculation and those from direct measurement by optical pyrometer and indirectinvestigation by ingot macrostructure. A relatively good agreement was found. Further,a nearly directional solidification structure was obtained under properly controllingthe cooling rate and heating power. Therefore, such model developed in this article isfeasible.