钛合金真空自耗熔炼过程中电场的数值模拟

Numerical Simulation of Electric Field in Titanium Alloys by Vacuum Consumable Electrode Arc Remelting

采用有限元计算软件ANSYS建立钛合金真空自耗熔炼过程中坩埚内电磁搅拌的计算模型,通过电磁场计算模块对搅拌过程中熔炼的电流分布情况进行研究。研究结果表明:熔炼过程中所产生的电流主要分布于坩埚壁面上部、熔池表面和电极上,在坩埚及铸锭底部几乎没有电流的分布,电流从坩埚壁经熔池表面流回电极,在熔池表面呈典型的向心分布,电流密度最大值在铸锭与电弧区交界处,通过与实验数据对比从而验证了模拟的可靠性。

The calculation model of electromagnetic stirring in crucible during vacuum consumable electrode melting of titanium alloy was established by using finite element software ANSYS. The current distribution in the process of stirring was studied by using the calculation module of electromagnetic field. The results show that the current generated in the melting process mainly distributes on the top of the crucible wall,the surface of the molten pool and the electrodes. There is almost no current distribution at the bottom of the crucible and the ingot. The current flows back from the crucible wall to the electrode through the surface of the molten pool. The typical centripetal distribution is on the surface of the molten pool. The maximum current density is at the junction of the ingot and the arc zone. By comparing with the experimental data,the reliability of the simulation is verified.