A Numerical Study on the Influence of an Axial Magnetic Field (AMF) on Vacuum Arc Remelting (VAR) Process

Abstract A comprehensive numerical model is proposed to study the influence of an axial magnetic field (AMF) on solidification behavior a Titanium-based (Ti–6Al–4V) vacuum arc remelting (VAR) ingot. Both static and time-varying AMF are examined. The 2D axisymmetric swirl includes calculating electromagnetic thermal fields in entire system composed electrode, plasma, ingot, mold. combination vector potential formulation induction equation accurately. Calculations flow melt pool ingot also carried out. All governing equations presented cylindrical coordinate. presence weak AMF, such as earth field, can dramatically pattern pool. “Electro-vortex flow” predicted ignoring or AMF. However, “Ekman pumping” amount side-arcing has no depth Modeling results validated against experiments.