Abstract
Understanding the complex physical fields during electromagnetic DC casting remains limited through experiments as these physical quantities are hard to measure in a molten melt. Numerical simulation is a desirable way to make clear the physical field involved when investigating the parameters of DC casting. The present work used a two-dimensional multi-field coupling model based on the finite element method and investigated the influences of out-of-phase pulsed magnetic field (PMF) on the transient fluid flow and heat transfer process during the direct chill (DC) casting of an AZ80 magnesium alloy billet with a diameter of 500 mm. Effects of pulsed parameters (current intensity, frequency, duty cycle and phase difference) on transient Lorentz force, melt oscillation behavior, temperature field and solidification characteristic were investigated systematically. Results show that in order to realize desirable metallurgical transport behaviors, including the forceful stirring and vibration with a certain intensity and depth, uniform temperature distribution, and faster cooling rate, the pulsed parameters should be set within a reasonable range, that is, the current intensity is 250 A, the frequency is 10 Hz, the duty cycle is 20% and the phase difference is between 36° and 72°
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
