Investigation on the Removal of Inclusions Form Aluminum Melt Using Alternating Combined Magnetic Field

Abstract:

In this study, the effect of alternating combined magnetic field composed (CMF) of downward travelling magnetic field (TMF) and alternating rotating magnetic field (RMF) to remove the inclusions from aluminum melt was investigated and primary silicon particles precipitating from the solidification of Al-Si hypereutectic alloy were regarded as inclusions need removing. Inclusions particles agglomerated into clusters and migrated to the top of the melt under alternating CMF. It was found alternating CMF had a better removing effect than oriented CMF composed of oriented RMF and downward TMF. The removing effect of alternating CMF increased when the current and frequency of alternating RMF consisting of alternating CMF increased. Alternating CMF had the best removing effect when the alternating time was at 10s.