Patent ID: 6550526
Filing Date: 2003-04-22
Classification: B01F,B22D,C22B,F27B,F27D,Y02P

Abstract:
A process for preparing a melt of particle-reinforced Al and Mg alloy for low-pressure casting comprising the steps of:providing an induction crucible furnace having a melting chamber formed of electrically non-conductive, non-magnetic refractory material; providing an induction coil extending around the outside of the melting chamber; filling the melting chamber with a batch of stock material which is sufficient for a plurality of casting operations; subjecting the induction coil to a high frequency of more that 500 Hz for direct inductive heating and melting down of the stock material; subsequently subjecting the induction coil to a low frequency less than or equal to 50 Hz for heat retention and agitation of the stock material; and maintaining the melted Al and Mg alloy with the reinforcing particles dispersed therein by the low frequency agitation.