METHOD FOR CONTINUOUSLY CASTING SEMI-SOLIDIFIED METAL AND NOZZLE FOR POURING SEMI-SOLIDIFIED METAL

摘要

PURPOSE:To continuously produce perfectly solidified metal by rapidly solidifying semi-solidified metal with a continuous casting mold directly connected through a pouring nozzle providing an induction heating coil and an electric source for supplying electric power to discharging part in a cooled stirring vessel for producing the semi- solidified metal. CONSTITUTION:Molten metal is continuously supplied into a molten metal receiving vessel 1 and cooling and stirring action are given with cooling and high rotating velocity in the cooled stirring part 4a at tip part of stirrer in gap 3 between the stirring vessel 2 and the stirrer 4 in the stirring vessel 2 to produce the semi-solidified metal 12 and this flows down to the discharging vessel 5. This apparatus has structure supplying the semi-solidified metal into the continuous casting mold 7 from the discharging hole 5 through the pouring nozzle 6, and the proper electric power from the high frequency electric source in the pouring nozzle 6 is impressed to the induction heating coil 6b, and by suitably heating, formation of solidified shell is prevented. In the mold 7, the semi-solidified metal 12 is brought into contact with water cooled wall in the mold body 7a and rapidly cooled, and the solidified shell 12 is formed to make the cast billet 10 and the perfectly solidified cast billet is produced. By this method, the cast billet having uniform and good quality can be obtd.