Patent ID: 6769473
Filing Date: 2004-08-03
Classification: B22D,C22C,Y10S

Abstract:
A method of shaping a semisolid metal comprising:(a) feeding into an insulating vessel having an insulating effect (i) a molten alloy, having crystal nucleic, at a temperature not lower than the liquidus temperature of said alloy or (ii) a partially solid, partially molten alloy having crystal nucleic, at a temperature not lower than a molding temperature, (b) maintaining said molten alloy in said insulated vessel for a period from 5 seconds to 60 minutes as said alloy is cooled to the molding temperature at a cooling rate of 0.01Â° C./s to 3.0Â° C./s thereby crystallizing fine primary spherical crystals in an alloy solution thereof containing a specified liquid fraction, and thereafter (c) feeding said alloy solution into a forming mold for shaping said alloy under pressure.