Patent ID: 6851466
Filing Date: 2005-02-08
Classification: B22D,C22C,Y10S

Abstract:
1. A method of shaping a semisolid metal comprising: (a) feeding, without using a cooling jig, into an insulating vessel having an insulating effect, a molten alloy containing an element for promoting generation of crystal nuclei and being held to be superheated to less than 100° C. above a liquidus temperature of the alloy; (b) maintaining said molten alloy in said insulating vessel for a period of 5 seconds to 60 minutes as said alloy is cooled to a molding temperature at a cooling rate of 0.01° C./s to 3.0° 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.