What is semi-solid metal casting?
A. This semi-solid metal casting process (SSM) uses a special cast billet which is cut into heated slugs at special casting machines. The uniform, globular semi-solid microstructure of the heated slugs provides flow characteristics capable of filling the casting die under high pressure: gas entrapment is substantially eliminated and solidification shrinkage reduced. Early qualification of parts for structural automotive applications has been successful. The process can cast thinner walls than squeeze casting and has proven suitable for use with both aluminum and magnesium alloys. Production costs are higher than for conventional high-pressure die castings, with available production facilities still limited.
