Process for producing rheocast ingots, particularly from which to produce high-mechanical-performance die castings
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United States of America Patent
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Nov 7, 1995
Grant Date -
N/A
app pub date -
Sep 9, 1993
filing date -
Sep 29, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for semiliquid casting ingots from which to produce high-mechanical-performance die castings, whereby a metal alloy in the form of pigs and containing ceramic particles is smelted in a smelting furnace, transferred to a ladle, degassed, and fed into a pressurized furnace from which it is cast in the semiliquid state by feeding it at the solidification stage and under laminar flow conditions into a static mixer. At the outlet of the mixer the rheocast material is collected under laminar flow conditions, possibly with the interposition of a siphon type collecting tank and with protective gas shielding, through a cooled metal die, and solidified into a single billet. The billet is then guided by rollers past a saw and cut into pieces from which to obtain ingots of desired weight and size.
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