Process for producing rheocast ingots, particularly from which t

Details Process for producing rheocast ingots, particularly from which t Process for producing rheocast ingots, particularly from which t

1993-09-09

1995-11-07

Bradley, P. Austin

Metal founding

Process

Shaping liquid metal against a forming surface

164475, 164415, 164263, 164900, B22D 2700, B22D 1110

Patent

active

054640539

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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Merton C. Flemings, "Behavior of metal alloys in the semi-solid state," Met. Trans. A, vol. 22A, pp. 957-981, May 1991.
Metals Handbook, vol. 15, Casting, pp. 327-331, 459-462 Oct. 1988.
Dr.-Ing. Waldemar Schwarzmaier, "Stranggiesben", 1957 Berliner Union GmbH, Stuttgart, p. 192, lines 22-29.

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