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Forming process when an ingot is heated in an induction coil to the semi-solid state and then pressed into a preheated mold.

Illustration of Thixocasting

The process

The method belongs to the semi-solid metal casting type. An ingot [1] with a non-dendritic structure must first be heated to a temperature between the metal liquidus and solidus. The heating is by induction heating and gives a 30-65% solid metal in which the primary phase has a globular structure to achieve a low viscosity that is necessary for the processing to occur.

The ingot is then placed in a chamber [2], a plunger [3] presses the ingot into a preheated mold. The ingot then assumes the shape of the mold chamber and when the ingot is partially cooled, the pressure is taken away and the casting process is completed.