METHOD FOR PREPARING MOLTEN METAL FOR CASTING AT SUPERHEATING TEMPERATURES AS LOW AS ZERO

Abstract

The invention proposes a method for preparing molten metal for casting at superheated temperatures ranging from low to zero, consisting of the following steps: placing a heat separator into the molten metal and simultaneously creating a strong counter-current to ensure the molten metal is cooled almost simultaneously. Afterward, the heat separator is quickly removed when the superheated temperature is reached. Finally, the cooled molten metal is rapidly transferred to a mold for casting into parts or to a hollow cylinder for transfer into the mold. The method is performed in such a way that a small amount of solid is formed in the molten metal. In this case, the key point of the invention is that the method must be performed quickly to maintain the particles in a fine, dispersed state without hindering the flow and to improve the quality of the resulting metal parts. The production cost of the resulting metal parts is lower due to the longer mold life and shorter casting cycle time.