Abstract
A new melt combination process which can control the graphite morphology from spheroidal, compacted-vermicular to flake in cast iron has been developed by a modified Inmold process. Two reaction chambers were prepared in one sand mould. One reaction chamber was for spheroidizing and the other was for inoculating. After being poured into the sprue, the molten iron, of a given chemical composition, was separated in the runner and passed through each reaction chamber. The separated metal streams then collided with each other and filled the cavity. As a result, a new iron, with one side having the properties of spheroidal graphite cast iron and the other the properties of flake graphite cast iron, was produced. The graphite structure has usually been controlled using filters, dams or chillers.
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