抄録
The Partial Melt Treatment Process was developed by the authors. A plate-like mold cavity was separated into a reaction chamber and product cavity by a thin dam. The alloy of FeSiMg alloy for spheroidization of base molten metal was prepared in the chamber. The base molten metal was poured up into an ingate from the bottom of the product cavity. A part of the molten metal flowed into the reaction chember over the dam. After spheroidization reaction in the chamber, spheroidized molten metal counterflowed over the dam and filled the upper part of the whole cavity. As a result of flow and replacement of both melts, a transitional graphite structure layer from spheroidal to flake downward was formed in the product. The effects of dam height, reaction chamber shape and treatment alloy on the quantitative control of the graphite layer ratio in the product were investigated.
