SiC can be used not only as a component modifier but also for cost reduction. In this study, the effects of SiC on the mechanical properties of flake graphite cast iron were investigated by changing the purity and amount of SiC. The addition of SiC to chilled pure pig iron was found to be ineffective because SiC promotes the crystallization of D-type and E-type graphite and decreases the strength of cast iron. However, it is possible to promote the crystallization of A-type graphite according to the type of inoculant. The molten metal treatment is known to be effective for promoting the crystallization of A-type graphite and increase tensile strength, by raising the final solidification temperature. The results of this study showed that when non-chilled pig iron is used, the addition of SiC is effective in terms of both cost and material.
