PROCESS FOR PRODUCING SPHEROIDAL-GRAPHITE CAST IRON, AND SPHEROIDAL-GRAPHITE CAST IRON MEMBER OBTAI

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An object of the present invention is to provide a process for producing spheroidal graphite cast iron having high properties using a spheroidizing agent containing no rare-earth element and to provide a spheroidal graphite cast iron member including the spheroidal graphite cast iron. The present invention relates to obtaining spheroidal graphite cast iron having high properties and a spheroidal graphite cast iron member by subjecting a molten iron to a spheroidization treatment using a spheroidizing agent of an Fe-Si-Mg-Ca-based alloy which contains a given amount of Ba and contains substantially no rare-earth element and to a primary inoculation treatment and a pouring inoculation treatment.