METHOD FOR PRODUCING SPHEROIDAL GRAPHITE CAST IRON AND VEHICLE COMPONENT USING SAID SPHEROIDAL GRAPH

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The objective of the present invention is to provide a high-performance spheroidal graphite cast iron that uses a spheroidizing agent that does not contain a rare earth element. The present invention pertains to a method for producing a spheroidal graphite cast iron having a specific final composition by performing spheroidizing processing using a spheroidizing agent that is an Fe-Si-Mg-Ca-based alloy that does not contain a rare earth element, performing inoculation processing using a first Fe-Si-based inoculation agent, and then performing molten pouring inoculation processing using a predetermined amount of a second Fe-Si-based inoculation agent containing 45-75% of Si, 1-3% of Ca, and no greater than 15 ppm of Ba.