Process for producing spheroidal-graphite cast iron, and spheroidal-graphite cast iron member obtained from said spheroidal-graphite cast iron

The purpose of the present invention is to provide: a process for producing a spheroidal-graphite cast iron having high properties using a spheroidizing agent that contains no rare-earth element; and a spheroidal-graphite cast iron member comprising the spheroidal-graphite cast iron. The invention r...

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Bibliographische Detailangaben
Hauptverfasser:	SATO TAKASHI, NISHIKAWA YUTAKA, KITAHARA MASAKAZU, IDEI HIROSHI, NARITA HIDEKAZU, TOKIYAMA TAKUYA, BABA TSUKASA, HORIYA TAKAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY METALLURGY OF IRON PERFORMING OPERATIONS POWDER METALLURGY PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TRANSPORTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The purpose of the present invention is to provide: a process for producing a spheroidal-graphite cast iron having high properties using a spheroidizing agent that contains no rare-earth element; and a spheroidal-graphite cast iron member comprising the spheroidal-graphite cast iron. The invention relates to obtaining a spheroidal-graphite cast iron having high properties and a spheroidal-graphite cast iron member by subjecting an iron melt to a spheroidization treatment with a spheroidizing agent comprising a Fe-Si-Mg-Ca alloy that contains a given amount of barium and contains substantially no rare-earth element, a first inoculation treatment, and a melt-stream inoculation treatment.