Analysis and Treatment of Spheroidization Decaying in Large Section Ductile Iron Parts

In producing ductile iron,the graphite morphology in cast iron often changes.Especially in producing large cross-section ductile iron parts,the graphite in the casting center often produce spheroidization decaying.By analyzing the reasons of spheroidization decaying,the related measures,strictly controlling chemical composition of iron melt,right using nodulizer and so on,were put forward,the quality of large section ductile iron parts improves.