化学成分与各种工艺因素对稀土镁铁素体球铁的机械性能及质量的稳定性有很大影响。一、化学成分对机械性能的影响为获得铁素体球铁较好的综合机械性能,尤其是高的韧性,除了要有均匀细小的圆整石墨球,铁素体含量高以及尽量减少碳化物的含量外,还要求硫化物、三元磷共晶等夹杂物越低越好。 1.碳与硅实践证明,含碳量在3.5～3.7％时,铁素体球铁的综合机械性能较好,含碳量超过 The chemical composition and various technological factors have a great influence on the mechanical properties and the quality stability of rare earth ferrimagnetic ferrite. First, the chemical composition of the mechanical properties of Ferritic ductile iron to obtain a better overall mechanical properties, especially the high toughness, in addition to a uniform fine round graphite ball, ferrite content is high and minimize the carbide Content, but also requires sulfide, ternary phosphorus eutectic inclusions as low as possible. 1. Carbon and silicon Practice has proved that the carbon content of 3.5 to 3.7%, ferrite ductile iron mechanical properties better, more than carbon content