球形石墨铸铁

延性铁主要由铁，碳和硅.组成时，将球状化剂添加到熔融铁中，主要作为球形石墨沉淀，从而导致凝固性铁的固化.的含糖铁的常规生产过程，涉及3次降解液位，以添加稀有量{ magnesium promotes the formation of carbides, silicon must also be added to counteract this effect. This treatment results in graphite forming spherical shapes. Unlike gray cast iron, ductile iron does not form eutectic colonies during the solidification process. Typically, the size of the graphite spheres is about 1.0% of灰铸铁中形成良好的共晶菌落的菌落。