The present work shows that the refinement and the dis-union of phosphides treated by instantaneous ladle inoculation and 2-step normalizing improve the mechanical properties of high phosphorus content nodular cast iron. 本工作表明:经过包外孕育和两阶段正火处理后,使磷共晶细化、分割,能促使高磷球墨铸铁的机械性能提高。