本文系统地考察了Sb,Bi,Al,Sn,Pb等微量元素对稀土球铁组织与性能的影响;研究了它们对稀土球铁和镁球铁的不同作用及其机制;探讨了通过微量元素和碱土金属的多元复合匹配改善稀土球铁组织与性能的途径,并在此基础上研究了一种新型高强稀土球铁。 The effects of Sb, Bi, Al, Sn, Pb and other trace elements on microstructure and properties of rare earth ductile iron were systematically investigated. Their different effects on rare earth ductile iron and ductile iron were also studied. The effects of trace elements And alkaline earth metal multiple compound match to improve the microstructure and properties of rare earth ductile iron, and on this basis, a new type of high strength rare earth ductile iron was studied.