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本文研究了稀土对Ｆｅ－Ｃ－Ａｌ－Ｓｉ铸铁的石墨形态，基体组织，力学性能及激冷倾向的影响。随１~＃稀土量增加，石墨由片状向蠕虫状转变较快，但由蠕虫状向球状转变很慢，故具有较大的蠕化范围。铸铁的强度在０．３～１．２％１~＃稀土范围内随稀土的增加而增加，但在１．２～２．０％范围内稍有下降。稀土具有较强的促进激冷倾向的能力，而铝具有抑制或消除激冷倾向的作用。孕育能显著降低激冷倾向，且其效果比普通铸铁更明显。并对有关机理进行了讨论。
In this paper, the effects of rare earth on graphite morphology, matrix structure, mechanical properties and chilling tendency of Fe-C-Al-Si cast iron were studied. With the increase of 1 ~ # Rare Earth, graphite changes rapidly from flake to worm, but worm to ball changes very slowly, so it has a larger range of vermicularity. The strength of cast iron increases with the increase of rare earth in the range of 0.3-1.2% 1 ~ # rare earth, but slightly decreases in the range of 1.2-2.0%. Rare earth has a strong ability to promote chilling tendency, while aluminum has the role of inhibiting or eliminating chilling tendency. Inoculation can significantly reduce the chilling tendency, and its effect is more obvious than ordinary cast iron. And discussed the mechanism.