用保温模似法和附铸试样试验 ,研究了新型压块状钇基重稀土复合球化剂的球化处理工艺及其球化效果和抗球化衰退性。结果表明 ,压块状钇基重稀土复合球化剂与熔配式球化剂 ,按一定比率 (质量分数不超过50 % )混合使用 ,可以获得较好的球化处理效果。可以在质量要求高的中小截面重要球铁铸件上应用。 By using the thermal insulation simulation method and the cast-in-mold test, the spheroidization process, the spheroidization effect and the anti-spheroidization degeneration of the new type of compact yttrium-based heavy rare earth composite nodulizer were studied. The results show that the nodular yttrium-based heavy rare earth composite nodulizer and the melt-mixing nodulizer are mixed and used at a certain ratio (mass fraction not more than 50%) to obtain the better nodulizing effect. It can be applied on the important ductile iron castings of medium and small sections with high quality requirements.