We added the La—Ce oxide into the liquid iron treated with the Mg—Si nodulizer and then, made the simulated experiment i在Mg-Si球化剂处理的铁水中加人La-Ce氧化物。 然后在SG -8- 型保温炉中按大断面铸件凝固条件进行模拟性抗衰退保温试验。