球铁生产目前以镁或镁合金作球化剂,但我国镁的产量较少,而稀土资源却极为丰富;如能用稀土作球化剂,无疑在经济上有很大的意义。我们采用喷吹技术,用稀土硅铁粉处理铁水,球化效果很好。喷吹法不仅可以使高硫铁水(S>0.10%)得到良好的球化,而且可以使球化孕育一次完成。试样的铸态机械性能可达 QT42-1和和QT50-5的水平。 At present, the production of ductile iron is a nodulizer for magnesium or magnesium alloy, but the output of magnesium in our country is less, while the rare earth resources are extremely rich. If rare earth can be used as nodulizer, it is doubtless economically significant. We use injection technology, with rare earth ferrosilicon powder treatment, the ball effect is very good. Injection method can not only make high-sulfur molten iron (S> 0.10%) get a good spheroidization, and can make the spheroidization in one done. The as-cast mechanical properties of the specimens are up to the levels of QT42-1 and QT50-5.