本文讨论了稀土元素用于改善铸造镍基耐蚀合金性能的可能性和效果。试验结果 表明，往镍基耐蚀合金中添加适量的稀土能明显地细化合金的晶粒，改善碳化物的形 态和分布，阻止碳化物的集聚，使夹杂物含量减少．改变夹杂物形态，使其细化．球 化和呈弥散分布，其结果是提高了耐蚀性能，而且还提高了强度和改善了切削加工性 能。 This article discusses the possibility and effect of rare earth elements used to improve the performance of cast nickel-based corrosion resistant alloys. The experimental results show that adding appropriate amount of rare earth into the nickel-based corrosion resistant alloy can obviously refine the grain size of the alloy, improve the morphology and distribution of the carbide, prevent the agglomeration of the carbide and reduce the content of the inclusions. Change the inclusion shape, make it thinner. Spheroidization and dispersion, the result is to improve the corrosion resistance, but also improve the strength and improve the machinability.