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在铁镍部分代钴的基础上，采用常规硬质合金生产工艺，用不同含量的混合稀土作为添加剂进行了实验。结果表明，添加稀土可使合金硬度有较为明显的提高；对抗弯强度也有一定的影响，当稀土添加量为0．2％时，合金抗弯强度提高达5．8％左右；此外，加入稀土后，合金的耐磨性亦有所增强。断口扫描及能谱分析发现，WC／粘结相界面有球状稀土析出物存在，并富集较多杂质；X衍射分析显示稀土的添加可改变粘结相中γ－Fe／Co／Ni和α－Fe／Co／Ni的相对数量。文章依据实验结果对稀土影响WC－Fe／Co／Ni合金的原因进行了初步探讨。
On the basis of partial substitution of cobalt and iron in nickel-iron, the conventional cemented carbide production process was used, and the mixed rare-earth with different content was used as additive. The results show that the addition of rare earth can increase the hardness of the alloy obviously, and also have some influence on the flexural strength. The flexural strength of the alloy increases about 5.8% when the addition of rare earth is 0.2%. In addition, Rare earth, the wear resistance of the alloy has also been enhanced. Fracture scanning and energy spectrum analysis showed that spherical rare earth precipitates exist on WC / binder phase interface and more impurities are enriched. X-ray diffraction analysis shows that the addition of rare earth can change the γ-Fe / Co / Ni and α The relative amount of Fe / Co / Ni. Based on the experimental results of the article on the rare earth impact of WC-Fe / Co / Ni alloy were discussed.