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为了提高ＷＣ硬质合金颗粒复合材料的耐磨性，向复合材料的金属基体中加入了不同数量的稀土。采用扫描电镜、Ｘ射线能谱仪、显微硬度计、台式冲击试验机以及销盘式磨损试验机等试验手段，对稀土加入量不同的几种ＷＣ硬质合金颗粒复合材料的金属基体进行了稀土分布及显微组织的分析，测定了基体组织的显微硬度及复合材料的韧性和耐磨性。研究结果表明，稀土富集于奥氏体与碳化物和奥氏体与共晶体两种界面处，少量固溶于奥氏体中。加入适量的稀土产生了明显的微合金化作用，使共晶组织显著细化，提高了金属基体的硬度和韧性以及复合材料的耐磨性。
In order to improve the wear resistance of the WC cemented carbide composite, different amounts of rare earths were added to the composite metal matrix. The metal matrixes of several WC cemented carbide composite materials with different rare earth additions were investigated by scanning electron microscopy, X-ray energy dispersive spectroscopy, microhardness tester, bench impact tester and pin-plate wear tester. REE distribution and microstructure analysis, the microhardness of the matrix and the toughness and wear resistance of the composites were measured. The results show that rare earth is enriched in two interfaces of austenite and carbide, austenite and eutectic, and a small amount of solid solution in austenite. Addition of proper amount of rare earth has obvious microalloying effect, remarkably refining the eutectic structure, improving the hardness and toughness of the metal matrix and the wear resistance of the composite.