采用变转速多次循环高能球磨工艺在32 min制备出了平均晶粒尺寸约为25 nm的纳米WC-10Co-0.8VC-0.2Cr3C2 (重量分数)复合粉末, 并用化学元素分析、 XRD, TEM, DTA对纳米WC-Co复合粉末的特性进行了表征和分析. 结果表明, 变转速多次循环高能球磨工艺制备的纳米WC-Co复合粉末, 化学成分合格, 杂质含量低, 球磨效率高; 球磨过程是一个晶粒逐渐细化的过程, 同时也是一个晶格畸变逐渐增加、粉末体系能量逐渐增大的过程; 球磨得到的WC-Co纳米复合粉末颗粒形貌基本为球形, 粒径分布较宽, 颗粒中存在着一些团聚体, 平均颗粒尺寸约为50 nm; 纳米WC-10Co-0.8VC-0.2Cr3C2(wt%)复合粉末的共晶点约为1280 ℃. 纳米复合粉末中W, Co, V, Cr元素分布均匀弥散.
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