利用感应等离子体技术制备出高纯致密球形钼粉,实现了钼粉的球化、致密化、细化和纯化,同时研究了感应等离子体功率和原料粉粒度对球化率的影响。采用扫描电子显微镜、X射线衍射仪和激光粒度分析仪对球化处理前后粉末的形貌、物相和粒度分布进行测试和分析。结果表明,形状不规则的原料钼粉,经等离子体球化处理后得到球形度好、表面光滑、分散性良好、球化率几乎可达100%的球形钼粉。球化处理后,钼粉粒度变细,且粒度分布更集中。相同工艺条件下,随着等离子体功率的增加,钼粉的球化率先增大后降低,当等离子体功率为25 kW时钼粉球化效果最好,粒度较小的钼粉球化率较高。随着钼粉球化率的提高,粉末的流动性得到显著改善,松装密度也得到提高。钼粉末的流动性由40 s/50 g提高为11 s/50 g,松装密度由2.3 g/cm~3提高到6.1 g/cm~3。 High purity densified spherical molybdenum powder was prepared by the induction plasma technique. The ballization, densification, refinement and purification of the molybdenum powder were realized. At the same time, the influence of the power of the induction plasma and the particle size of the raw material on the spheroidization rate was studied. The morphology, phase and particle size distribution of the powders before and after spheroidization were tested and analyzed by scanning electron microscopy, X-ray diffraction and laser particle size analyzer. The results showed that spherical molybdenum powder with irregular shape was obtained by plasma spheroidization. The spheroidal molybdenum powder with good sphericity, smooth surface, good dispersibility and spheroidization rate of almost 100% was obtained. Ball treatment, the molybdenum powder particle size becomes thinner, and the particle size distribution is more concentrated. With the increase of plasma power, the spheroidization rate of molybdenum powder first increases and then decreases. Under the same process conditions, the spheroidization effect of molybdenum powder is the best when the plasma power is 25 kW. high. With the molybdenum powder ball rate increased, the powder fluidity has been significantly improved, loose density has also been improved. The flowability of molybdenum powder increased from 40 s / 50 g to 11 s / 50 g, and the bulk density increased from 2.3 g / cm ~ 3 to 6.1 g / cm ~ 3.