摘要：采用自行研制的等离子设备实现钼粉颗粒的球形化,研究工艺参数对钼粉颗粒球形化的影响,采用电子扫描显微镜、霍耳流速仪和斯科特容量计观测球形钼粉的微观形貌,检测其流速和松装密度。结果表明,等离子体处理后钼粉颗粒的形状由不规则变为球形,钼粉流动性显著提高,松装密度增大;当输入功率为25 kW,送粉量为50 g/min时,钼粉颗粒的球形化最理想。

关键词：等离子体；球形化；钼粉

Abstract：Spheroidization of molybdenum particles was realized by the plasma equipment.The influences of technical parameters on spheroidization of molybdenum particles were studied.The morphology of molybdenum particles was observed by scanning electron microscopy.The flow rate and apparent density of molybdenum powders were investigated by Hall flow meter and Scott volumeter.The results show that spherical molybdenum particles can be obtained from irregular particles.Both of the flow rate and apparent density of molybdenum powders are enhanced.When the input power is 25 kW and the feed rate is 50 g/min,the best efficiency of the spheroidization is gained.

Keywords：plasma;spheroidization;molybdenum powders