等离子球化制备W-Mo合金粉末及性能研究  

Research on the Preparation and Performance of W-Mo Alloy Powder by Plasma Spheroidization

作　　者：王燕飞 叶楠[2] 何翕 唐建成[2] 唐炜 毛杰 张帆 王玉香 WANG Yanfei;YE Nan;HE Xi;TANG Jiancheng;TANG Wei;MAO Jie;ZHANG Fan;WANG Yuxiang(Ganzhou Nonferrous Metallurgy Research Institute Co.,Ltd.,Ganzhou 341000,Jiangxi,China;International Institute for Materials Innovation,Nanchang University,Nanchang 330000,Jiangxi,China)

机构地区：[1]赣州有色冶金研究所有限公司,江西赣州341000 [2]南昌大学国际材料创新研究院,江西南昌330000

出　　处：《中国钨业》2024年第6期85-94,共10页China Tungsten Industry

基　　金：江钨控股集团科技计划项目(JXTC-23A-08)。

摘　　要：以不规则钨粉和钼粉为原料,采用喷雾造粒和真空脱脂预烧结制备出钨钼混合粉,经射频等离子技术制备出球形W-Mo合金粉末。深入研究了钨、钼粉末在不同阶段的形貌和物相变化,并分析了等离子球化过程中不同送粉速率对球形W-Mo合金粉末形貌和粒度的影响。结果表明:真空烧结可以强化W-Mo类球形喷雾料结构,有利于获得性能良好的球形W-Mo合金粉,其流动性和松装密度分别达到7.8 s/50 g、8.91 g/cm^(3);合适的送粉速率有利于在等离子球化过程中提升W-Mo合金粉末的表面质量,当送粉速率为70 g/min时,W-Mo合金粉末元素分布均匀,粒度分布集中在23~35μm,球形度高,表面光滑。This study developed spherical W-Mo alloy powders through a multi-stage process combining spray granulation,vacuum debinding,presintering,and radio-frequency plasma spheroidization,using irregular tungsten and molybdenum powders as raw materials.The morphological and phase evolution of W-Mo powders during processing stages was systematically investigated,with particular emphasis on analyzing the effects of powder feed rate during plasma treatment on final powder characteristics.Experimental results demonstrate that vacuum sintering effectively enhances the structural integrity of W-Mo composite spray granules,yielding optimized spherical alloy powders with superior flowability(7.8 s/50 g)and apparent density(8.91 g/cm^(3)).Controlled powder feeding during plasma spheroidization significantly influences surface quality and particle size distribution.At an optimal feed rate of 70 g/min,the resultant W-Mo alloy powders exhibit homogeneous elemental distribution,concentrated particle sizes(23-35μm),high sphericity(>95%),and smooth surfaces.This integrated approach establishes a robust technical foundation for manufacturing high-performance refractory alloy powders,demonstrating precise control over particulate morphology while maintaining compositional uniformity-critical requirements for advanced applications in additive manufacturing and powder metallurgy.The systematic investigation provides essential process parameter guidelines for scaling up plasma-based spheroidization of composite metal powders.

关 键 词：喷雾造粒 真空烧结 射频等离子 球形W-Mo合金粉 

分 类 号：TF125.241[冶金工程—粉末冶金]