PREP法制备钼合金粉末及性能表征  

Preparation and properties of spherical molybdenum alloy powders by plasma rotating electrode process

作　　者：李晓辉 凤治华 孙念光 杨星波 LI Xiaohui;FENG Zhihua;SUN Nianguang;YANG Xingbo(Xi’an Sailong Metal Materials Co.,Ltd,Xi’an 710016,China)

机构地区：[1]西安赛隆增材技术股份有限公司,陕西西安710016

出　　处：《粉末冶金工业》2024年第5期57-60,73,共5页Powder Metallurgy Industry

摘　　要：采用等离子旋转电极雾化技术(PREP)制备球形钼及TZM钼合金粉末,利用激光粒度分析仪、氧氮分析仪、扫描电子显微镜(SEM)对粉末的粒径分布、氧含量、微观形貌、表面组织进行表征。结果表明:两种粉末的氧增量均小于50×10^(-6),粉末粒度集中分布在45~150μm呈单峰分布;TZM合金粉末实测中位粒径81.6μm小于Mo粉中位粒径102μm,且表面质量高、工艺性能(流动性、松装、振实密度)更优,这与TZM合金具有更小的表面张力,同时晶界处析出的第二相TiC等有关。该实验为增材制造用PREP法制备难熔金属粉末提供理论支持。The spherical molybdenum and molybdenum alloy TZM powders were prepared by plasma rotary electrode atomization technology,and the particle size distribution,oxygen content,micromorphism and surface tissue of tungsten powder were characterized by laser particle size analyzer,O-N analyzer,scanning electron microscope(SEM).The results show that the oxygen increments of both powders are under 50×10^(-6),the powder particle size is concentrated in a single-peak distribution of 45-150μm.Because of the smaller surface tension of TZM,which has a smaller median particle size than Mo powder,and the powder has high surface quality and better process performance,which provides theoretical support for the evaluation of palladium and vanadium alloy powder for additive manufacturing.

关 键 词：等离子旋转电极 难熔金属 钼及钼合金粉 球形粉末 表面张力 

分 类 号：TF123.112[冶金工程—粉末冶金]