喷雾干燥法制备钼合金微粉的研究  

Preparation of Molybdenum Alloy Micropowder via Spray Drying

作　　者：操齐高[1] 赵盘巢 戎万 易伟[3] Cao Qigao;Zhao Panchao;Rong Wan;Yi Wei(Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China;Kunming Institute of Precious Metals,Kunming 650000,China)

机构地区：[1]西北有色金属研究院电子材料研究所,陕西西安710016 [2]西北有色金属研究院,陕西西安710016 [3]昆明贵金属研究所,云南昆明650000

出　　处：《稀有金属材料与工程》2020年第10期3627-3632,共6页Rare Metal Materials and Engineering

基　　金：陕西省青年科技新星项目(2018KJXX-055);稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SPM-2018011)。

摘　　要：钼合金的制备广泛采用原料粉末混匀、坯料压制、烧结成型的粉末冶金方法,因此原料粉末的纯度、混合的均匀程度、粉末粒径和形貌对钼合金制品的性能有重要影响。本实验采用溶液喷雾干燥法制备前驱体粉末,再将前驱体粉末在氢气气氛下进行高温还原制备钼钨合金粉和钼钌镍复合粉,研究了喷雾干燥工艺参数(溶液浓度、进料速度、干燥温度等)和还原热处理工艺参数(还原气氛、温度、时间等)对钼合金微粉粒径、成分和形貌的影响,此外还分析了钼钨合金化和钼钌镍复合粉钎焊性能。结果表明,采用溶液喷雾干燥结合还原热处理工艺,可获得粒径0.5~3μm的球形钼钨固溶体合金粉和0.5~2μm的球形钼钌镍复合粉,且钼钌镍复合粉在钼板上钎焊时具有优异的润湿性。The powder metallurgy method of raw material powder mixing,billet pressing and sintering molding is widely used in the preparation of molybdenum alloys.Therefore,the purity,uniformity,powder size and morphology of the raw material powder have an important influence on the properties of the molybdenum alloy product.In this paper,the precursor powder was prepared by solution spray drying,and the precursor powder was reduced to molybdenum-tungsten alloy powder or molybdenum-ruthenium-nickel composite powder by high temperature reduction under hydrogen atmosphere.The effects of the spray drying process parameters(solution concentration,feed rate,drying temperature,etc.)and reduction heat treatment process parameters(reduction atmosphere,temperature,time,etc.)on the particle size,composition and morphology of molybdenum alloy micropowder were studied.Furthermore,the brazing property of molybdenum-ruthenium-nickel composite powder was analyzed.The result shows that spherical molybdenum-tungsten solid solution alloy powder with the particle size of 0.5~3μm and spherical molybdenum-ruthenium-nickel composite powder with the particle size of 0.5~2μm can be obtained by solution spray drying combined with reduction heat treatment.Molybdenum-ruthenium-nickel composite powder has excellent wettability when it is brazed on molybdenum plate.

关 键 词：钼合金 喷雾干燥 微米级 合金粉 

分 类 号：TG146.4+12[一般工业技术—材料科学与工程]