摘要
首次提出并实现了一种基于电弧等离子体微爆技术(Plasma micro-blasting process,PMBP)的新型制粉方法。电弧等离子体微爆技术(简称电弧微爆)利用电弧等离子体作用于导电工件表面,使局部体积熔融并被微爆炸抛离形成细小球形颗粒。与现有的制粉方法相比,电弧微爆制粉技术具有生产效率高、原材料选择范围广、对工件形状无要求、生产的粉末球形度高、卫星球少等优异特性。实验采用铜电极加工典型的铜板,结果表明,通过调整电源的峰值电流、电极转速、进给速度等制粉参数,生产的球形颗粒粒径范围能控制在几微米到几百微米以内。在进给速度达到12 mm/s时,加工效率可达到1680 g/h。通过超景深和扫描电子显微镜对球形颗粒表面形貌特征的观察,以及通过流动性、松装密度和氧含量等检测,证明了新型方法生产的球形粉末在粉末冶金、喷涂和增材制造等领域中具有广阔的应用前景。
Anovel powder manufacturing method named Plasma Micro-Blasting Process(PMBP)is proposed and implemented in this paper.This technology makes use of the arc plasma generated by DC current power supply between a hollow tube electrode and electrically conductive material to melt the surface of the material and cause blasting to remove the spherical powder from the melt pool.Compared with conventional powder manufacturing methods,the PMBP process possesses many advantages such as high efficiency,low cost,free choice of the shape of the raw material.The powder manufactured by the PMBP typically has the shape of sphere with less content of satellite powder.In this study,copper bulk and copper tube are selected to be the anode and cathode separately.The powder with size distribution between several microns and hundreds of microns can be generated by adjusting the manufacturing parameters.The efficiency can reach 1680 g/h when the feed speed is up to 12 mm/s.The morphology of the powder has been observed and analyzed,followed by the flowability,apparent density and content of oxygen measurements.The feasibility of the PMBP in powder metallurgy even in additive manufacturing applications has been proven.
作者
伍芷凝
姚青
刘国盛
涂广俊
周振宇
丁明伟
徐辉
WU Zhining;YAO Qing;LIU Guosheng;TU Guangjun;ZHOU Zhenyu;DING Mingwei;XU Hui(Shenzhen Aerospace Technology&Innovation,Shenzhen 518000,China;Shenzhen Aerospace Technology New Material,Shenzhen 518000,China;Zhongkexin Engineering Consulting,Beijing 100039,China;Shenzhen Aerospace Industry Technology Research Institute,Shenzhen 518000,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第S02期386-389,共4页
Materials Reports
基金
深圳科创委(JSGG20191129093433336)。
关键词
电弧等离子体微爆制粉
球形粉末
粉末冶金
增材制造
效率
plasma micro-blasting process(PMBP)
spherical powder manufacturing
powder metallurgy
additive manufacturing
efficiency
