等离子旋转电极制粉技术研究进展

Progress of plasma rotating electrode processing technology

等离子旋转电极制粉技术是当前生产高品质球形金属粉末的重要技术之一,通过电极高速旋转产生的离心力将液膜甩出形成液滴,在惰性气氛中雾化凝固成球形粉末。该技术制备的粉末已成为增材制造、热等静压、表面喷涂等制造技术的重要原料。本文回顾了国内外等离子旋转电极制粉技术的发展历史,综述了近年来国内外发展现状,特别是总结了等离子旋转电极装备和技术在中国的发展情况,指出了该技术尚需研究的科学技术问题和发展方向。

Plasma rotating electrode process(PREP)is one of the key technologies for producing high quality spherical metal powders.The liquid film is thrown out to form the droplets by the centrifugal force generated by the high-speed rotation of the electrode,which will atomize and solidify into the spherical powders in an inert atmosphere.The metal powders prepared by PREP have become the important raw materials for additive manufacturing,hot isostatic pressing,surface spraying,and other manufacturing technologies.The history and current status of PREP technology at home and abroad were reviewed in this paper,and the development situation of the PREP equipment and technology in China was summarized.Finally,the development trends and the main scientific issues were pointed out for the further research.