气雾化制备金属粉末的研究进展及展望

Research Progress and Prospect of Metal Powder Preparation by GasAtomization

金属粉末作为增材制造的关键原材料,其品质很大程度上决定了产品最终质量。气雾化制粉技术所制备的粉末具有粒度细小、球形度高、氧含量低等优点,已成为增材制造高性能金属构件的主要原材料。本文综述了气雾化制粉技术的基本原理与特点,总结了近年来气雾化制粉用喷嘴结构类型、气体流场结构与仿真模拟、粉末质量调控及工艺参数控制等方面的研究进展,并对气雾化制粉技术的发展前景进行了展望。

As a key raw material of powder metallurgy and additive manufacturing,the quality of the metal powder largely determines the final quality of the product.The powder prepared by gas atomization technology has the characteristics of fine particle size,good sphericity,low oxygen content.This technology has become the main method to prepare high quality metal powders for the additive manufacturing.In this paper,the principle of the gas atomization technology and the structure of nozzles were described,the research progress of this technology in gas flow structure,particle size control and the control of process parameters in recent years were summarized.The development prospects were discussed.