一种窄粒度分布球形钨粉制备方法,本发明属于粉末冶金制备领域,提供一种窄粒度分布球形钨粉制备方法。通过对商购团聚严重钨粉(3-20μm)的分散、分级与等离子球化处理相结合,制备出窄粒度分布的球形钨粉。具体工艺是：将高度团聚、形状不规则、粒度分布宽的原料钨粉通过气流磨实现完全分散及有效分级,然后将处理后的钨粉通过射频等离子炬实现钨粉的球化处理,得到球形钨粉。本发明的优点是：将气流磨分散、分级处理与射频等离子球化相结合,解决了单一采用射频等离子球化得到的球形钨粉因团聚而聚集长大、细粉气化消失、粒度分布宽及工艺难以控制的问题,得到的粉末球形度好,粒度分布窄,球化率高,表面光滑,收得率高。

A method for preparing spherical tungsten powder with narrow particle size distribution belongs to the field of powder metallurgy preparation and provides a method for preparing spherical tungsten powder with narrow particle size distribution. By combining the dispersion and classification of commercially available tungsten powder (3-20μm) with severe agglomeration and plasma spheroidization, spherical tungsten powder with narrow particle size distribution is prepared. The specific process is: the raw tungsten powder with high agglomeration, irregular shape and wide particle size distribution is completely dispersed and effectively classified by jet milling, and then the treated tungsten powder is passed through a radio frequency plasma torch to achieve spheroidization of the tungsten powder to obtain a spherical shape. Tungsten powder. The advantages of the present invention are: the combination of jet mill dispersion, classification treatment and radio frequency plasma spheroidization solves the problem that the spherical tungsten powder obtained by radio frequency plasma spheroidization is agglomerated and grows, fine powder vaporizes and disappears, and the particle size distribution is wide. And the problem that the process is difficult to control, the obtained powder has good sphericity, narrow particle size distribution, high spheroidization rate, smooth surface and high yield.