研究了熔体过热度对雾化制粉工艺过程的影响．结果表明，在限制式的喷嘴结构中，金属熔体的过热度对雾化过程能否顺利进行有着重要的作用．在较低的过热度（Δｔ＜１３０℃）时，熔体会在导液管中凝固或在导液管末端形成倒锥形的粘结块，致使熔体滞流或反喷；当过热度Δｔ＞１５０℃时，熔体的流动不再受过热度的影响，随着过热度的增加，粉末的球化程度增大，平均粒度减小． The effect of melt superheat on the process of atomization milling was studied. The results show that the superheat of the metal melt plays an important role in the atomization process in the restricted nozzle structure. At lower degrees of superheat (Δt <130 ° C), the melt solidifies in the catheter or forms an inverted conical block at the end of the catheter, causing the melt to stagnate or back-spray; when the degree of superheat When Δt> 150 ℃, the melt flow is no longer affected by superheat, with the increase of superheat, the powder increases the degree of spheroidization, the average particle size decreases.