분말 제조변수의 조절에 의한 가스 분무 조업의 최적화

The optimized condition for preventing metal delivery tube from freezing up during atomization was evaluated by analyzing the experimental data of gas atomizations which were carried out on various conditions. The optimum condition was established by controlling the protrusion length and the temperature of metal delivery tube. It was observed that powder shape is affected by the collision of particles. The probability of collision among particles can be controlled by changing atomization variables such as protrusion length of metal delivery tube, nozzle slit size and the condition of atomizing chamber. So it is possible to control the powder shape by changing the atomizing variables. It was also shown that the average particle size decrease with increasing atomizing pressure.