【摘要】 提出了新型低成本球形钛粉气雾化制备技术——高频感应熔化金属丝气体雾化技术(Wire induction heating-gas atomization,WIGA),研究了雾化气体压力、熔体温度、送料速度对粉末性能的影响。结果表明:所制钛粉末的形貌为球形,球形度较高,粉末表面存在少量"卫星球"颗粒,占比约为1%;提高雾化压力、熔体温度和降低送丝速度均使粉末平均粒径D50减小。实验所得最佳雾化参数为:雾化气体压力4.0 MPa,熔体温度2 000℃,送料速度0.8m/min,在此条件下得到的钛粉末平均粒径为41.8μm。更多还原

【Abstract】 A novel low-cost spherical titanium powder process,wire induction heating-gas atomization(WIGA),was proposed in the present work.The effects of the gas pressure,metal temperature and the feeding speed on the particle size of the titanium powder were studied.The results indicated that the powders were spherical with rare satellite particles on the surface,the satellite particles accounted for one percent.The average particle size of powders decreased and the producing efficiency of fine size powders increased with the increase of gas atomization pressure,melt temperature,or with the decrease of feeding speed.The optimum parameters were gas pressure of 4.0 MPa,metal melt temperature of 2 000 ℃ and wire-feed speed of 0.8 m/min.Under the optimized condition,the average particle size of titanium powder was 41.8 micrometers,powder morphology was spherical,and "satellite"powders rarely existed on the surface of particles.更多还原