摘要：基于电极感应熔炼惰性气体雾化 (EIGA) 技术制备Ti-6Al-4V钛合金粉末, 采用激光粒度仪、扫描电镜 (SEM) 等测试分析手段研究熔炼功率对粉末粒径分布及形貌的影响规律。结果表明:在实验参数范围内, EIGA技术制备的Ti-6Al-4V钛合金粉末, 具有粒径细小、流动性好、松装密度大、球形度高等特点, 适用于3D打印技术;随着熔炼功率的增大, 粉末的中值粒径存在细化的趋势, 但当功率增大到33 kW时, 粉末中值粒径相对增大;球形度下降, 并且粉末中卫星球比例也明显增大。从粉末松装密度、流动性、球形度、粒度、形貌等综合因素考虑, 适合Ti-6Al-4V钛合金粉末制备的熔炼功率为30 kW。

关键词：电极感应熔炼；气雾化；Ti-6Al-4V 合金；球形度

Abstract：The Ti-6Al-4V alloy powder was prepared by elga (electrode induction melting gas atomization) process. The particle size distribution and surface morphology of Ti-6Al-4V powder were characterized by laser particle size analyzer and scanning electron microscopy (SEM) . The results show that the Ti-6Al-4V alloy powder prepared by EIGA, is fine and has less hollow ball defects and better sphericity on the basis of our experimental parameters, which is suitable for 3D printing. As the melting power increases, a D50 value of powder tends to be finer.When the melting power increases to 33 kW, the powder particles become coarser. What's more, the proportion of the satellites increases significantly. In consideration of the apparent density, flowability, sphericity, particle size, morphology and other factors, 30 kW is the suitable power value for Ti-6Al-4V alloy powders preparation.

Keywords：electrode induction melting；gas atomization；Ti-6Al-4V alloy；sphericity