气雾化法制备3D打印用钴铬合金粉末工艺的研究  

Study on the preparation process of 3D printing CoCr alloy powder by gas atomization method

作　　者：罗浩 宗伟 李志 翁廷 朱杰 曾克里 

机构地区：[1]广东省材料与加工研究所,广东广州510650

出　　处：《材料研究与应用》2017年第3期182-186,191,共6页Materials Research and Application

基　　金：广东省工业高新技术领域科技计划项目(2013B010403019)

摘　　要：采用真空熔炼气雾化工艺制备3D打印用钴铬合金粉末,通过调整雾化工艺参数,研究了漏嘴直径、熔炼温度及雾化压力对粉末形貌、粒度分布、松装密度及流动性等特性的影响.结果表明:在熔炼温度为1670℃、雾化压力为5 MPa、漏嘴直径为5 mm的条件下,制备的合金粉末性能优异,平均粒径(D50)为30.70μm,松装密度为4.30g/cm^3,氧含量为0.032%,流动性为22.40s/(50g),可满足3D打印用钴铬金属粉末的性能要求.CoCr alloy powder used in 3D printing was prepared by vacuum inert gas atomization method in this paper. The influences of nozzle diameter, melting temperature and atomization pressure on the morphology, particle size distribution, and loose packed density of powder were investigated by adjusting the atomization process parameters by using the vacuum smelting gas atomization process. The results show that under the certain process parameters （melting at1670℃, argon gas pressure at 5 MPa, nozzle diameter at 5 mm）, the high quality CoCr alloy powder can be obtained, which can be used for different 3D printing techniques. The characteristics of powder are summarized as the mean diameter （D50） of 30.70 μm, the loose packed density of 4.30 g/cm^3, the oxygen content of 0. 032% , and the fluidity of 22.40 g/ （50 s）, to meet the 3D pringting cobalt chromium metal powder performance requirements.

关 键 词：气雾化 3D打印 CoCr合金 粉末性能 

分 类 号：TF123[冶金工程—粉末冶金]