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气雾化压力对3D打印用316L不锈钢粉末性能的影响
引用本文:吴文恒,吴凯琦,肖逸凡,杨启云.气雾化压力对3D打印用316L不锈钢粉末性能的影响[J].粉末冶金技术,2017,35(2).
作者姓名:吴文恒  吴凯琦  肖逸凡  杨启云
作者单位:上海材料研究所,上海200437 ;上海3D打印材料工程技术研究中心,上海200437
基金项目:上海市科学技术委员会应用技术开发专项资金资助项目
摘    要:采用真空熔炼气雾化工艺制备3D打印用316L不锈钢粉末,通过调整雾化参数,研究了不同雾化压力对粉末化学成分、粒度分布、球形度、表面形貌、流动性及松装密度等特性的影响。结果表明:在保温温度(1560±20)℃、保温时间20 min、漏包温度(1050±30)℃、高纯氮气雾化及雾化压力3.0 MPa工艺参数下,制备得到的粉末性能可达到氧含量(质量分数)0.08%、中位径31.39μm、球形度0.75、流动性21.56 g/(50 s)及松装密度3.88 g/cm~3,基本满足不同金属3D打印技术对粉末材料性能的要求。

关 键 词:不锈钢  气雾化  粉末性能  3D打印

Effect of atomization pressure on the properties of 316L stainless steel powders used in 3D printing
WU Wen-heng,WU Kai-qi,XIAO Yi-fan,YANG Qi-yun.Effect of atomization pressure on the properties of 316L stainless steel powders used in 3D printing[J].Powder Metallurgy Technology,2017,35(2).
Authors:WU Wen-heng  WU Kai-qi  XIAO Yi-fan  YANG Qi-yun
Abstract:316L stainless steel powders used in 3D printing were prepared by a vacuum inert gas atomization (VIGA) system in this paper.The effects of atomization pressure on the chemical composition,particle size distribution,sphericility,surface morphology,flowability,and apparent density of 316L stainless steel powders were investigated.The results show that under the certain process parameters (melting at (1560±20) ℃,holding for 20 min,tundish temperature at (1050±30) ℃,and N2 atomization at 3 MPa),the high quality 316L stainless steel powders can be obtained,which can be used for different 3D printing techniques.The characteristics of powders are summarized as the oxygen content of 0.08% by mass,the medium diameter (D50) of 31.39 μm,the sphericility of 0.75,the fluidity of 21.56 g/(50 s),and the loose packed density of 3.88 g/cm3.
Keywords:stainless steel  gas atomization  powder characteristics  3D printing
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