离心雾化制备SAC305球形粉工艺研究  

Study on the Preparation of SAC305 Spherical Powder by Centrifugal Atomization

作　　者：陇赞 白海龙[1,2] 陈东东 段雪霖[2] 严继康 易健宏 Long Zan;Bai Hailong;Chen Dongdong;Duan Xuelin;Yan Jikang;Yi Jianhong(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Tin Industry Tin Material Co.,Ltd,Kunming 650217,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]云南锡业锡材有限公司,云南昆明650217

出　　处：《稀有金属材料与工程》2021年第9期3313-3319,共7页Rare Metal Materials and Engineering

基　　金：云南省重大科技专项(2018ZE004)。

摘　　要：为生产高质量的SAC305合金球形粉末,研究了转速、处理量、雾化器形状、气氛含氧量等工艺参数对旋转离心雾化生产Sn-3.0Ag-0.5Cu粉末性能的影响。结果表明,随着转速(6000~60000 r/min)的提高、进料速度(30~60 kg·h-1)的降低和雾化器尺寸(30~50 mm)的增大,SAC305粉末平均粒径变小,计算流体力学(computational fluid dynamics,CFD)模拟与实验有一致的趋势,实验修正因子n为1.65,CFD模拟修正因子为2.23。杯形雾化盘相比平面雾化盘生产的粉末平均粒径降低了8%。SEM照片显示,随着雾化室氧含量的降低,粉末球形度提高,雾化室中的含氧量低于400μL·L-1时,粉末表面含氧量低于100μg·g^(-1)。SAC305粉末粒径和球形度主要受工艺控制,粉体表面质量与冷却效率和收集技术有关。In order to produce high-quality SAC305 alloy spherical powder,the effects of process parameters such as rotating speed,melt feed rate,shape and size of atomizer,and oxygen content in the atomizer chamber on the performance of Sn-3.0Ag-0.5Cu powder were studied by rotary centrifugal atomization.The results show that the median size of the atomized powders becomes smaller with the increase of the rotating speed(6000~60000 r/min),the decrease of the melt feed rate(30~60 kg/h),and the increase of the atomizer size(30~50 mm).The experiment value of n is 1.65,and the CFD value of n is 2.23.The average particle size of the powder produced by the cup-shaped atomization disk is reduced by 8%compared with the flat atomization disk.SEM results reveal that with the decrease of the oxygen content in the atomization chamber,the sphericity of the powder increases.When the oxygen content in the atomization chamber is less than 400μL·L-1,the oxygen content on the powder surface is less than 100μg·g^(-1).The particle size and sphericity of the SAC305 powder are controlled by the process,and surface quality of the powder is related to the cooling efficiency and collection technology.

关 键 词：离心雾化 Sn-3.0Ag-0.5Cu 焊锡粉 CFD 

分 类 号：TF123.24[冶金工程—粉末冶金]