真空气雾化金属粉末“卫星球”形成机理的研究  

Vacuum gas atomized metal powder “satellite” forming mechanism

作　　者：陈珊珊 曾克里 宋信强 朱杰 CHEN Shanshan;ZENG Keli;SONG Xinqiang;ZHU Jie(Guangdong Institute of Materials and Processing,Guangzhou 510650,China)

机构地区：[1]广东省材料与加工研究所

出　　处：《材料研究与应用》2019年第1期44-47,共4页Materials Research and Application

摘　　要：为了有效地控制真空气雾化金属粉末“卫星球”的形成概率,对真空气雾化过程中雾化率以及雾化室压力对粉末性能的影响进行了研究,并分析了“卫星球”的形成机理.结果表明,在其他雾化参数相同时,雾化率从8.5kg/min减少到6.0kg/min时,粉末的Hall流速从18.2s/50g减小到16.85s/50g,松装密度从3.64g/cm^3增加到3.85g/cm^3;雾化室压力从8kPa降到-3kPa以下,粉末的Hall流速从16.85s/50g减小到14.52s/50g;松装密度从3.85g/cm^3增加到4.21g/cm^3.通过减小雾化率和雾化室压力,可以有效地减少卫星球的形成概率,提高粉末的性能.当雾化室压力低于标准大气压时,粉末表面光滑,无明显卫星球存在.In order to effectively control the content of VIGA metal powder“satellite”,the effect of atomizing rate and atomizing chamber pressure on the properties of the powder were studied and the“satellite”formation mechanism was also analyzed.The results show that when the atomization rate is reduced from 8.5 kg/min to 6.0 kg/min,the hall flow rate of the powder is reduced from 18.2 s/50 g to 16.85 s/50g,and the apparent density is increased from 3.64 g/cm^3 to 3.85 g/cm^3.When the spray chamber pressure is reduced from 8 kPa to below 3 kPa,the hall flow rate of the powder is reduced from 16.85 s/50g to 14.52 s/50g,and the apparent density is increased from 3.85 g/cm^3 to 4.21 g/cm^3.Therefore,reducing the rate and atomizing chamber pressure can effectively reduce the proportion of satellite and improve the powder properties.When the atomizing chamber pressure is lower than standard atmospheric pressure,the powder surface is smooth,and no obvious satellites are present.

关 键 词：真空气雾化 雾化率 雾化室压力 卫星球 

分 类 号：TG441.2[金属学及工艺—焊接]