摘要
研究了熔体过热度对雾化制粉工艺过程的影响．结果表明，在限制式的喷嘴结构中，金属熔体的过热度对雾化过程能否顺利进行有着重要的作用．在较低的过热度（Δｔ＜１３０℃）时，熔体会在导液管中凝固或在导液管末端形成倒锥形的粘结块，致使熔体滞流或反喷；当过热度Δｔ＞１５０℃时，熔体的流动不再受过热度的影响，随着过热度的增加，粉末的球化程度增大，平均粒度减小．
The influence of melt superheat on gas atomization process is studied in this paper. Results show that at lower superheat, melt will solidify in the guide tube or build up at the tube tip, which leads the melt upwards or fluid stop instead of atomization. Powders become finer as the melt superheat is increased,and shape becomes more spherical and smooth,when superheat is more than 150 ℃.
出处
《中南工业大学学报》
CSCD
北大核心
1997年第2期149-151,共3页
Journal of Central South University of Technology(Natural Science)
关键词
粉末冶金
雾化
过热度
熔体
powder metallurgy
atomization
superheat
melt
