振动力场对金属粉末注射熔体流变性能及相分离的影响研究

动态注射成型是一种将振动力场引入到注射成型工艺上的新技术，本文介绍了动态注射成型技术在金属粉末注射成型中的应用情况，应用蜡基粘结剂与平均粒径为10um的气雾化316L不锈钢粉末按各种装载量进行配比，探讨了振动频率、振幅对喂料熔体流变性能及相分离的影响。结果表明，振动力场的引入能改善金属喂料的流动性能，增加金属喂料在阿基米德螺旋模具中充模过程的流程长度；振幅、频率的改变能改善制品相分离的情况，在频率为10Hz、振幅为0.1mm时对相分离的改善作用最为明显。

Effects of Vibration Force Field on Melt Rheological Properties and Phase Isolation During Metal-Powder Injection Molding

The dynamic injection molding is a technology which the electromagnetic vibration force field is introduced into the process of injection molding. The application of dynamic injection molding in the metal injection molding is introduced in this paper. Based on the wax-based binder for the gas-atomized spherical 316L stainless steel powders whose average particle size is 10um, different powder-loading feedstocks were prepared. The dynamic injection molding experiment result shows that the dynamic frequency and amplitude ameliorate the feedstock’s rheological property and lengthen the flow length in the Archimedes helical mold. The scanning electron microscope test result shows that the dynamic frequency and amplitude ameliorate the feedstocks phase-isolation. When the dynamic frequency f is10Hz and the amplitude A is 0.1mm, the affection is the best.