新型催化脱脂型喂料的流变性能研究  

RHEOLOGICAL CHARACTERISTICS OF METAL INJECTION MOLDING FEEDSTOCK USING NEWLY CATALYTIC DEBINDING BINDER

作　　者：郑礼清[1] 李笃信[1] 李昆[1] 赵莉[1] 蒋忠兵[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《粉末冶金工业》2008年第6期14-18,共5页Powder Metallurgy Industry

基　　金：中南大学研究生教育创新工程立项资助项目(1343-77335)

摘　　要：利用XNR-400熔体流速仪,研究了催化脱脂型粘结剂体系和17-4PH不锈钢粉末混合制备的喂料的流变性能。通过线性回归分析,计算出非牛顿指数和粘流活化能。结果表明:喂料的粘度随着温度的升高以及剪切速率的增大而减小,具有较好的充模性,呈假塑性流体。在三种组份的喂料中,F3喂料的综合流变性能最好,在185℃和500 s-1剪切速率条件下,其非牛顿指数n和粘流活化能E分别为0.26864和34.96785kJ·mol-1。By using XNR-400 melt flow index tester,the rheological characteristics of PIM feedstock of newly catalytic debinding binder and 17-4PH stainless steel powder were studied.The non-newton index and viscous flow activation energy were calculated by means of regression analysis.The results showed that all feedstocks were of pseudoplastic fluid for their viscosity was decreased with increase of temperature and shear speed.Of all feedstocks,the comprehensive rheological characteristics of feedstock F3 was the be...

关 键 词：粉末注射成形 催化脱脂型粘结剂 流变性能 XNR-400熔体流速仪 

分 类 号：TF124.39[冶金工程—粉末冶金]