粘结剂配比对316L不锈钢粉末注射成形喂料流变行为的影响  

Effect of Binder Ratio on Rheological Behavior of Feeding in Powder Injection Molding of 316L Stainless Steel

作　　者：乔斌[1,2] 董炎锋 胡建斌 张奕 付杰[3] 冯立超[1,2] 贺毅强[1,2] 尚峰[1] 李化强[1] 

机构地区：[1]淮海工学院机械工程学院,江苏连云港222005 [2]江苏省海洋资源开发研究院,江苏连云港222005 [3]中国矿业大学机电工程学院,江苏徐州221116 [4]连云港东睦新材料有限公司,江苏连云港222005

出　　处：《热加工工艺》2015年第14期70-73,共4页Hot Working Technology

基　　金：江苏省"六大人才高峰"第十批高层次人才资助项目(2013-HYZB-003);连云港市科技发展计划(工业)项目(CG1204);江苏省海洋资源开发研究院科技开放基金(HK13005)

摘　　要：制备了58%粉末装载量、不同粘结剂配比的316L不锈钢粉末注射成形喂料,对比了各粘度模型的应用范围。采用Second Order模型回归了喂料的各项流变参数,分析了剪切速率和温度对喂料粘度的影响。结果表明,Second Order模型适合用于描述实验喂料的流变行为,剪切速率和温度对喂料粘度的影响规律:粘度随剪切速率和温度的升高而降低。该粘结剂体系的最佳配比为65%石蜡、30%低密度聚乙烯及5%硬脂酸,考虑了剪切速率和温度对粘度的影响,其流变行为公式为lnγ=2.1335-0.9717lnγ+0.107T-0.0511(lnγ)2+0.0066T lnγ-0.0005T2。The feeding with 58% powder loading and different binder ratio was prepared for 316 L stainless steel powder injection molding. The application ranges of the viscosity models was compared. The rheological parameters of the feedstock were regressed by second-order mold flow model. The influence rules of shear rate and temperature on viscosity were analyzed. The results show that the second order model is suitable to describe the rheological behavior of the experimental feeding. The viscosity of feeding decreases with shear rate and temperature increasing. The optimal ratio of the binder system is composed of 65% PW, 30% LDPE and 5% SA. Considering the effect of shear rate and temperature on the viscosity, the formula of rheological behavior is as follows：lnγ=2.1335-0.9717lnγ＋0.107T-0.0511（lnγ）2＋0.0066 T lnγ-0.0005T2.

关 键 词：注射成形 流变 粘度 粘结剂 

分 类 号：TF124[冶金工程—粉末冶金]