Rheologic behavior and PIM processing of WC-TiC-Co powder feedstock  

作　　者：XuanhuiQu JianxiangGao MingliQin ChangmingLei 

机构地区：[1]BeijingKeyLaboratoryforAdvancedPowderMetallurgyandParticulateMaterials,UniversityofScienceandTechnologyBeijing,Beijing100083,China [2]StateKeyLaboratoryforPowderMetallurgy,CentralSouthUniversity,Changsha,410083,China

出　　处：《Journal of University of Science and Technology Beijing》2004年第4期334-337,共4页北京科技大学学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China (No.50025412, 50274014), National 863 Program (No.2001AA337050) and National 973 Program (No.TG200067203)

摘　　要：An improved wax-based binder was developed for the powder injection molding(PIM) of WC-TiC-Co cemented carbides. The critical powder loading and the rheologic behavior of thefeedstock were determined. It was found that the critical powder loading could achieve up to 62.5percent (volume fraction) and the feedstock exhibited a pseudo-plastic flow behavior. The injectionmolding, debinding and sintering processes were studied. The dimension deviation of the sinteredsamples could be controlled in the range of + -0.2 percent with the optimized processing parametersand the mechanical properties were better than or equivalent to those of the same alloy made byconventional press-sintering process.An improved wax-based binder was developed for the powder injection molding(PIM) of WC-TiC-Co cemented carbides. The critical powder loading and the rheologic behavior of thefeedstock were determined. It was found that the critical powder loading could achieve up to 62.5percent (volume fraction) and the feedstock exhibited a pseudo-plastic flow behavior. The injectionmolding, debinding and sintering processes were studied. The dimension deviation of the sinteredsamples could be controlled in the range of + -0.2 percent with the optimized processing parametersand the mechanical properties were better than or equivalent to those of the same alloy made byconventional press-sintering process.

关 键 词：powder injection molding (PIM) cemented carbides BINDER RHEOLOGY mechanical properties 

分 类 号：TF124.5[冶金工程—粉末冶金]