粘结剂与粉末特性对金属注射成形喂料性能影响的研究进展  

Research progress on the effects of binder and powder characteristic on the feeding properties of metal injection molding

作　　者：罗来马[1,2,3] 阮方杰 叶伟 黄竹品 昝祥 吴玉程[1,2,3] LUO Laima;RUAN Fangjie;YE Wei;HUANG Zhupin;ZAN Xiang;WU Yucheng(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology,Hefei 230009,China;Engineering Research Center of High Performance Copper Alloy Materials and Processing,Ministry of Education,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]有色金属与加工技术国家地方联合工程研究中心,合肥230009 [3]教育部铜合金及成形加工工程研究中心,合肥230009

出　　处：《粉末冶金技术》2025年第1期1-11,共11页Powder Metallurgy Technology

基　　金：国家重点研发磁约束聚变能发展专项(2019YFE03120002,2022YFE03030003);安徽省自然基金面上项目(2208085ME122)。

摘　　要：在金属注射成形工艺中,金属粉末需要和粘结剂充分混合得到喂料后进行注射、脱脂和烧结。喂料中的粉末特性和粘结剂是金属注射成形的核心,对喂料的流变性能和粉末装载量有很大影响,进而影响注射、脱脂和烧结环节,是金属注射成形的研究热点。本文以粘结剂组分优化、金属粉末改性和喂料性能提升为出发点,阐述了粘结剂各组分的作用以及粘结剂中添加剂、金属粉末形状、粉末粒径、粉末表面改性对于喂料流变性能和粉末装载量的影响。为改善喂料性能所添加的添加剂包括增塑剂、稳定剂、表面活性剂等。添加剂的加入、粒度分布与形状的优化以及粉末表面改性可以使喂料的粘度、流变参数等流变性能以及粉末临界装载量得到明显改善。In the metal injection molding process,the metal powders need to be fully mixed with the binders to get the feeds before injection,degreasing,and sintering.The powder characteristic and binders of the feeds are the core of the metal injection molding,which have the great impact on the rheological properties and powder loading capacity of the feeds,and then affect the injection,degreasing,and sintering.Based on the optimization of binder components,the metal powder modification,and the improvement of feeding performance,the effects of binder components,additives in binders,powder shape,powder particle size,and surface modification on the rheological properties and loading capacity of the feeds were described.The additives in binders were added to improve the feed performance,including plasticizers,stabilizers,and surfactants.The addition of additives,the optimization of particle size distribution and shape,and the surface modification of the powders could significantly improve the rheological properties of the feeds,such as feed viscosity,rheological parameters,and the critical loading capacity of the powders.

关 键 词：金属注射成形 粘结剂 表面改性 流变性能 粉末装载量 

分 类 号：TF123[冶金工程—粉末冶金]