金属粉末增塑成形用聚甲醛基黏结剂发展现状及改性研究进展  

Progress of polyoxymethylene-based binder for metal powder plastic shaping

作　　者：陈梦熊 熊慧文 邹恒 欧阳德才 张雷 周科朝[1] CHEN Mengxiong;XIONG Huiwen;ZOU Heng;OUYANG Decai;ZHANG Lei;ZHOU Kechao(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]中南大学粉末冶金研究院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2024年第8期3032-3046,共15页Journal of Central South University:Science and Technology

基　　金：国家重点研发计划项目(2021YFB3701900)。

摘　　要：金属粉末增塑成形结合了有机黏结剂的增塑流动特性,辅助混合喂料可快速成形复杂坯件,是不锈钢、合金钢及钛、镍、钨等有色金属及其复合材料的重要近净成形方法。新型聚甲醛(POM)基黏结剂因具有高的成形坯件强度、优异的脱脂保形性、高效率、低碳残留等优点,已成为金属粉末注射成型的主流黏结剂体系,是极具发展潜力的粉末增塑成形用黏结剂。本文总结近年来粉体增塑成形的技术进展,概述POM基黏结剂的物理特性与粉末注射成型用组分设计,探究POM基黏结剂的流变性能及其影响因素,分析催化脱脂的工艺反应过程与关键因素,综述POM基黏结剂在有色金属构件中的典型应用,并展望POM基黏结剂存在的问题与未来研究方向,为推动POM基黏结剂在粉体增塑成形中的应用提供参考。Powder metal plastic shaping,which combines the plastic flow characteristics of organic binders,enables the rapid formation of complex components and has emerged as a crucial near-net shaping method for stainless steel,alloy steel,as well as non-ferrous metals such as titanium,nickel,and tungsten,and their composites.The novel polyoxymethylene(POM)-based binders have gained prominence as the mainstream binder system in metal powder injection molding due to their high strength,excellent debinding shape retention,efficiency,and low carbon residue.As a result,they have become highly promising binders for powder metal plastic forming.The recent technological advancements in powder metal plastic forming were summarized.The physical properties and component design for powder injection molding using POM-based binders were overviewed.The rheological behavior and influencing factors of POM-based binders were investigated.The catalytic debinding process and key factors were analyzed,and a comprehensive summary of the typical applications of POM-based binders in non-ferrous metal components were presented.Furthermore,the challenges and future research directions for POM-based binders were discussed,aiming to provide valuable insights for promoting their application in powder metal plastic forming.

关 键 词：粉末增塑成形 聚甲醛(POM) 金属注射成型 黏结剂 催化脱脂 

分 类 号：TB44[一般工业技术]