新型PEG基粘结剂的开发

研究了一种新型PEG基粘结剂,新型PEG基粘结剂由HDPE,PEC,聚合物W,SA,DOP等组成,各组元之间具有一定的相互作用,使粘结剂体系具有较好的部分相容性,新型PEG基粘结剂与Fe-2Ni粉具有较强的相互作用,混合均匀性好,且粉末装载量高,喂料注射成形性好,用新型PEG基粘结剂和Fe-2Ni粉所制备的喂料具有良好的流变性能,是一种假塑性流体,粘结剂各组元用量及粉末装载量影响喂料流变性能,新型PEG基粘结剂用乙醇溶剂脱脂,速度快、缺陷少、维形能力强,且可避免环境污染问题。

A novel PEG-based binder system for metal injection molding

Binder system development is critical to the success of metal injection molding (MIM), A novel PEG-based binder for MIM was studied in this paper. The novel binder system was made of high density polyethlene (HDPE), polyethylene glycol (PEG), polymer W, stearie acid (SA) and dioctyl phthalate (DOP). There was the interaction between components of binder and the binder had good compatibility. The binder had a strong adhesive to Fe-2Ni powder and a high solid loading, and the binder and powder could be mixed easily to obtain a homogeneous feedstock. The feedstocks exhibited good molding behavior. The feedstocks possesses pseudo plasticity and exhibited good rheological properties. The binder could easily be removed in a short time in ethanol without defects and evironmental concern associated with other solvents are avoided. Large pore are formed of the debeund part during debinding, allowing escope of pyrolysis gases during subsequent tthermal debinding or presintering.