加圧流動による液状バインダ添加カーボニル鉄粉の簿肉カップ成形

概要

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Compaction was carried out by PPFM(Press Powder Flow Molding) from carbonyl iron powder granulated with a little resin binder(PVA), including lubricant(ZnSt) and some amount of liquid binder (Liquid Paraffin). The density of green compact increases according to the addition of ZnSt and Liquid Paraffin due to the increase of cup wall density, and it can be concluded that the powder flows out from cup bottom to wall due to the lubricating effect by ZnSt and Liquid Paraffin.<BR>The Liquid Paraffin volume in green compact by PPFM is about half of total binder volume, and so the debinding of green compact by PPFM is more easy by PIM(Powder Injection Molding). The difference in diameter at position of sintered compact performed under 294MPa from powder of the addition of 1wt% ZnSt and 4wt% Liquid Paraffin was a little enough and sintered compact was nearly uniform in density distribution.
社団法人粉体粉末冶金協会の論文