| 摘要 |
PURPOSE:To facilitate degrease of a powder green compact and to easily manufacture a powder metallurgical product of complicate shape by using the specific organic macromolecular binder at the time of manufacturing the sintered product by the powder metallurgical method by using a metal or a ceramic powder as the raw material. CONSTITUTION:The binder is composed of a first organic macromolecule of at least one kind of polyethylene and ethylene-vinyl acetate copolymer so as to contain >=20wt.% of the green compact of binder and further, a second organic macromolecule except the first organic macromolecule is contained in the above binder and is the macro molecule of <=250 deg.C ceiling temp. The binder is mingled and kneaded with the metal or ceramic powder and the mingled material obtd. is formed to the green compact by injection compacting or extruding compacting, etc. After that, the compact is heated at <=280 deg.C heating temp. and the binder is thermal-decomposed and evaporated to manufacture the degreased body with the binder remained in the green compact. After that, this degreased body is sintered to make the sintered product. |
