Method of forming a powder compact

Details Method of forming a powder compact Method of forming a powder compact

2006-08-01

2006-08-01

Mai, Ngoclan (Department: 1742)

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Powder pretreatment

C419S066000

Reexamination Certificate

active

07083760

ABSTRACT:
This invention provides a method of forming a powder compact which can produce a high density compact under a high pressure and at the same time can reduce pressure for ejecting the compact from a die.This method comprises the application step of applying a higher fatty acid lubricant to an inner surface of a heated die, and the compaction step of filling metal powder into the die and compacting the metal powder under such a pressure as to force the higher fatty acid lubricant to be chemically bonded with the metal powder and form a metallic soap coating. Since the metallic soap coating is formed between the die and a compact, friction force between the die and the compact is decreased and ejecting pressure can be remarkably decreased despite of compaction with high pressure. Besides, a high density compact can be obtained owing to the compaction with high pressure.

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