Method of forming a powder compact
US7083760B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 13, 2001 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Jul 19, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2003/145
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.