Hi-density forming process
US5754937A · kind A · utility
17Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | May 15, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/0271
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for making a high density powdered metal article is provided. The composition consists of iron based powder, lubricant, graphite and ferro alloy additions. The composition is compacted in rigid tools at ambient temperature, sintered at high temperature and then formed in rigid tools at 40 to 90 tons per square inch to a density greater than 94% of theoretical. The high density article is then annealed. The final article demonstrates remarkable mechanical properties which are atypical of powdered metal components and approach those of wrought steel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.