Gear wheels rolled from powder metal blanks and method of manufacture
US5711187A · kind A · utility
31Cited by
12References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1995 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Jan 3, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19963
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A gear wheel is formed from a pressed and sintered powder metal blank in which the metal powder comprises an admixture of iron powder and at least one alloying addition and the gear wheel is surface hardened by densifying at least the tooth root and flank regions to establish densification in the range of 90 to 100 percent of full theoretical density to a depth of at least 380 and up to about 1,000 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.