Method for producing powder metal gears
US6630101B2 · kind B2 · utility
8Cited by
6References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2001 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Aug 16, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing a gear from a metallurgical powder includes molding at least a portion of the powder to provide a gear preform. The gear preform is sintered and hot formed, and subsequently may be carburized. The gear preform is resintered and cooled at a cooling rate suitable to provide a bainitic microstructure in at least a surface region of the preform. The gear teeth of the preform may be shaved to, for example, adjust dimensions, and enhance dimensional uniformity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.