Forged carburized powder metal part and method
US7718116B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2006 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Aug 4, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for obtaining a selectively non-carburized powdered metal part. The steps include compacting, sintering, removing, forging and cooling. A metal powder is compacted to form a preform having at least one first surface in which a forged part is required to have a case depth and at least one second surface in which a carburized portion is required to be removed prior to forging. The preform is then sintered and carburized. After carburizing the at least one second surface of the preform is removed and subsequently forged and cooled. The forged part has at least one second surface having improved post forging properties and at least one first surface having improved performance features. A part made from the present method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.