Surface treated cast iron bearing element
US5468308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1994 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Aug 22, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2220/70
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A bearing blank is cast or machined of cast iron to a configuration near a final shape of a desired bearing element. A first surface of the bearing blank, corresponding to a sliding surface of the desired bearing element, is remelted while other portions of the bearing blank remain in a solid state. The remelted first surface is quenched such that fine particles of iron carbide precipitate in a remelted zone having an increased hardness and a decreased presence of graphite particles. A bearing element having a core portion composed of cast iron and an integral first surface portion including a precipitate of fine iron carbide particles, and having greater hardness and lesser incidence of graphite particles than the core portion, is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.