Vacuum furnace for carburizing with hydrocarbons
US7204952B1 · kind B1 · utility
5Cited by
26References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2005 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Oct 31, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Vacuum carburizing of ferrous workpieces is performed at low pressure in a vacuum furnace using a carburizing hydrocarbon as the carburizing medium. The furnace is constructed to be generally transparent to the carburizing hydrocarbon so that cracking tends to occur at the workpiece which functions as a catalyst to minimize carbon deposits. The carburizing hydrocarbon is supplied in liquid form to an injector which injects the liquid carburizing hydrocarbon as a vapor to produce a uniform dispersion of the carburizing hydrocarbon about the workpiece, resulting in uniform carburizing of the workpieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.