20 bar super quench vacuum furnace
US9187799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Nov 11, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/0062
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A vacuum furnace for heat treating and rapid gas quenching insitu a work piece at pressures up to 20 Bar and high gas velocities. The furnace comprises a single chamber having an inner portion including a plurality of graphite heating elements and graphite insulation, an outer portion and an access door. Further included are movable radiation baffle doors. In their closed position hot gases heat treat the work piece. In their open position the hot gases escape through the opening created onto chevron-shaped baffles in the outer portion which reflect radiation heat energy back into the inner portion and diffuse only convective heat energy into a heat exchanger and a variable speed drive recirculating fan. The recirculating fan directs the cooling gases through cooling nozzles onto the work piece to quench it to a pre-programmed temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.