Vacuum furnace with movable hot zone
US5524020A · kind A · utility
6Cited by
11References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Aug 23, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/767
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high temperature vacuum heat treating furnace has a hot zone, including heating elements and thermal insulation, which is movable between a heating location at least partly surrounding a load space and a cooling location remote from the load space. A cooling gas plenum around the hot zone in the heating location can eject cooling gas toward a load in the load space after the hot zone is retracted. Cooling rates approximately comparable to a furnace operable at four bar pressure can thereby be obtained in a furnace rated for no more than two bar internal pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.