Quenching method and apparatus
US7147732B2 · kind B2 · utility
0Cited by
3References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2001 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Sep 6, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/0062
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hot object is quenched after heat treatment. A hot gas stream having at least 20% by volume of hydrogen is taken from for example a carburising chamber of a furnace. The gas is cooled by passage through a heat exchanger, and is compressed in a compressor. The compressor has an aftercooler (not shown) to remove heat of compression from the gas. The cooled, compressed gas flows through nozzles into a quenching chamber. The gas leaves the nozzles at a velocity of at least 50 m/s and impinges upon the hot metal object so as to effect its quenching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.