Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Paul Stratton0
Date of Patent
December 12, 2006
0Patent Application Number
104332720
Date Filed
November 30, 2001
0Patent Primary Examiner
Patent 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.
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