Metallurgical apparatus – Means treating solid metal – Having evacuated chamber
Patent
1985-01-04
1987-03-31
Brody, Christopher W.
Metallurgical apparatus
Means treating solid metal
Having evacuated chamber
266259, C21D 900
Patent
active
046537325
ABSTRACT:
An industrial furnace for heat-treating metallic workpieces has separate heating and cooling chambers. The latter uses a circulating cooling gas, the flow of which against or past the workpieces produces cooling or gas-quenching. The furnace may have another chamber for oil-quenching lying below the gas-cooling chamber. In order to enable the gas cooling to operate quickly and efficiently, a cooling box fed with air by ventilator fans is provided in the shape of a tunnel, with internal surfaces above and at both sides of the effective cooling space constituted by interchangeable nozzle plates (or blank plates if no nozzle openings are desired at the top or at the sides). The workpieces to be cooled rest on a platform which may be raised or lowered to adjust the distance from the top nozzle plate or lowered into an oil bath. The nozzle plates provide a choice of nozzle patterns for different articles or groups of articles to be cooled after heat treatment. The nozzle plates may have setbacks or protrusions in order to vary the spacing of the nozzle openings from the median plane of the cooling tunnel.
REFERENCES:
patent: 4171126 (1979-10-01), Zahn et al.
Neubauer Wilhelm
Wunning Joachim
Aichelin GmbH
Brody Christopher W.
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