Method and apparatus for the electroinduction heating of metal w

Details Method and apparatus for the electroinduction heating of metal w Method and apparatus for the electroinduction heating of metal w

1977-12-23

1980-12-02

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219 1049R, 219 1067, 13 26, 266253, 266129, H05B 602, H05B 626, C21D 174

Patent

active

042373590

ABSTRACT:
A method of heating metal workpieces so as to minimize scale formation and decarburization using an electroinduction heater, comprises placing the workpiece in the vicinity of the induction heater, reducing the air present in the vicinity of the workpiece to provide a reduced air atmosphere, and heating the metal by an electroinduction heater in the reduced air atmosphere. The air is advantageously displaced by a protective gas and this is done before the workpiece is heated to a temperature of 350.degree. C. A device for carrying out the heating, comprises a thermally insulated hood which has an interior heating cavity which opens downwardly and which is made gas-proof at its sides and top. A thermally insulated bottom fits into the opening of the hood and substantially fills the cavity and it is provided with a support area for the workpiece which, when the bottom is inserted, is positioned alongside the electroinduction heater. A lifting device is associated with the bottom for raising it into the cavity and for lowering it downwardly out of the cavity when the workpiece is to be removed.

REFERENCES:
patent: 1925028 (1933-08-01), Brieger
patent: 2461765 (1949-02-01), Olt
patent: 2506425 (1950-05-01), Journeaux
patent: 2869856 (1959-01-01), Greene
patent: 3291954 (1966-12-01), Scheffler
patent: 3894892 (1975-07-01), Conta
patent: 3926415 (1975-12-01), Konas et al.

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