Gas-carburizing process and apparatus

Details Gas-carburizing process and apparatus Gas-carburizing process and apparatus

1992-03-16

1993-07-06

Sheehan, John P.

Metallurgical apparatus

Means treating solid metal

By contact with gas

266252, C21D 106

Patent

active

052251446

ABSTRACT:
A gas-carburizing process wherein an article is treated by feeding a hydrocarbon gas and an oxidative gas of raw material gases directly into an atmospheric heat treating furnace, characterized in that, when the pressure within the furnace is negative, CO.sub.2 is fed as a negative pressure dissolving means.
A gas-carburizing apparatus wherein a gas inlet for feeding a hydrocarbon gas and an oxidative gas provided in the ceiling part of an atmospheric heat treating furnace is provided with a CO.sub.2 feeding part for dissolving the negative pressure within the furnace.

REFERENCES:
patent: 3284074 (1966-11-01), Kotatko et al.
patent: 4279406 (1981-07-01), Bourhis et al.

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