Method and device for controlling the CO contents of a furnace a

Details Method and device for controlling the CO contents of a furnace a Method and device for controlling the CO contents of a furnace a

1996-04-22

1998-04-21

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148235, 266251, C23C 820, C23C 830

Patent

active

057413711

ABSTRACT:
A method for controlling the CO contents of furnace atmosphere for carburizing and carbonitriding metallic workpieces in a furnace includes the step of directly feeding a mixture of an oxidizing reagent and a hydrocarbon-containing fuel into the furnace for producing a CO-containing furnace atmosphere. The CO contents of the furnace atmosphere is measured and compared to a preset minimal CO value. A CO-forming substance is introduced into the furnace atmosphere when the measured CO contents is no longer greater than the preset minimal CO value.

REFERENCES:
patent: 4372790 (1983-02-01), Gohring et al.

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