Accelerated carburizing method with discrete atmospheres

Details Accelerated carburizing method with discrete atmospheres Accelerated carburizing method with discrete atmospheres

1984-11-13

1986-07-01

Brody, Christopher W.

Metal treatment

Compositions

Heat treating

148 167, C21D 174

Patent

active

045978077

ABSTRACT:
A method for operating a continuous rotary carburizing furnace is disclosed, wherein a carburizing mixture is introduced into the furnace retort without inerts while an inert gas is introduced into the shell of the furnace without carbon containing gases. The method effects an increase in productivity through an increased rate of carburization of work pieces with less carburization or sooting of the furnace apparatus.

REFERENCES:
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patent: 4306918 (1981-12-01), Kaspersma et al.
patent: 4317687 (1982-03-01), Kaspersma et al.
patent: 4322255 (1982-03-01), Kostelitz
Kaspersma and Shay, "A Model for Carbon Transfer in Gas-Phase Carburization of Steel--Journal of Heat Treating, vol. 1, No. 4, p. 27.
Peartree, "Two-Step Accelerated Carburizing Shortens Cycle, Saves Energy--Heat Treating Jul. 1981, p. 36.

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