Gas carburizing of steel with furnace atmospheres formedIn Situ from propane and air: Part II. Analysis of the characteristics of gas flow in a batch-type sealed quench furnace |
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Authors: | C A Stickels C M Mack |
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Affiliation: | (1) Engineering and Research Staff, Ford Motor Co., Dearborn, MI |
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Abstract: | Gas flow dynamics in a batch-type sealed quench carburizing furnace were studied for operations utilizing low inlet gas flow
rates. By analyzing the rate of change of furnace atmosphere composition when a sudden change is made in the inlet gas composition,
it is shown that a significant amount of gas circulation occurs between the hot furnace chamber and the unheated vestibule.
This circulation has the effect of increasing the mean residence time of gases within the furnace. A long mean residence time
is advantageous for carburizing when the inlet gases consist of an airJhydrocarbon blend rather than prereacted endothermic
gas. |
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