Retention time in furnace

[eagertknow]

I want to do circulation fan selection for a Gas nitriding furnace modification.I am looking for retention time of gases for different materials during heating/nitriding cycles of two stage Floe process.Can anybody help?

 

[Goahead]

Duration of process depends on material and depth of case required. A positive dissociated ammonia gas flow through the furnace must be assured during the whole active nitriding stages.

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