14c28n heat treatment

Após tempera no óleo, quanto tempo devo deixar uma faca de 3 mm de espessura sem nitrogênio líquido?
 
After HARDENING in oil, the blades need two temper cycles at around 350°F/180°C.

Harden wrapped in a foil packet at 1060°C/1940°F for 10 minutes
Quench in oil and cool to room temperature in the air.
Temper twice at 180°C/350°F for 2-hours each temper cycle. Cool to room temperature by dunking in water between the temper cycles.
 
I think he might be asking how long he can leave a 3mm blade before putting in LN? I usually move blades from quench plates to a -5°F freezer to cool down before into LN. The general idea is the quench is a continuing process of cooling from max all the way to LN temp in a smooth continuous step. While that's not truly possible, it's good to be as close as possible.

Creo que podría estar preguntando cuánto tiempo puede dejar una cuchilla de 3 mm antes de ponerla en LN. Normalmente muevo las cuchillas de las placas de enfriamiento a un congelador a -5 °F para que se enfríen antes de ponerlas en LN. La idea general es que el enfriamiento es un proceso continuo de enfriamiento desde la temperatura máxima hasta la temperatura de LN en un paso continuo y suave. Si bien eso no es realmente posible, es bueno estar lo más cerca posible.
 
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