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Hardening / Tempering:
Austenitisation under protective atmosphere. Stress-relief
quenching in molten salt bath and subsequent tempering in
convention tempering furnaces.


Austempering / Bainite:
When austempering, the parts remain in the molten salt bath
at constant temperature after quenching until conversion into
bainite. Usually there is no tempering.
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Stress-relief Annealing:
It is possible both with hood-type furnaces under protective
atmosphere and with convection tempering furnaces, too.


Nitriding / Nitrocarburizing:
The protective atmospheres required for the heat treatment
methods are produced by nitrogen, ammonia and carbon dioxide.
An air circulator ensures continuously for a directed flow. The
cooling of the batch is done indirectly by ambient air.
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