5. Nitriding and nitrocarburizing under reduced pressure
This process is similar to gas nitriding in a vacuum purge furnace, comparable to the furnaces used for tempering steels after vacuum quenching. The nitriding medium is a gaseous mixture under reduced pressure (100 to 400 hPa). The compounds used are ammonia-based, with possible additions of methane (nitrocarburizing) and oxygen (pure or in the form of oxidized varieties, N 2 O), whose role seems paramount in controlling the combination layer . The reduction in pressure increases the mean free path and thus the stability of the gaseous molecules introduced, as well...
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Nitriding and nitrocarburizing under reduced pressure
High-temperature nitriding of stainless steels
Bibliography
Standards and norms
French Standards Association (AFNOR)
PSA
- Nitruration - 315-2240 - 02.85
- Nitruration des aciers - 02-60-206 - 01.93
- Spécification technique pour la nitruration et les nitrocarburations des dentures d'engrenages - DN1 - 12.88
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