4. Gaseous treatment
4.1 Gas cementation and carbonitriding (at atmospheric pressure)
The treatment is carried out in a sealed furnace in which a controlled atmosphere is maintained at slight overpressure, consisting of a carrier gas to which is added, if necessary, a carbon enrichment gas and, in addition, nitrogen in the case of carbonitriding, to achieve the desired carbon potential.
The main case-hardening reactions are :
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Gaseous treatment
Heat treatment after carburizing or carbonitriding
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- Aciers de construction non alliés et alliés spéciaux pour cémentation. Nuances. Demi-produits, barres et fils machine. - NF A 35-551 - 7.86
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