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2. Case-hardening and carbonitriding steels
2.1 General
The choice of steel on which the treatment is carried out is an important parameter with regard to the possibilities of obtaining the structure and, therefore, the properties of the case-hardened or carbonitrided part.
In principle, a case-hardening or carbonitriding steel should have a low carbon content, i.e. less than 0.4%. After treatment, this low value enables good toughness characteristics to be maintained, while at the same time benefiting from good surface properties thanks to the contribution of interstitials during treatment.
Within the carbon range indicated above, the 0.2 to 0.4% C zone is generally reserved for grades intended for carbonitriding, while grades below 0.2% are more particularly attributed to case-hardening....
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Case-hardening and carbonitriding steels
Characteristics of the case-hardening or carbonitriding layer
Bibliography
Article M 1 225
Standards and norms
French Standards Association (AFNOR)
Steel standards
- Aciers à dispersoïdes destinés au forgeage à chaud. Demi-produits et barres. - A 33-111 - 10.87
- Aciers de construction non alliés et alliés spéciaux pour cémentation. Nuances. Demi-produits, barres et fils machine. - NF A 35-551 - 7.86
- Aciers pour tempe et revenu. Partie 1 : conditions techniques de livraison des aciers spéciaux (indice...
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