Plasma Nitriding of 90CrMoV8 Tool Steel for the Enhancement of Corrosion Resistance

Article dans une revue avec comité de lecture
Auteur
RAM MOHAN RAO, K.
1059292 GITAM Institute of Science - Department of Chemistry
KHANNA, A.S.
54366 Indian Institute of Technology Bombay [IIT Bombay]
ANEJA, Karanveer S.
54366 Indian Institute of Technology Bombay [IIT Bombay]
TRINADH, Kalimi
11165 Department of Chemistry
NOUVEAU, Corinne
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]

URI
http://hdl.handle.net/10985/19679
DOI
10.1016/j.matpr.2020.04.413
Date
2020
Journal
Materials Today: Proceedings

Résumé

In the present studies, efforts were made to improve corrosion resistance of 90CrMoV8 tool steel by following plasma nitriding. Plasma nitriding of this steel at 500 oC for6and 8 h significantly improved the corrosion resistance when compared to the as-received steel. X-ray diffraction reveals γ′ (Fe, Cr)4 N) and ε ((Fe, Cr) 2–3 N) phases formed after nitriding. Potentiodynamic polarization tests in 3.5% NaCl reveal that plasma nitriding significantly improved the corrosion resistance as compared to untreated steel. The improvement in corrosion resistance may be attributed to the N solid solution and the presence of Fe-nitrides formed in the compound layer

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