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

Type
Articles dans des revues avec comité de lecture
Author
RAM MOHAN RAO, K.
1059292 GITAM Institute of Science - Department of Chemistry
NOUVEAU, Corinne
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]
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

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

Abstract

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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