Low Temperature Plasma Nitriding of Low Alloy Steel for the Enhancement of Hardness
TypeArticles dans des revues avec comité de lecture
The present concerns surface modification of low alloy CrMoV steel by following the route of plasma nitriding for the improvement of hardness. Plasma nitriding was performed at a low temperature of 450 oC. The maximum hardness at this lower temperature was found to be ∼1270 Hv after nitriding. At 550 oC though the hardness improvement near the surface region was similar but the core hardness was reduced. XRD studies revealed various nitrides of iron (γ′ (Fe4N) and ε (Fe2–3N)) with the ε nitride as the dominant phase. SEM analyses revealed the surface microstructure with almost no white layer. EDS point analyses shown the signature of N on the surface layer. It has been concluded in this study that the hardness of 90CrMoV8 steel can be improved significantly even at a low temperature of 450 oC without any of risk of the loss of core hardness.
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RAM MOHAN RAO, K.; NOUVEAU, Corinne; KHANNA, A.S.; ANEJA, Karanveer S.; TRINADH, Kalimi (Elsevier BV, 2020)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 ...
Electrochemical study on the corrosion resistance of surface modified Cr-Mo-V steel by elevated temperature plasma nitriding TRINADH, Kalimi; NOUVEAU, Corinne; KHANNA, Anand Sawroop; ANEJA, Karanveer S; RAO, K Ram Mohan (IOP Publishing, 2019)This study presents the effect of plasma nitriding on corrosion resistance of low alloy 90CrMoV8 steel. At a selected temperature of 500 °C, nitriding was performed by varying the exposure time. X-ray diffraction of nitrided ...
RAO, K. Ram Mohan; NOUVEAU, Corinne; TRINADH, Kalimi (Springer, 2020)This study presents the plasma nitriding of Cr–Mo–V tool steel to protect it from environmental degradation. The steel samples after metallographic polishing were nitrided in the glow discharge plasma of N2 and H2 gas ...
RAO, K. Ram Mohan; TRINADH, Kalimi; NOUVEAU, Corinne (Elsevier BV, 2019)Surface modification of tool steel had been performed by utilizing plasma nitriding at elevated temperature by varying the exposure time. The nitrided steel had shown significantly enhanced corrosion resistance properties. ...
TRINADH, Kalimi; NOUVEAU, Corinne; RAO, K. Ram Mohan (Elsevier BV, 2021)In this study the effects on resistance to corrosion of a low alloy steel after plasma nitriding has been reported. Nitriding was performed at a low temperature of 450 °C and also at 520 °C for the same duration of 10 h ...