Kinetics of Plasma Nitriding and Renitriding of 3% Cr-Mo-V Steel

Roliński, E.; Clubine, D.; Sharp, G.; LeClaire, Frank; Boyer, Daniel; Notman, R.

doi:10.1361/105994900770345863

Cited by 7 publications

(1 citation statement)

References 4 publications

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“…This will prolong the life of the tool in the service condition as the wear resistance for a wider case depth is expected to be more. Hardness achieved in the present study is much higher than the previously reported hardness values [13][14][15]. Hardness values achieved by elevated temperature plasma nitriding of CrMoV steel by other workers are shown in the following Table 1.…”

Section: Microhardnss Measurementscontrasting

confidence: 52%

Low Temperature Plasma Nitriding of Low Alloy Steel for the Enhancement of Hardness

Rao

Nouveau

Trinadh

2019

Materials Today: Proceedings

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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 o C. The maximum hardness at this lower temperature was found to be ~1270 Hv after nitriding. At 550 o C though the hardness improvement near the surface region was similar but the core hardness was reduced. XRD studies revealed various nitrides of iron (γ′ (Fe 4 N) and ε (Fe 2-3 N)) 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 o C without any of risk of the loss of core hardness.

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Section: Microhardnss Measurementscontrasting

confidence: 52%