Kinetics and wear behaviour of M50NiL steel plasma nitrided at low temperature

The quenched M50NiL steel was plasma nitrided at 460°C for different time to investigate the effects of the duration time on the microstructure, microhardness and wear resistance of the nitrided layers. The results show that the plasma nitrided layer depth increases with increasing nitriding time. T...

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Bibliographic Details
Published inMaterials science and technology Vol. 33; no. 3; pp. 370 - 376
Main Authors Yan, M. F., Wang, X. A., Liu, R. L., Zhang, Y. X., Yang, Y.
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 11.02.2017
SAGE Publications
Subjects
M50NiL steel
Microstructure
Plasma nitriding
Wear resistance
Plasma nitriding
Wear resistance
Microstructure
M50NiL steel
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Summary:The quenched M50NiL steel was plasma nitrided at 460°C for different time to investigate the effects of the duration time on the microstructure, microhardness and wear resistance of the nitrided layers. The results show that the plasma nitrided layer depth increases with increasing nitriding time. The plasma nitrided layer includes only the diffusion layer without compound layer. The main phases in the nitrided surface layer are nitrogen expended α′-Fe and γ′-Fe 4 N. The microstructure of the nitrided layer is refined. The wear resistance of the nitrided samples can be improved significantly by plasma nitriding. The sample nitrided for 4 h possesses the highest wear resistance, due to its relatively smooth surface and ultra-fine grains in the nitrided layer.
ISSN:0267-0836
1743-2847
DOI:10.1080/02670836.2016.1213027