Nitrogen diffusion in different microstructures of plasma nitrided CK45 steel

Autor:	Hossein Aghajani, F. Feyzi, S. Haghighat, Farzad Foadian
Rok vydání:	2013
Předmět:	Diffraction Materials science Annealing (metallurgy) Scanning electron microscope Mechanical Engineering Metallurgy chemistry.chemical_element Plasma Condensed Matter Physics Microstructure Nitrogen chemistry Mechanics of Materials General Materials Science Tempering Nitriding
Zdroj:	Materials Science and Technology. 30:86-90
ISSN:	1743-2847 0267-0836
Popis:	In this study, the nitrogen diffusion in different microstructures of CK45 steel was studied. Different microstructures were achieved by different heat treatment cycles as annealing, normalising and quench tempering. After heat treatment, plasma nitriding was performed at 550°C temperature, nitriding times of 5 h, in a gas mixture containing 25 vol.-%H2/75 vol.-%N2 and DC pulsed plasma nitriding unit. The surface, cross-section and the thickness of diffusion and white layers of specimens were studied in terms of optical and scanning electron microscopy. Surface phases have been studied by X-ray diffraction analysis. Results showed that by normalising the samples, higher diffusion depths could be achieved and the white layer thickness would be also higher. Other results showed that core hardness of quench tempered specimens could decrease after plasma nitriding due to being subjected to nitriding process temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8842f69a67200336ef8558d2b41a1032 https://doi.org/10.1179/1743284713y.0000000345 Zobrazit plný text záznamu