POROSITY IN SURFACE LAYERS AFTER CHEMICAL-HEAT TREATMENT

1 POKORNY Zdenek
Co-authors:
1 DOBROCKY David 2 SURLAKOVA Maria
Institutions:
1 Department of Mechanical Engineering, University of Defence in Brno, Kounicova 65,662 10 Brno, Czech Republic
2 Alexander Dubcek University Trencin, Faculty Special Technology, Pri Parku 19, Trencin 91105, Slovakia
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1147-1152
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
12 views / 1 download
Abstract

The article deals with porosity of compound layers after gas and plasma nitriding. Experiments are focused on using of gas and plasma nitriding processes for surface treatment. Nitriding technologies were applied to steels C 35 (sample A1) and steel 34CrNiMo6 (sample A6), which were subsequently evaluated by electron microscopy, GDOES, XRD and microhardness methods. The results of measurement showed characteristics of chemical composition of alloying elements in core of material and in created nitrided layer after chemical-heat treatment process. Main task was to compare the porosity after plasma and gas nitriding and finally prepare the documentation of pores from surface and from cross sectional structure. Plasma and gas nitriding process were applied for increasing of surface hardness of material in depth and improve mechanical and tribological properties. Mechanical and tribological properties of tested material were significantly increased.

Keywords: Gas nitriding; plasma nitriding; alloying elements; nitrided layer; porosity
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