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Dražan, Tomáš
University of Defence
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document
The decreasing of porosity during diffusion technology
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. Diffusion technologies were applied to steels C 35 (sample A1) and steel 41Cr4 (sample A2), which were subsequently evaluated by electron microscopy, GDOES, XRD and microhardness methods. Main task was to compare the surface hardness connected with chemical composition of steels and the porosity after plasma and gas nitriding and finally prepare the documentation of pores from surface and from cross sectional structure. Plasma and gas processes 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.