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The paper presents results of the research focused on testing of wear resistance of a selected case-hardening steel after application of a selected plasma nitriding technology. The steel equivalent 16MnCr5 (i. e. CSN 41 4220) is frequently utilized in manufacturing of large diameter components, in automotive and small arms industry. The chemical composition of tested steel was verified by optical emission spectrometry on the instrument Tasman Q4 Bruker. The microstructure, tribology tracks and tracks obtained by Scratch Test were observed by Opto-digital microscope Olympus DSX500i. The depth of nitrided layers was measured by utilizing of microhardness profiles obtained by the automated microhardness tester LM247 AT LECO equipped by hardness testing system AMH55. The tribometer Bruker UMT-3 TriboLab was utilized for measurement of kinetic friction coefficient by the method Ball-on-Flat. The same instrument was also utilized for Scratch Test. The wear resistance was assessed according to the cross-sectional profiles of wear tracks obtained by profilometer Talysurf CLI1000. The paper provides the results proving benefits connected with the utilization of the plasma nitrided layers on the selected case-hardening steel.
Keywords: Plasma nitriding, case-hardening steel, wear resistance, friction coefficient, microhardness© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.