2022 №11 (03) DOI of Article
2022 №11 (05)

The Paton Welding Journal 2022 #11
The Paton Welding Journal, 2022, #11, 21-26 pages

Ion-plasma nitriding of inner cylindrical surfaces of products

I.V. Smirnov1, A.V. Chornyi1, V.V. Lysak1, M.O. Sysoyev2, G.P. Kysla2

1E.O. Paton Training-Research Institute of Materials Science and Welding of NTUU «Igor Sykorskyi Kyiv Polytechnic Institute». 37 Peremohi Ave. 03056. Kyiv. E-mail:,,
2PJSC «PlasmaTek». 18 Maksymovych 21036, Vynnitsya.

Technological modes of pulsed ion-plasma nitriding of inner cylindrical surfaces with application of a hollow perforated anode were developed. It results in formation of diff usion coatings, consisting of areas of diff erent chemical and phase composition. Maximum concentration of nitrogen is observed in the areas opposite openings in the anode, which are made at a certain distance at a certain angle. Accordingly, these same areas contain a hard phase from iron nitride, discretely arranged in a soft matrix of -iron. Testing under the conditions of dry friction of metal against metal showed that the wear resistance of specimens, taken from diff erent areas of the nitrided specimens, is 3 – 5 times higher than in the initial non-nitrided specimen that is indicative of a high wear resistance and good prospects for their further investigation. 12 Ref., 1 Tabl., 6 Fig.
Keywords: ion-plasma nitriding, discrete-matrix coatings, process modes, wear resistance, inner cylindrical surfaces

Received: 17.10.2022
Accepted: 29.12.2022


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