Automatic Welding, 2022, №11



2022 №11 (05)

DOI of Article 10.37434/as2022.11.06

2022 №11 (07)

---

Avtomaticheskaya Svarka (Automatic Welding), #11, 2022, pp. 39-44

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: smirnovkpi@gmail.com, black803@gmail.com, vvlysak@ukr.net
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

References

1. Pastukh, I.M. (2006) Theory and practice of hydrogen-free nitriding in glow discharge. Kharkov, NNTs KhFTI [in Russian].
2. Kaplun, V.G., Kaplun, P.V. (2015) Ion nitriding in hydrogen-free media. Khmelnitsky, KNU [in Russian].
3. Pye, D. (2003) Practical Nitriding and Ferritic Nitrocarburizing. ASM International Park, Ohio. https://doi.org/10.31399/asm.tb.pnfn.9781627083508
4. Hossein Aghajani, Sahand Behrangi (2016) Plasma Nitriding of Steels. Springer International Pub. https://doi.org/10.1007/978-3-319-43068-3
5. Farghali, A., Aizawa, T. (2017) Phase transformation induced by high nitrogen content solid solution in the martensitic stainless steels. Materials Transact., 58, 697-700. https://doi.org/10.2320/matertrans.M2016418
6. Aizawa, T., Wasa, К. (2017) Low temperature plasma nitriding of inner surfaces in stainless steel mini-/micro-pipes and nozzles. Micromachines, 8, 157. https://doi.org/10.3390/mi8050157
7. Pokorný, Z., Kadlec, J., Hruby, V. et al. (2011) Hardness of plasma nitrided layers created at diff erent conditions. Chemicke Listy, 105, 717-720.
8. Latas, Z., Michalski, J., Tacikowski, J., Betiuk, M. (2013) Azotowanie regulawane luf broni strzeleckiej. Inzynieria powierzchni, 1, 26-33.
9. Lyashenko,, B.A., Movshovich, A.Ya., Dolmatov, A.I. (2001) Reinforcing coatings of discrete structure. Tekhnologicheskie Sistemy, 4, 17-25 [in Russian].
10. Lyashenko, B.A., Soroka, E.B., Rutkovsky, A.V. (2002) Determination of discrete structure parameters of coatings taking into account the residual stresses. Problemy Prochnosti, 4, 119-125 [in Russian].
11. Katoh, T., Aizawa, T., Yamaguchi, T. (2015) Plasma assisted nitriding for micro-texturing martensitic stainless steels. Manufacturing Rev., 2, 7. https://doi.org/10.1051/mfreview/2015004
12. Matveev, N.V. (2007) Vacuum producing of discrete wear-resistant coatings using forming separator. Svarochn. Proizvodstvo, 5. 35-38 [in Russian].

---

Advertising in this issue:

---