# Assessment of the properties of hardened by nanocoating oil scraper piston rings by an optic-mathematical method

## Authors

• T.S. Skoblo Kharkiv Petro Vasylenko National Technical University of Agriculture, Kharkiv, Ukraine
• A.I. Sidashenko Kharkiv Petro Vasylenko National Technical University of Agriculture, Kharkiv, Ukraine
• T.V. Maltsev State Enterprise "Malyshev Plant", Kharkiv, Ukraine
• V.N. Romanchenko Kharkiv Petro Vasylenko National Technical University of Agriculture, Kharkiv, Ukraine

## Keywords:

multilayer nanocoating, piston ring, friction and wear, microhardness, optical-mathematical analysis, structure formation

## Abstract

The paper presents an optical-mathematical evaluation of the physic-mechanical properties of the D100 diesel-generator oil scraper piston ring surface hardened by multi-layer ion-plasma nanocoating TiN/CrN. The application parameters of multilayer nanocoating and the sequence of its layers are shown. The values of wear and microhardness of the hardened and serial rings are given. The increase in wear resistance of the hardened product is shown to be 12 times in weight and 4 times in the degree of increase in the size of its friction surface. A method for evaluating properties using the mathematical operators of the laplacian and divergences in their different variations is proposed. A correlation between the properties of the results of tests for friction and wear with using a mathematical description of structure formation was revealed. The minimal difference of the friction zone and the initial surface of the hardened ring, which does not exceed 16 %, is revealed. The difference between the initial surface and the friction zone in the serial ring is shown, which reaches up to 42 % on average in terms of indicators. A substantial deviation of the values of the friction zone mathematical operators of the serial ring from the TiN/CrN hardened by ion-plasma nanocoating was confirmed, which in some cases reaches up to 42 % on average.

## References

1. Skoblo T. S. Features of Wear of Oil-Scraper Piston Rings with Tin Coatings in Bench Tests for Friction and Wear / T. S. Skoblo, A. I. Sidashenko, E. A. Satanovskii, A. K. Oleinik, T. V. Maltsev // Materials Science, Vol. 53, Is. 4, 2018, – r. 501-507.
2. Skoblo T. S. Influence of Increased Sliding Speed on the Structure and Properties of Piston Rings with Ion-Plasma Coating / T. S. Skoblo, A. I. Sidashenko, I. E. Garkusha, A. V. Taran, R. M. Muratov, T. V. Maltsev // Problems of Atomic Science and Technology, Series: Plasma Physics (118) № 6, 2018, – p. 304 - 307.
3. Skoblo T. S. Primenenie kompyuternogo analiza metallograficheskih izobrazhenij pri is-sledovanii struktury vysokohromistogo chuguna / T. S. Skoblo, O. Yu. Klochko, E. L. Belkin // Zavodskaya laboratoriya. Diagnostika materialov, Moskva, t. 78, № 6, 2012 g. – s. 35–42.
4. Skoblo T. S. Ocenka stepeni neodnorodnosti karbidov geterogennyh splavov metodom opti-ko-matematicheskogo analiza pri pomoshi izmenchivosti uslovnyh cvetov / T. S. Skoblo, O. Yu. Klochko, E. L. Belkin, O. I. Trishevskij // Visnik HNTUSG im. P. Vasilenka. Resursozberigayuchi tehnologiyi, materiali ta obladnannya u remontnomu virobnictvi, Harkov, Vip. 168, 2016 g. – s. 174–186.
5. Skoblo T. S. Issledovanie struktury vysokohromistogo kompleksno legirovannogo chuguna s primeneniem metodov matematicheskogo analiza / T. S. Skoblo, O. Yu. Klochko, E. L. Belkin // Stal, № 3, 2012 g. – s.46–52.
6. Trishevskij O.I. Issledovaniya mikrostruktur geterogennyh splavov metodom matematiche-skogo analiza pri pomoshi sochetanij uslovnyh cvetov i absolyutnyh znachenij laplasianov / O. I. Trishevskij, T. S. Skoblo, O. Yu. Klochko, E. L. Belkin // Promyshlennost v fokuse, Harkov, №7 (31), 2015 g. – s.52–56.
7. Skoblo T. S. Opredelenie mikrotverdosti strukturnyh sostavlyayushih vysokohromistyh chu-gunov v rezultate matematicheskoj obrabotki ih izobrazhenij / T. S. Skoblo, O. Yu. Klochko, E. L. Belkin // Visnik HNTUSG im. P.Vasilenka. Problemi nadijnosti mashin ta zasobiv mehanizaciyi s/g virobnictva, Harkov, Vip. 151, 2014 g. – s.183–189.
8. Malcev T. V. Kompleksnaya ocenka ostatochnyh napryazhenij v porshnevyh kolcah / T. V. Malcev // Tehnichnij servis agropromislovogo, lisovogo ta transportnogo kompleksiv, m. Harkiv, № 10, 2017 r. – s. 80–87.

2019-07-29

## How to Cite

Skoblo, T., Sidashenko, A., Maltsev, T., & Romanchenko, V. (2019). Assessment of the properties of hardened by nanocoating oil scraper piston rings by an optic-mathematical method. Problems of Tribology, 24(2/92), 20–24. https://doi.org/10.31891/2079-1372-2019-92-2-20-24

Articles