Abstract and keywords
Abstract (English):
In the paper there are shown results on roughness parameter decrease on the electrospark coatings of 20H13 and 30 steel surfaces by means of smoothing with the use of the plant for non-abrasive ultrasonic finishing (NUF). For the coating formation there were used Ni, Cu and an intermetallic alloy based on Ni3Al phase. At the NUF increase of coatings formed with the use of Cu there is a roughness growth caused with material “pickup” upon an indenter. It is determined that for smoothing the surfaces with electrospark coating with the assurance of roughness considerable decrease a six-fold NUF processing is required. A microstructure of the coating obtained with the use of anode material based on the Ni3Al alloy consists of columnar crystal grains the cross-section dimensions of which change from some mkm to several tens of nm. Crystal grains are directed mainly normally regarding a cathode surface. By means of micro-X-ray spectrum analysis there is defined an elementary composition of columnar crystal grains corresponding to the alloy of the Nix-Aly-Fez system which is alloyed with Cr and contains admixtures of Si and Mn. By means of the microstructure investigation of the coating smoothed surface in a number of areas there are revealed crystal grains with the signs of plastic deformation.

electrospark alloying, processing, deformation, intermetallic alloy, roughness, surface, ion etching, crystal grains

1. Heard, D.W. Development of a nanostructure microstructure in the Al–Ni system using the electrospark deposition process / D.W. Heard, M. Brochu // Journal of Materials Processing Technology. 2010. - P. 892–898.

2. Verhoturov, A.D. Formirovanie poverhnostnogo sloya pri EIL / A.D. Verhoturov. - Vladivostok: Dal'nauka, 1995. - 323 s.

3. Gould, J. Application of Electro–Spark Deposition as a Joining Technology / J. Gould // Welding Journal, 2011. - Vol. 90. - P. 191–197.

4. Leo, P. Study of the Direct Metal Deposition of AA2024 by Electro Spark for Coating and Reparation Scopes / P. Leo, G. Renna, G. Casalino // Applied Sciences, 2017. - Vol. 7. - P. 1–16.

5. Tarelnyk, V. Modeling Technological Parameters for Producing Combined Electrospark Deposition Coatings / V. Tarelnyk, I. Konoplianchenko, N. Tarelnyk, A. Kozachenko // Materials Science Forum, 2019. - Vol. 968. - P. 131–142.

6. Radek, N. Laser treatment of electro–spark coatings deposited in the carbon steel substrate with using nanostructured WC–Cu electrodes / N. Radek, K. Bartkowiak // Physics Procedia, 2012. - Vol. 39. - P. 95-301.

7. Bagliuk, G. Surface hardening of metallic materials by use of combined mat–forming treatment and electrospark doping / G. Bagliuk, V. Makovey, Yu. Borodiy // International Scientific Journals of Scientific Technical Union of Mechanical Engineering «Industry 4.0» Machines. Technologies. Materials, 2019. - Vol.13. - Is. 1. - P. 15–18.

8. Mikhailyuk, A. I. Features of plastic deformation of electrospark coatings and ways for improvement of their strength characteristics at friction / A. I. Mikhailyuk, R. P. Zhitaru // Surface Engineering and Applied Electrochemistry, 2008. - Vol. 44. - No. 5. - P. 383–389.

9. Rakhimyanov, Kh. Technological Peculiarities Providing the Surface Quality Parameters at Ultrasonic Surface Hardening / Kh.Rakhimyanov, J. Semyonova, A. Eryomina // Applied Mechanics and Materials, 2015. - Vol. 698. - P. 482–486.

10. Khimukhin, S.N. Nickel aluminides coatings on steel S1030 after thermal cycling / S.N. Khimukhin, K.P. Eremina, H. Ri // Materials Today: Proceedings, 2019. - No 11. - P. 240–246.

11. Application guide manual for surfcom series surface roughness and waviness parameters. – Tokyo, Japan: Tokyo Seimitsu CO., LTD. – 96 p.

12. ISO 13565–2 – Geometrical Product Specifications (GPS) – Surface Texture: Profile method; Surfaces having Stratified Functional Properties – Part 2: Height Characterization Using the Linear Material Ratio Curve; International Organization for Standardization: Geneva, Switzerland, 1996.

13. Schneider, U. An approach to the evaluation of surface profiles by separating them into functionally different parts / U. Schneider, A. Steckroth, N. Rau, G.Hobner // Surface Topograhpy, 1988. - Vol.1. - P. 343–355.

14. Pawlus, P. Reverse Problem in Surface Texture Analysis – One–Process Profile Modeling on the Basis of Measured Two–Process Profile after Machining or Wear / P. Pawlus, R. Reizer, M. Wieczorowski // Materials, 2019. - Vol.12. - 12 p.

15. Muralikrishnan, B. Functional Filtering and Performance Correlation of Plateau Honed Surface Profiles / B. Muralikrishnan, J. Raja // Journal of Manufacturing Science and Engineering, 2005. - Vol. 127. - P. 193–197.

16. Graham, T. Smith. Industrial Metrology. Surfaces and Roundness. U.K. London: Springer / T. Graham, 2002. - 338 p.

17. Rosén, B.G. Wear of cylinder bore microtopography / B.G. Rosén, R.Ohlsson, T.R. Thomas // Wear, 1996. - Vol. 198. - Is. 1–2. - P. 271–279.

18. Khimukhin, S.N. The structure of the intermetallic coating after ultrasonic burnishing process / S.N.Khimukhin, K.P.Eremina, H.Ri // Materials Today: Proceedings. 2019. - No 19. - P. 2413 –2416.

Login or Create
* Forgot password?