04. Skoblo Т.S., Klochko О.Yu., Avtukhov A.K., et al. Strengthening Thin-Walled Knives with Nitrogen Plasma

UDK 631.356:620.178.16

DOI: 10.15507/2658-4123.031.202101.056-079

Strengthening Thin-Walled Knives with Nitrogen Plasma

Tamara S. Skoblo
Professor of the Chair of Technological Systems of Repair Production, Kharkiv Petro Vasylenko National Technical University of Agriculture (44 Alchevskikh St., Kharkiv 61002, Ukraine), D.Sc. (Engineering), Researcher ID: G-2334-2018, ORCID: https://orcid.org/0000-0002-9824-4550, This email address is being protected from spambots. You need JavaScript enabled to view it.

Oksana Yu. Klochko
Associate Professor of the Chair of Materials Technology, Kharkiv Petro Vasylenko National Technical University of Agriculture (44 Alchevskikh St., Kharkiv 61002, Ukraine), D.Sc. (Engineering), Researcher ID: H-7478-2018, ORCID: https://orcid.org/0000-0003-3623-6587, This email address is being protected from spambots. You need JavaScript enabled to view it.

Anatoly K. Avtukhov
Associate Professor of the Chair of Technological Systems of Repair Production, Kharkiv Petro Vasylenko National Technical University of Agriculture (44 Alchevskikh St., Kharkiv 61002, Ukraine), D.Sc. (Engineering), Researcher ID: C-1306-2018, ORCID: https://orcid.org/0000-0002-7613-1803, This email address is being protected from spambots. You need JavaScript enabled to view it.

Vladimir N. Romanchenko
Head of the Chair of Technological Systems of Repair Production, Kharkiv Petro Vasylenko National Technical University of Agriculture (44 Alchevskikh St., Kharkiv 61002, Ukraine), Cand.Sc. (Engineering), Associate Professor, Researcher ID: G-6154-2017, ORCID: https://orcid.org/0000-0002-0445-3125, This email address is being protected from spambots. You need JavaScript enabled to view it.

Artem V. Plugatarev
Senior Lecturer of the Chair of Physics and Theoretical Mechanics, Kharkiv Petrо Vasilenko National Technical University of Agriculture (44 Alchevskikh St., Kharkiv 61002, Ukraine), Cand.Sc. (Engineering), Researcher ID: E-9979-2017, ORCID: https://orcid.org/0000-0001-7255-1002, This email address is being protected from spambots. You need JavaScript enabled to view it.

Ivan N. Rybalko
Senior Lecturer of the Chair of Physics and Theoretical Mechanics, Kharkiv Petrо Vasilenko National Technical University of Agriculture (44 Alchevskikh St., Kharkiv 61002, Ukraine), Cand.Sc. (Engineering), Researcher ID: I-8014-2016, ORCID: https://orcid.org/0000-0002-3663-019X, This email address is being protected from spambots. You need JavaScript enabled to view it.

Introduction. The completed developments are aimed at creating a new technology for increasing the wear resistance of a thin-walled instrument of complex configuration made of steel 65G for cutting beets at sugar enterprises. The most important requirement to improve the operability and durability of such a tool is the preservation of its profile and cutting edge during operation.
Materials and Methods. A new developed equipment and technological process of strengthening using low-temperature nitrogen plasma were used to solve this problem. There have been determined optimal processing parameters that ensure the formation of a quasi-morphic structure on the friction surface that reduces the defectiveness of the cutting edge after its machining and also provides a process of self-sharpening due to tool strengthening on one side.
Results. The comparative studies of the friction surface of products after operational tests have shown that their resistance increase significantly when strengthening both new and used products. This is determined by the nature of the quasi-morphic structure formed and the specific relief in friction on the working surface.
Discussion and Conclusion. To describe the new process of strengthening thin-walled products, the structure formation on the friction surface was analyzed in detail with the use of metallographic images and its phase relationship variability was estimated by the optic-mathematical analysis of various zones (compression and vacuum) formed as friction bands. This was done trough modeling with the estimation of the distribution density of the conditional colors of the analyzed fragments.

Keywords: beet-cutting knives, ion-plasma strengthening, optical-mathematical analysis, structure formation, kinetics of wear

Conflict of interest: The authors declare no conflict of interest.

For citation: Skoblo Т.S., Klochko О.Yu., Avtukhov A.K., et al. Strengthening Thin-Walled Knives with Nitrogen Plasma. Inzhenerernyye tekhnologii i sistemy = Engineering Technologies and Systems. 2021; 31(1):56-79. DOI: https://doi.org/10.15507/2658-4123.031.202101.056-079

Contribution of the authors:
T. S. Skoblo – preparation of materials, synthesis and description of results.
O. Yu. Klochko – mathematical treatment of results.
A. K. Avtukhov – electron microscopic examinations.
V. N. Romanchenko – justification and choice of hardening technology.
A. V. Plugatarev – cutting and preparing samples for research, identifying the microstructure.
I. N. Rybalko – participation in electron microscopy experiments and friction surface studies.

All authors have read and approved the final manuscript.

Submitted 11.08.2020; approved after reviewing 12.10.2020;
accepted for publication 26.10.2020

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