Machines. Technologies. Materials.
Vol. 20 (2026), Issue 4, pg(s) 174-176

MATERIALS

Increasing the Durability of Agricultural Working Bodies by Creating Nanostructured Coatings Using Plasma Jet Spraying

  • 1 “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
  • 2 Technical University of Moldova, 168, Ștefan cel Mare Blvd., Chișinău, Republic of Moldova

Abstract

The article reveals a new method that relates to the treatment of active surfaces of agricultural working bodies, in particular harrow discs, by applying nanostructured coatings using atmospheric plasma jet spraying (APS). The process consists of preparing the surface by corundum blasting at a pressure of 5.5 bar, followed by preheating to 150°C and depositing a nanostructured powder of the WC-Co 88/12 type.
The technical novelty lies in the synergetic optimization of the deposition parameters: current intensity of 550 A, hydrogen flow rate of 9 L/min, spraying distance of 100 mm and a high scanning speed of 500 mm/s, under forced post-deposition cooling.
The technical result obtained by applying this process consists of creating a protective layer with porosity below 1.2%, adhesion of over 65 MPa and a hardness of 1150-1250 HV0.3, ensuring an increase in the durability of the working element of up to 2.8 times under conditions of severe abrasive wear.

Keywords

References

  1. MUNTEANU, C., MELNIC, IU., ISTRATE, B., HARDIMAN, M., GAIGINSCHI, L., LUPU, F., ARSENOAIA, V., CHICET, D. ZÎRNESCU, C., BADIUL, V. A Comprehensive Review of Improving the Durability Properties of Agricultural Harrow Discs by Atmospheric Plasma Spraying (APS). In: Coatings 2025, 15(6), 632; ISSN 2079-6412.
  2. https://www.mdpi.com/search?q=&journal=coatings&sort=pubdate&page_count=50
  3. MUNTEANU, C., MELNIC, IU., ISTRATE, B., LUPU, F., M., VIȘANU, V. Study of harrow discs coated by plasma-thermal method. XIII International Scientific and Technical Congress “AGRICULTURAL MASHINERY” 25.06-28.06 2025, Varna, Bulgaria. In: International Scientific Journal “Mechanization in agriculture & Conserving of the resources”, Vol. 69 (2025), Issue 2, pg(s) 46-49. ISSN print 2603-3704, ISSN web 2603-3712.
  4. https://repository.utm.md/bitstream/handle/5014/35970/Journal-Mechanization-Agriculture-Conserving-Resources-2025-V71-nr2-p46-48.pdf?sequence=1
  5. https://stumejournals.com/journals/am/2025/2/46
  6. MUNTEANU, C., MELNIC, IU., ARSENOAIA, V., ISTRATE, B., LUPU, F., VIȘANU, V., ZÎRNESCU, C., BADIUL, V. Wear Performance of Agricultural Harrow Discs Coated by Plasma-Jet Thermal Deposition. XXIII International Scientific Congress “MACHINES. TECHNOLOGIES. MATERIALS”, 25-28.03.2026, Borovets, Bulgaria. In: International Journal for Science, Technics and Innovations for the Industry „MACHINES. TECHNOLOGIES. MATERIALS”, Vol. 20 (2026), Issue 3, pg(s) 81-84. ISSN PRINT 1313-0226, ISSN WEB 1314-507X.
  7. https://repository.utm.md/bitstream/handle/5014/35967/Journal-Machines-Technologies-Materials-2026-V20-nr3-p81-84.pdf?sequence=3
  8. BARZEGAR, M., HASHEMI, S., NAZOKDASTB, H. Evaluating the draft force and soil-tool adhesion of a UHMW-PE coated furrower. In: Soil Tillage Res., Vol. 163, 2016. pp. 160-167.
  9. BÎRSAN, I., SĂNDULACHE, C. Cercetări privind uzura abrazivă a oțelurilor pentru agricultură. Buletinul Tehnic ISIM, vol. 12, pp. 45-50, 2023.
  10. MUNTEANU, C., ISTRATE, B., LUPU, F., BENCHEA, M., MELNIC, IU., VIȘANU, V. Increasing the Mechanical Characteristics of the Disc Harrow Component by APS Thermal Coatings. In: Thermal Spray 2025: Proceedings from the International Thermal Spray Conference May 6–8, 2025; Vancouver, Canada. Vancouver: Published Online: May 05 2025, Paper No: itsc2025fm01, pp. iii-v; 3 pages. pp. 508-514.
  11. https://doi.org/10.31399/asm.cp.itsc2025p0508
  12. ARSENOAIA, V., MUNTEANU, C., LUPU, F., ISTRATE, B., LUPU, F., BENCHEA, M., MELNIC, IU. Field Performance and Wear Behavior of Atmospheric Plasma Spraying (APS) Coated Discs Used in Agricultural Disc Harrows. In: Agriculture 2026, 16(1), 114; ISSN 2077-0472.
  13. https://ibn.idsi.md/sites/default/files/imag_file/agriculture_16-00114-v2%20%281%29_compressed.pdf
  14. MUNTEANU, C., MELNIC, IU., ISTRATE, B., BENCHEA, M., BADIUL, V., ZÎRNESCU, C. Tribological Analysis of Plasma Spray Thermal Deposition on the Active Area of Harrow Discs. X International Congress “Industry 4” 10-13.12.2025, Borovets, Bulgaria. In: International Journal for Science, Technics and Innovations for the Industry „MACHINES. TECHNOLOGIES. MATERIALS”, Vol. 19 (2025), Issue 12, pg(s) 466-469. ISSN PRINT 1313-0226, ISSN WEB 1314-507X.
  15. https://repository.utm.md/bitstream/handle/5014/35975/Journal-Machines-Technologies-Materials-2025-V19-nr12-p466-469.pdf?sequence=1
  16. MUNTEANU, C., CIMPOIESU, R., LUPU, F., NAZAR, B., ISTRATE, B., MELNIC, IU., VIȘANU, V. Corrosion and Thermal Shock Behavior of Atmospheric Plasma Spraying Coatings on Agricultural Disc Harrows. In: Applied Sciences 2026, 16(8), 3703; ISSN 2076-3417.
  17. https://www.mdpi.com/2076-3417/16/8/3703
  18. MUNTEANU, C., TUFESCU, A., LUPU, F., ISTRATE, B., BENCHEA, M., MELNIC, IU., VIȘANU, V., ARSENOAIA, V. Explicit FEM Analysis of Soil-Disc Interaction for APS-Coated Notched Harrow Discs in Representative Agricultural Soils. In: Applied Sciences 2026, 16(1), 395; ISSN 2076-3417.
  19. https://www.mdpi.com/2076-3417/16/1/395
  20. MELNIC, IU., MELNIC, V. Mathematical modeling of the operating system of the carousel type transplanting machine. III International Scientific Conference “Mathematical modeling”, Borovets, Bulgaria, 11-14 decembre 2019. In: International Scientific Journal “Mathematical modeling”, Vol.3, Issue 4. 2019. pp.124-126, Print ISSN 2535-0986, Web ISSN 2603-2929.
  21. https://stumejournals.com/journals/mm/2019/4/124
  22. MELNIC, IU., SCLEAR, P. Theoretical research of tractive resistance of rotary type seeders. VII International Scientific Congress “Agromachinery” Burgas, 26-29 june 2019. In: International Scientific Journal “Mechanization in agriculture & Conserving of the resources”, nr.3. 2019, pp.85-87, ISSN print 2603-3704, ISSN web 2603-3712.
  23. https://stumejournals.com/journals/am/2019/3/85
  24. MELNIC, IU., BADIUL, V., MELNIC, V., CĂTANĂ, M. Study of the technological process of operation of transplanting machines. XII International Scientific and Technical Congress “AGRICULTURAL MASHINERY” 26.06-29.06 2024, Varna, Bulgaria. In: International Scientific Journal “Mechanization in agriculture & Conserving of the resources”, Issue 2, 2024. pp.30-32. ISSN print 2603-3704, ISSN web 2603-3712.
  25. https://stumejournals.com/journals/am/2024/2/30

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