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Physical Features of Anodic Plasma Electrolytic Carburising of Low-Carbon Steels

  • S. Yu. Shadrin
  • P. N. Belkin
  • I. V. Tambovskiy
  • S. A. KusmanovEmail author
Original Paper
  • 15 Downloads

Abstract

This study considers some aspects of electrolytic plasma in the process of anodic carburising of steel, including the nature of the glow in a vapour gaseous envelope, its thickness under various hydrodynamic conditions; it also examines the formation patterns of a hardened layer after carburising along with quenching in the same electrolyte. The glow in a vapour gaseous envelope was examined with a spectrometer; its profile and thickness were determined by solving energy and mass balance equations in a pre-anode area. The structure of the carburised layer and hardness distribution were explored with an optical microscope and a microhardness tester. Carbon concentration in the carburised layer was determined by means of optical emission spectroscopy. The investigation has revealed that the glow in a vapour gaseous envelope under carburising is a continuous emission from heated bodies—vapour gaseous phase and the sample without any electric discharges. It has been theoretically derived, that in laminar approximation the layer has maximal thickness under certain hydrodynamic conditions. This conclusion has been confirmed by homogeneous distribution of current density throughout the surface of the sample during its carburising under condition of force hydrodynamics, i.e. the sample being flowed round with cooled electrolyte. Aerated stirring in electrolyte does not provide homogeneous current density distribution, which falls in vertical direction. Anodic carburising of steel in a glycerol electrolyte followed by quenching results in the formation of a martensitic layer up to 200 μm in thickness, within 5-min treatment, with maximal microhardness 1000 HV.

Keywords

Plasma electrolysis Glow spectrum Envelope thickness Anodic carburising 

Notes

Acknowledgements

This work was financially supported by the Russian Science Foundation (Contract No. 18-79-10094) for Kostroma State University.

References

  1. 1.
    Hickling A, Ingram MD (1964) Contact glow-discharge electrolysis. Trans Faraday Soc 60:83–793CrossRefGoogle Scholar
  2. 2.
    Yerokhin AL, Nie X, Leyland A, Matthews A, Dowey SJ (1999) Plasma electrolysis for surface engineering. Surf Coat Technol 122:73–93CrossRefGoogle Scholar
  3. 3.
    Ntomprougkidis V, Martin J, Nominé A, Henrion G (2019) Sequential run of the PEO process with various pulsed bipolar current waveforms. Surf Coat Technol 374:713–724CrossRefGoogle Scholar
  4. 4.
    Parfenov EV, Farrakhov RG, Mukaeva VR, Gusarov AV, Nevyantseva RR, Yerokhin A (2016) Electric field effect on surface layer removal during electrolytic plasma polishing. Surf Coat Technol 307:1329–1340CrossRefGoogle Scholar
  5. 5.
    Belkin PN, Yerokhin AL, Kusmanov SA (2016) Plasma electrolytic saturation of steels with nitrogen and carbon. Surf Coat Technol 307:1194–1218CrossRefGoogle Scholar
  6. 6.
    Sen Gupta SK (2017) Contact glow discharge electrolysis: a novel tool for manifold applications. Plasma Chem Plasma Process 37(4):897–945CrossRefGoogle Scholar
  7. 7.
    Krivenko AG, Manzhos RA, Kotkin AS (2018) Plasma-assisted electrochemical exfoliation of graphite in the pulsed mode. High Energy Chem 52(32):272–273CrossRefGoogle Scholar
  8. 8.
    Vasiliev VP, Kotkin AS, Kochergin VK, Manzhos RA, Krivenko AG (2019) Oxygen reduction reaction at few-layer graphene structure obtained via plasma-assisted electrochemical exfoliation of graphite. J Electroanal Soc 851:113440CrossRefGoogle Scholar
  9. 9.
    Kellogg HH (1950) Anode effect in the aqueous electrolysis. J Electrochem Soc 97(4):133–142CrossRefGoogle Scholar
  10. 10.
    Belkin PN, Ganchar VI, Davydov AD, Dicusar AI, Pasinkovskii EA (1997) Anodic heating in aqueous solutions of electrolytes and its use for treating metal surface. Surf Eng Appl Electrochem 2:1–15Google Scholar
  11. 11.
    Sinkevitch YuV (2016) Conceptual model of commutation mechanism for electric conductivity of vapor-gas envelope in electro-impulse polishing mode. Sci Techn 15(5):404–414Google Scholar
  12. 12.
    Garbarz-Olivier J, Guilpin C (1975) Etude des discharges electriques produites entre l′electrode et la solution lors des effects d′anode et de cathode dans les electrolytes aqueux. J Chim phys 72(2):207–214CrossRefGoogle Scholar
  13. 13.
    Wu J, Wang K, Fan L, Dong L, Deng J, Li D, Xue W (2017) Investigation of anodic plasma electrolytic carbonitriding on medium carbon steel. Surf Coat Technol 313:288–293CrossRefGoogle Scholar
  14. 14.
    Kusmanov SA, Dyakov IG, Kusmanova YuV, Belkin PN (2016) Surface modification of low-carbon steels by plasma electrolytic nitrocarburising. Plasma Chem Plasma Process 36(5):1271–1286CrossRefGoogle Scholar
  15. 15.
    Yerokhin A, Mukaeva VR, Parfenov EV, Laugel N, Matthews A (2019) Charge transfer mechanisms underlying contact glow discharge electrolysis. Electrochim Acta 312:441–456CrossRefGoogle Scholar
  16. 16.
    Zhirov AV, Belkin PN, Shadrin SYu (2017) Heat transfer in the anode region in plasma-electrolytic heating of a cylindrical sample. J Eng Phys Thermophys 90(4):862–872CrossRefGoogle Scholar
  17. 17.
    Nellis G, Klein S (2009) Heat transfer. Cambridge University Press, New YorkGoogle Scholar
  18. 18.
    Shadrin SYu, Belkin PN (2012) Analysis of models for calculation of temperature of anode plasma electrolytic heating. Int J Heat Mass Trans 55:179–186CrossRefGoogle Scholar
  19. 19.
    Suminov IV, Belkin PN, Apelfeld AV, Ludin VB, Borisov AM (2011) Surface plasma electrolytic modification of the metals and alloys. Technosphera, Moscow (in Russian) Google Scholar
  20. 20.
    Zhirov AV, Shadrin SYu, Belkin PN (2018) Effects of electrolyte composition on heat exchange in anode plasma electrolyte treatment of commercial titanium. Surf Eng Appl Electrochem 54(2):136–141CrossRefGoogle Scholar
  21. 21.
    Lienhard JH IV, Lienhard VJH (2004) A heat transfer textbook, 3rd edn. Phlogiston Press, CambridgeGoogle Scholar
  22. 22.
    Fabijanic D, Timokhina I, Beladi H, Hodgson P (2017) The nitrocarburising response of low temperature bainite steel. Metals 7(7):234–241CrossRefGoogle Scholar
  23. 23.
    Sengupta SK, Singh OP (1991) Contact glow discharge electrolysis: a study of its onset and location. J Electroanal Chem 301:189–197CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2020

Authors and Affiliations

  • S. Yu. Shadrin
    • 1
  • P. N. Belkin
    • 1
  • I. V. Tambovskiy
    • 1
  • S. A. Kusmanov
    • 1
    Email author
  1. 1.Kostroma State UniversityKostromaRussia

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