Skip to main content
SpringerLink
Log in

Fatigue test results of the rotating steel blades of steam turbine K-25-0.6 GEO with ion-plasma coating

  • Steam-Turbine, Gas-Turbine, and Combined-Cycle Plants and Their Auxiliary Equipment
  • Published:
Thermal Engineering Aims and scope Submit manuscript

Abstract

Fatigue test results of the rotating steel blades of the fourth stage of the K-25-0.6 low pressure cylinder Geo steam turbine manufactured in the Kaluga Turbine Plant (hereinafter, KTP) with the ion-plasma coating were presented. Coating formation was carried out at the National Research University (MPEI) on the Gefest vacuum pilot plant by the magnetron sputtering method. Characteristics of the obtained coating were analyzed with the use of the scientific-research equipment of the National Research University (MPEI). Fatigue tests of the rotating blades and determination of the fatigue strength of the material with the ion-plasma coating were carried out on the electrodynamic vibration machines VEDS-400A in the KTP structural laboratory. The following characteristics were obtained after tests: Ti-TiN composition, 10–11 μm thickness, 1200 HV 0.05 microhardness. Fatigue tests showed that destruction, regardless of availability or nonavailability of the coating, took place by cross-section in the root zone both on the leading and trailing edges of the blade, i.e., in the most stressed zones. It was found out that the maximum stresses during tests were revealed in the root section along the trailing edge on the blade pressure side, and the less stresses were on the leading edge. Fatigue strength of the working blades after coating formation increased by 12% minimum. Results of the fatigue tests prove the previously obtained data concerning 10–12% increase of the fatigue strength of the blade steel with the ion-plasma coating and allow claiming that the process of their formation exerts the positive influence on the fatigue characteristics of the blade materials.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. G. V. Kachalin, V. A. Ryzhenkov, and A. F. Mednikov, “Improving the resource of essential elements of equipment on thermal and nuclear power plants based on the application of protective ion-plasma coating,” in Proc. All-Russian Sci.-Tech. Conf. ENERGO-2010 “Increasing Reliability and Effectiveness of Electric Power Plants and Energy Systems,” Moscow, July 1–3, 2010 (Mosk. Gos. Univ., Moscow, 2010), Vol. 1, pp. 81–84. http://www.energy2010.mpei.ru/_Files/Proceedings1.pdf.

    Google Scholar 

  2. V. I. Nogin, V. A. Ryzhenkov, A. I. Lebedeva, and S. I. Pogorelov, “Studying the effectiveness of the use of ion-vacuum coatings for rotor blade damage protection from corrosion and erosion in steam turbines,” Energosberezhenie Vodopodgot., No. 1, 30–36 (1999).

    Google Scholar 

  3. V. T. Troshchenko, B. A. Gryaznov, I. S. Malashenko, Yu. S. Nalimov, and A. A. Rabinovich, “Cyclic strength of turbine blades made of cast nickel-based alloys,” Strength Mater. 39 (2), 109–115 (2007).

    Article  Google Scholar 

  4. P. V. Tarasov, A. A. Bybin, and R. R. Nev’yantseva, “Fatigue strength dependency on stripping methods for Ti-TiN ion plasma coating removal from titanium alloy surface,” Vestn. Ufim. Gos. Aviats. Tekh. Univ. 17 (1), 92–97 (2013).

    Google Scholar 

  5. S. A. Muboyadzhyan, “Protective coatings for parts of hot passage of gas turbine engine,” Vse Mater., No. 3, 26–30 (2011).

    Google Scholar 

  6. K. A. Yushchenko, I. S. Malashenko, A. V. Yarovitsyn, T. N. Kushnareva, Yu. V. Gusev, and I. A. Petrik, “Analysis of failure and shortening of lifetime of turbine blades with protective coatings,” Vib. Tekh. Tekhnol., No. 1, 117–124 (2015).

    Google Scholar 

  7. A. N. Kotel’nikov and I. G. Gabov, “Fatigue evaluation of rotating compressor blades under the conditions of irregular loading,” Fundam. Issled., No. 9, Part 3, 470–475 (2015).

    Google Scholar 

  8. A. D. Mingazhev, A. V. Novikov, N. K. Krioni, and R. R. Bekishev, “Protective coating for steam turbine blades,” Neftegaz. Delo, No. 4, 257–278 (2014).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Moscow Power Engineering Institute (MPEI National Research University), ul. Krasnokazarmennaya 14, Moscow, 111250, Russia

    G. V. Kachalin, A. F. Mednikov & A. B. Tkhabisimov

  2. Kaluga Turbine Plant, ul. Moskovskaya 241, Kaluga, 248010, Russia

    D. A. Arkad’ev, S. G. Temkin & N. A. Senina

Authors
  1. G. V. Kachalin
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. F. Mednikov
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. B. Tkhabisimov
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. D. A. Arkad’ev
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. S. G. Temkin
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. N. A. Senina
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to A. F. Mednikov.

Additional information

Original Russian Text © G.V. Kachalin, A.F. Mednikov, A.B. Tkhabisimov, D.A. Arkad’ev, S.G. Temkin, N.A. Senina, 2016, published in Teploenergetika.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Kachalin, G.V., Mednikov, A.F., Tkhabisimov, A.B. et al. Fatigue test results of the rotating steel blades of steam turbine K-25-0.6 GEO with ion-plasma coating. Therm. Eng. 63, 848–851 (2016). https://doi.org/10.1134/S004060151612003X

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S004060151612003X

Keywords

Search

Navigation