Advertisement

Materials Science

, Volume 54, Issue 6, pp 776–782 | Cite as

Influence of the Modes of Heat Treatment on the Strength and Cyclic Crack-Growth Resistance of 65G Steel

  • О. P. OstashEmail author
  • V. V. Kulyk
  • V. D. Poznyakov
  • О. А. Gaivorons’kyi
  • V. V. Vira
Article
  • 5 Downloads

To find the ways of increasing the brittle-fracture resistance of the metal in the heat-affected zone formed as a result of repair surfacing of the rolling surface of railroad wheels, we study the influence of various modes of heat treatment, including the traditional and modified (by the authors) Q-n-Ptreatments on the mechanical properties of 65G steel regarded as a model wheel steel. It is shown that, after the modified Q-n-P-treatment, the mechanical characteristics of steel increase to a greater extent than after the traditional treatment. However, according to the parameter of structural strength P = [ΔU · ΔKth · ΔKfc ], where ΔU is the ultimate strength, ΔKth is the fatigue threshold, and ΔKfc is the cyclic fracture toughness of the material, the mode of treatment proposed earlier, which leads to the relaxation of stresses of the second kind in the bulk of martensite and bainite lathes, proves to be more efficient.

Keywords

high-strength steel bainite–martensite structure deformation martensite transformation internal stresses of the second kind strength cyclic crack-growth resistance 

References

  1. 1.
    DSTU GOST 10791-2016. Solid-Rolled Wheels. Technical Specifications [in Ukrainian] (2016).Google Scholar
  2. 2.
    AAR Manual of Standards and Recommended Practices Wheels and Axles. M-107/M-208-2011. Wheels, Carbon Steel. Specification (2011).Google Scholar
  3. 3.
    O. P. Ostash, V. H. Anofriev, I. M. Andreiko, L. A. Muradyan, and V. V. Kulyk, “On the concept of selection of steels for high-strength railroad wheels,” Fiz.-Khim. Mekh. Mater.,48, No. 6, 7–13 (2012); English translation:Mater. Sci.,48, No. 6, 697–703 (2013).CrossRefGoogle Scholar
  4. 4.
    A. А. Gaivoronskii, V. D. Poznyakov, V. А. Sarzhevskii, V. G. Vasil’ev, and V. Yu. Orlovskii, “Influence of the thermal deformation cycle of surfacing on the structure and properties of railroad wheels of elevated strength in the course of their restoration,” Avtomat. Svarka, No. 5, 22–26 (2010).Google Scholar
  5. 5.
    O. А. Haivorons’kyi, V. D. Poznyakov, L. І. Markashova, О. P. Ostash, V. V. Kulyk, Т. О. Alekseenko, and О. S. Shyshkevych, “Structure and mechanical properties of the heat-affected zone of restored railway wheels,” Fiz.-Khim. Mekh. Mater.,51, No. 4, 114−119 (2015); English translation:Mater. Sci.,51, No. 4, 563–569 (2016).Google Scholar
  6. 6.
    О. P. Ostash, O. А. Haivorons’kyi, V. D. Poznyakov, and V. V. Kulyk, A Method of Thermal Treatment of High-Strength Low- Alloyed Carbon Steels [in Ukrainian], Patent of Ukraine No. 105440, Publ. on 25.03.2016, Bull. No. 6.Google Scholar
  7. 7.
    J. Speer, D. K. Matlock, B. C. De Cooman, and J. G. Schroth, “Carbon partitioning into austenite after martensite transformation,” Acta Mater.,51, 2611–2622 (2003).CrossRefGoogle Scholar
  8. 8.
    D. V. Edmonds, K. He, F. C. Rizzo, B. C. De Cooman, D. K. Matlock, and J. G. Speer, “Quenching and partitioning martensite —A novel steel heat treatment,” Mater. Sci. Eng.: A,438440, 25–34 (2006).CrossRefGoogle Scholar
  9. 9.
    T. Y. Hsu, X. J. Jin, and Y. H. Rong, “Strengthening and toughening mechanisms of quenching-partitioning-tempering (Q–P–T) steels,” J. Alloys Comp.,577S, 568–571 (2013).Google Scholar
  10. 10.
    H. Jirková, B. Masek, M. F.-X. Wagner, D. Langmajerová, L. Kucerová, R. Treml, and D. Kiener, “Influence of metastable retained austenite on macro and micromechanical properties of steel processed by the Q&P process,” J. Alloys Comp.,615, 163–168 (2014).CrossRefGoogle Scholar
  11. 11.
    S. G. Liu, S. S. Dong, and F. Yang, “Application of quenching-partitioning-tempering process and modification to a newly designed ultrahigh carbon steel,” Mater. Design.,56, 37–43 (2014).CrossRefGoogle Scholar
  12. 12.
    V. G. Efremenko, V. I. Zurnadzhi, Yu. G. Chabak, O. V. Tsvetkova, and A. V. Dzherenova, “Application of the Q-n-P-treatment for increasing the wear resistance of low-alloy steel with 0.75% C,” Fiz.-Khim. Mekh. Mater.,53, No. 1, 61–68 (2017); English translation:Mater. Sci.,53, No. 1, 67–75 (2017).Google Scholar
  13. 13.
    V. V. Panasyuk (editor), Fracture Mechanics and Strength of Materials: A Handbook, Vol. 15: O. P. Ostash, Structure of Materials and Fatigue Life of Structural Elements [in Ukrainian], Spolom, Lviv (2015).Google Scholar
  14. 14.
    L. Akselrud and Y. Grin, “WinCSD: software package for crystallographic calculations (Version 4),” J. Appl. Crystallogr.,47, 803–805 (2014).CrossRefGoogle Scholar
  15. 15.
    Test Method for Measurement of Fatigue Crack Growth Rates. ASTM Standard E647-99 (1999).Google Scholar
  16. 16.
    E. De Moor, S. Lacroix, A. J. Clarke, J. Penning, and J. G. Speer, “Effect of retained austenite stabilized via quench and partitioning on the strain hardening of martensitic steels,” Metallurg. Mater. Trans.: A,39, 2586–2595 (2008).Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • О. P. Ostash
    • 1
    Email author
  • V. V. Kulyk
    • 2
  • V. D. Poznyakov
    • 3
  • О. А. Gaivorons’kyi
    • 3
  • V. V. Vira
    • 2
  1. 1.Karpenko Physicomechanical InstituteUkrainian National Academy of SciencesLvivUkraine
  2. 2.“L’vivs’ka Politekhnika” National UniversityLvivUkraine
  3. 3.Paton Institute of Electric WeldingUkrainian National Academy of SciencesKyivUkraine

Personalised recommendations