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K. V. Makhneva, I. B. Kinzin, M. A. Shabanov, O. V. Selivanova, V. A. Khotinov

EFFECT OF TEMPERING CONDITIONS ON THE STRUCTURE AND STRENGTH PROPERTIES OF STRUCTURAL STEELS

DOI: 10.17804/2410-9908.2024.1.006-010

The structure and mechanical properties of low- and medium-carbon steels quenched and tempered with different isothermal holding times at temperatures ranging from 250 to 650 °C are studied. It is shown that, for the steels under study, three stages can be distinguished on the curves of hardness as a function of isothermal holding at different temperatures. Hardness testing is used to determine tempering conditions leading to a comparable level of hardness. To calculate the tempering parameter, the constant C in the Hollomon–Jaffe equation is determined for the steels in question.

Acknowledgments: The work financially supported by the Ministry of Science and Higher Education of the Rus-sian Federation (the Ural Federal University Development Program within the framework of the Priority 2030 program). The equipment of the UrFU’s shared research facilities was used in the testing.

Keywords: steel, quenching, martensite, tempering parameter, hardness, dislocation density, carbides

References:

  1. Skorokhodov, V.N., Odessky, P.D., and Rudchenko, A.V. Konstruktsionnaya stal [Structural Steel]. Metallurgizdat Publ., Moscow, 2002, 622 p. (In Russian).
  2. Technologie der Wärmebehandlung von Stahl, VEB Deutscher Verlag für Grundstoffindustrie, Leipzig, 1976. (In German).
  3. Zhang, Y., Yang, J., Xiao, D., Luo, D., Tuo, C., and Wu, H. Effect of quenching and tempering on mechanical properties and impact fracture behavior of low-carbon low-alloy steel. Metals, 2022, 12 (7), 1087. DOI: 10.3390/met12071087.
  4. Ju, Y., Goodall, A., Strangwood, M., and Davis, C. Characterization of precipitation and carbide coarsening in low carbon low alloy Q&T steels during the early stages of tempering. Materials Science and Engineering: A, 2018, 738, 174–189. DOI: 10.1016/j.msea.2018.09.044.


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Article reference

Effect of Tempering Conditions on the Structure and Strength Properties of Structural Steels / K. V. Makhneva, I. B. Kinzin, M. A. Shabanov, O. V. Selivanova, V. A. Khotinov // Diagnostics, Resource and Mechanics of materials and structures. - 2024. - Iss. 1. - P. 6-10. -
DOI: 10.17804/2410-9908.2024.1.006-010. -
URL: http://eng.dream-journal.org/issues/2024-1/2024-1_430.html
(accessed: 05/22/2024).

 

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Founder:  Institute of Engineering Science, Russian Academy of Sciences (Ural Branch)
Chief Editor:  S.V. Smirnov
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