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Development of an Innovative Digital Cooling Technology (Differential Heat Treatment) for EVRAZ NTMK Rails

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Abstract

TEC-DT differential heat hardening technology is developed based on the process of digital control of air humidity by high-efficiency mixing of air flows and the water ejected by it. The wide-range cooling rate control (2–14°C/s) makes it possible to heat hardened rails made of different steels, such as carbon steels, with a wide range of carbon content, and microalloyed and alloyed steels, while achieving the level of properties required for rails of both general and special purposes (low-temperature reliability and increased wear resistance). The rails, differentially hardened by reheating, have a highly dispersed pearlite structure, and a high level of ductility, impact strength, fatigue strength, and survivability.

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REFERENCES

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Authors and Affiliations

  1. EVRAZ NTMK, Nizhny Tagil, Russia

    A. V. Kushnarev, A. A. Kirichkov & E. V. Belokurova

  2. Ural Institute of Metals, Ekaterinburg, Russia

    L. A. Smirnov & A. B. Dobuzhskaya

  3. SME Tomsk Electronic Company, Tomsk, Russia

    S. V. Khlyst, V. M. Kuzmichenko, I. S. Khlyst & A. V. Gontar’

  4. Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia

    L. A. Smirnov

Authors
  1. A. V. Kushnarev
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  2. L. A. Smirnov
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  3. A. A. Kirichkov
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  4. A. B. Dobuzhskaya
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  5. S. V. Khlyst
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  6. V. M. Kuzmichenko
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  7. I. S. Khlyst
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  8. A. V. Gontar’
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  9. E. V. Belokurova
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Corresponding author

Correspondence to A. B. Dobuzhskaya.

Additional information

Translated by O. Pismenov

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Kushnarev, A.V., Smirnov, L.A., Kirichkov, A.A. et al. Development of an Innovative Digital Cooling Technology (Differential Heat Treatment) for EVRAZ NTMK Rails. Steel Transl. 50, 415–419 (2020). https://doi.org/10.3103/S0967091220060042

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  • DOI: https://doi.org/10.3103/S0967091220060042

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