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Structural Features of Structural Steels Microalloyed with Nitrogen and Vanadium

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Results are presented for a study of medium-carbon structural steels for the effect of microalloying with nitrogen, vanadium, and other nitride-forming elements on the microstructure and processes of nitride formation after hardening with tempering and rolling. The level of mechanical properties is compared after different treatment. It is shown that a lower bainite structure forms with high dislocation density after rolling and cooling steel to 550°C. Within ferrite plates there is precipitation of finely dispersed densely located vanadium carbonitride. Strength as a result of good dispersion of the fine lower bainite structure, high dislocation density, and dispersion strengthening with precipitation of nanosize carbonitride phase, provides a high level of mechanical properties after rolling and cooling to 550°C, comparable with the level of properties after hardening and tempering.

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This work was carried out with financial support UrO RAN directed fundamental research projects (grant No. 13-3-029 UZTM).

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Authors and Affiliations

  1. Institute of Metallurgy, Ural Section, Russian Academy of Sciences, Ural Institute of Metals, Ekaterinburg, Russia

    L. M. Panfilova & L. A. Smirnov

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  1. L. M. Panfilova
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  2. L. A. Smirnov
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Correspondence to L. M. Panfilova.

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Translated from Metallurg, No. 10, pp. 77–80, October, 2014.

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Panfilova, L.M., Smirnov, L.A. Structural Features of Structural Steels Microalloyed with Nitrogen and Vanadium. Metallurgist 58, 916–920 (2015). https://doi.org/10.1007/s11015-015-0017-5

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  • DOI: https://doi.org/10.1007/s11015-015-0017-5

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