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Nitrogen alloying of the 12% Cr martensitic-ferritic steel

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Abstract

The influence of the nitrogen content on the structure and mechanical properties of heat and corrosion resistant 12% Cr martensitic-ferritic steel developed at the Central Research Institute of Structural Materials Prometey has been studied. Steel containing 0.061 wt % nitrogen possesses a high level of mechanical properties. The decrease in the nitrogen content to 0.017 wt % leads to an increase of structurally free ferrite fraction in the steel, a decrease in the density of dislocations, a decrease of structural dispersity and the absence of finely dispersed precipitates of niobium and vanadium nitrides and carbides. As a result, there is a decrease in the strength properties, especially in the heat resistance.

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Authors and Affiliations

  1. Central Research Institute of Structural Materials Prometey, ul. Shpalernaya 49, St. Petersburg, 191015, Russia

    A. S. Kudryavtsev, D. A. Artem’eva & M. S. Mikhailov

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  1. A. S. Kudryavtsev
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  2. D. A. Artem’eva
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  3. M. S. Mikhailov
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Correspondence to A. S. Kudryavtsev.

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Original Russian Text © A.S. Kudryavtsev, D.A. Artem’eva, M.S. Mikhailov, 2017, published in Fizika Metallov i Metallovedenie, 2017, Vol. 118, No. 8, pp. 829–835.

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Kudryavtsev, A.S., Artem’eva, D.A. & Mikhailov, M.S. Nitrogen alloying of the 12% Cr martensitic-ferritic steel. Phys. Metals Metallogr. 118, 788–794 (2017). https://doi.org/10.1134/S0031918X17080087

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  • DOI: https://doi.org/10.1134/S0031918X17080087

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