Increasing the properties of structural ferrite-pearlite steels

Authors

  • Юрий Александрович Бубликов National Metallurgical Academy of Ukraine Gagarina 4, Dnepropetrovsk, Ukraine, 49005, Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2014.33442

Keywords:

structural steels, ferrite-pearlite structure, yield point, carbonitride hardening, microalloying

Abstract

We have studied the ways of increasing the durability of low-alloy structural ferrite-pearlite steels and researched their possible effective use in a grade composition. The statistic processing of an array of industrial smelts has proved possible increasing of the durability owing to both solid-solution strengthening of ferrite and, to a greater extent, dispersive and grain-boundary strengthening.

The suggested way of increasing the durability of low-alloy steels is based on the mechanism of carbonitride hardening through a complex steel microalloying with nitrogen alongside nitride-forming titanium and aluminum, instead of vanadium. Owing to nanodispersive carbonitride phases, such microalloying provides a fine grain microstructure of rolling and heat-treated cast and secures a high level of durability.

The research has proved that the forming of nanodispersive carbonitride phases requires optimal correlation of nitrogen (0.012-0.015 percent by mass for cast steels and 0.014-0.020 percent by mass for heat-deformed steels) and the suggested microalloying elements (titanium—0.015-0.025 percent by mass and aluminum—0.015-0.025 percent by mass).

Author Biography

Юрий Александрович Бубликов, National Metallurgical Academy of Ukraine Gagarina 4, Dnepropetrovsk, Ukraine, 49005

Associate professor, Candidate of technical science

The department electrometallurgy

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Published

2014-12-15

How to Cite

Бубликов, Ю. А. (2014). Increasing the properties of structural ferrite-pearlite steels. Eastern-European Journal of Enterprise Technologies, 6(11(72), 50–58. https://doi.org/10.15587/1729-4061.2014.33442

Issue

Vol. 6 No. 11(72) (2014): Materials Science

Section

Materials Science

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Copyright (c) 2014 Юрий Александрович Бубликов

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