Development of high-strength low-carbon steels abroad and in the Russian Federation

Authors: Stepanov E.E., Zhikharev P.Yu.
Published in issue: #1(66)/2022
DOI: 10.18698/2541-8009-2022-1-766
Category: Metallurgy and Science of Materials | Chapter: Metal Science, Thermal Processing of Metals and Alloys
Keywords: microalloying, thermomechanical rolling, alloy steels, high-strength steels, interrupted quenching, wide strip hot rolling mills, temper martensite, precipitation hardening
Published: 18.02.2022

The paper considers the most famous high-strength microalloyed steels with a yield strength of at least 900 MPa from the world’s leading manufacturers of rolled metal. The chemical and phase compositions of these materials and their mechanical characteristics are analyzed. It was revealed that the achievement of a set of properties required by consumers is possible when obtaining various types of microstructures: martensitic, ferritic and bainitic phases are used in high-strength steels of this segment; the mechanism of dispersion strengthening is actively used. To achieve all these types of phase composition, manufacturers resort to the use of thermomechanical rolling. It has been established that the production of materials of this class can potentially be mastered under the conditions of continuous wide-strip hot rolling mills operated in the Russian Federation.

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