THE SIGNIFICANCE OF RETAINED AUSTENITE IN THE HIGH STRENGTH AND PLASTICITY OF MEDIUM CARBON Q&amp;P STEEL

R. V. Mishnev; Мишнев Р. В.; Y. I. Borisova; Борисова Ю. И.; M. N. Erokhin; Ерохин М. Н.; S. M. Gaidar; Гайдар С. М.; R. O. Kaibyshev; Кайбышев Р. О.

doi:10.31857/S2686740023050097

THE SIGNIFICANCE OF RETAINED AUSTENITE IN THE HIGH STRENGTH AND PLASTICITY OF MEDIUM CARBON Q&P STEEL

Authors: Mishnev R.V.¹^,2, Borisova Y.I.¹^,2, Erokhin M.N.¹, Gaidar S.M.¹, Kaibyshev R.O.¹
Affiliations:
1. Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
2. Belgorod State University
Issue: Vol 512, No 1 (2023)
Pages: 73-77
Section: ТЕХНИЧЕСКИЕ НАУКИ
URL: https://journals.rcsi.science/2686-7400/article/view/232983
DOI: https://doi.org/10.31857/S2686740023050097
EDN: https://elibrary.ru/UPYAUW
ID: 232983

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Abstract
About the authors
References
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Abstract

The Fe–0.44%C–1.8%Si–1.3%Mn–0.82%Cr–0.28%Mo steel treated by the quenching-partitioning process showed a product of strength and elongation of 30 GPa·% with yield stress of 1350 MPa. Such combination of high ultimate tensile strength and good ductility is attributed to a high portion of retained austenite (≥20%) transforming to martensite under tension. The high yield stress is provided by carbon supersaturation of austenite and a high dislocation density in this phase.

Keywords

steel, mechanical properties, microstructure, phase transformation

About the authors

R. V. Mishnev

Russian State Agrarian University – Moscow Timiryazev Agricultural Academy; Belgorod State University

Author for correspondence.
Email: mishnev91@mail.ru
Russia, Moscow; Russia, Belgorod

Y. I. Borisova

Russian State Agrarian University – Moscow Timiryazev Agricultural Academy; Belgorod State University

Email: mishnev91@mail.ru
Russia, Moscow; Russia, Belgorod

M. N. Erokhin

Russian State Agrarian University – Moscow Timiryazev Agricultural Academy

Email: mishnev91@mail.ru
Russia, Moscow

S. M. Gaidar

Russian State Agrarian University – Moscow Timiryazev Agricultural Academy

Email: mishnev91@mail.ru
Russia, Moscow

R. O. Kaibyshev

Russian State Agrarian University – Moscow Timiryazev Agricultural Academy

Email: mishnev91@mail.ru
Russia, Moscow

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