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Metallurgist
Published in: Metallurgist 7-8/2020

12-11-2020

Microstructure and Mechanical Properties of Martensitic High-Strength Engineering Steel

Authors: M. V. Maisuradze, M. A. Ryzhkov, D. I. Lebedev

Published in: Metallurgist | Issue 7-8/2020

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Abstract

A promising martensitic steel with good hardenability is studied. In the cooling rate range 0.1–30°C/sec and the only transformation recorded by a dilatometer starts at an Ms temperature of 355 ± 10°C. Microstructure and mechanical properties of the steel studied are analyzed after various heat treatment regimes: cooling from the austenitizing temperature at various rates (from 0.02 to 20°C/sec), austempering at 280–380°C, and oil quenching and tempering at 200–600°C. It is shown that a 1000-fold change in the cooling rate has a weak effect on steel strength. Bainitic transformation in the steel in question occurs in the martensitic transformation temperature range, which leads to a reduction in impact strength compared with a martensitic microstructure both after slow cooling and isothermal hardening.
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Metadata
Title
Microstructure and Mechanical Properties of Martensitic High-Strength Engineering Steel
Authors
M. V. Maisuradze
M. A. Ryzhkov
D. I. Lebedev
Publication date
12-11-2020
Publisher
Springer US
Published in
Metallurgist / Issue 7-8/2020
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-020-01040-6

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