Microstructure and Mechanical Properties of Martensitic High-Strength Engineering Steel

被引：0
作者：
M. V. Maisuradze
M. A. Ryzhkov
D. I. Lebedev
机构：
[1] FGAOU VO B. N. Yel’tsin Ural Federal University,
[2] M. N. Mikheev Institute of Metal Physics,undefined
[3] Ural Section of the Russian Academy of Sciences,undefined
来源：
Metallurgist | 2020年 / 64卷
关键词：
steel; martensite; bainite; microstructure; mechanical properties; strength; ductility; impact strength; heat treatment;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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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页码：640 / 651
页数：11
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