Microstructure and Mechanical Properties of Martensitic High-Strength Engineering Steel

被引：6

作者：

Maisuradze, M. V. ^{[1
]}

Ryzhkov, M. A. ^{[1
]}

Lebedev, D. I. ^{[1
,2
]}

机构：

[1] FGAOU VO BN Yeltsin Ural Fed Univ, Ekaterinburg, Russia

[2] Russian Acad Sci, MN Mikheev Inst Met Phys, Ural Sect, Ekaterinburg, Russia

来源：

METALLURGIST | 2020年 / 64卷 / 7-8期

关键词：

steel; martensite; bainite; microstructure; mechanical properties; strength; ductility; impact strength; heat treatment; BAINITE TRANSFORMATION; SUPERCOOLED AUSTENITE; M-S; PHASE;

D O I：

10.1007/s11015-020-01040-6

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A promising martensitic steel with good hardenability is studied. In the cooling rate range 0.1-30 degrees C/sec and the only transformation recorded by a dilatometer starts at an M-s temperature of 355 +/- 10 degrees 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 degrees C/sec), austempering at 280-380 degrees C, and oil quenching and tempering at 200-600 degrees 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.

引用

页码：640 / 651

页数：12

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