Study of the Effect of Composition and Thermal Deformation Treatment on Properties of Ferritic Steels Microalloyed with Titanium and Niobium. Part 2. Phase Precipitate Characteristics*

被引：7

作者：

Koldaev, A., V ^{[1
]}

Zaitsev, A., I ^{[1
]}

Krasnyanskaya, I. A. ^{[1
]}

D'yakonov, D. L. ^{[1
]}

机构：

[1] FGUP IP Bardin TsNIIchermet, Moscow, Russia

来源：

METALLURGIST | 2019年 / 63卷 / 5-6期

基金：

俄罗斯科学基金会;

关键词：

ferritic automotive sheet steels; phase precipitates; strength; plasticity; microstructure; transmission electron microscopy; precipitation hardening; acicular ferrite; STRENGTH STEEL; MICROSTRUCTURE;

D O I：

10.1007/s11015-019-00866-z

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of composition and thermal deformation treatment parameters (temperature for the end of rolling and strip winding on a coil, cooling rate after rolling) on mechanical properties, microstructure, and characteristics of precipitates (type, amount, size, morphology, distribution) in advanced ferritic automotive sheet steels is studied. It is demonstrated for the first time that these steels make it possible to obtain simultaneously high strength, ductility and formability due to a homogeneous fine ferritic microstructure additionally strengthened by volumetric system of nano-sized carbide precipitates. It is shown that the contribution to steel strengthening due to the formation of phase precipitates can reach significant values of more than 300 MPa. The main features of phase precipitate, microstructure, and property formation of ferritic steels are established.

引用

页码：604 / 616

页数：13

共 16 条

[1] Contribution of interphase precipitation on yield strength in thermomechanically simulated Ti-Nb and Ti-Nb-Mo microalloyed steels [J].