Effect of microcontent Nb in solution on the strength of low carbon steels

被引：50

作者：

Yu, QB ^{[1
]}

Wang, ZD ^{[1
]}

Liu, XH ^{[1
]}

Wang, GD ^{[1
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling & Automat 11, Shenyang 110004, Liaoning, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 379卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

solution Nb; ferrite grain; nucleation rate; recrystallization;

D O I：

10.1016/j.msea.2004.03.022

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Two low carbon steels were hot rolled by thermo-mechanical process (TMCP), and one contains niobium (0.013%), and another does not contain niobium. By the comparison of tested results, it can be found that the yield strength of Nb steel is 55 MPa higher than that of Nb free steel on an average. In addition, the ferrite grain of Nb steel is finer than that of Nb free steel under the same finishing temperature, cooling rate, and final temperature. However, there are no Nb(C,N) particles to precipitate from austenite and ferrite by the observation of transmission electron microscopy (TEM). It can be concluded by theoretical analysis that both the increase of strength and the refinement of ferrite grain of Nb steel result from solid solution Nb atoms. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：384 / 390

页数：7

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