Development of Ti-Microalloyed 600 MPa Hot Rolled High Strength Steel

被引：16

作者：

Yi Hai-long ^{[1
]}

Liu Zhen-yu ^{[1
]}

Wang Guo-dong ^{[1
]}

Wu Di ^{[1
]}

机构：

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

来源：

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2010年 / 17卷 / 12期

关键词：

hot rolled high strength steel; TMCP (thermomechanical control process); precipitate; carbide; NB-TI; MICROSTRUCTURE; TOUGHNESS; EVOLUTION; KINETICS; FERRITE;

D O I：

10.1016/S1006-706X(10)60197-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A high strength steel with yield strength on the order of 600 MPa was developed successfully with only addition of titanium alloying element based on a low-carbon steel. The results showed that the hot deformation accelerated ferrite and pearlite transformation and retarded bainite transformation under continuous cooling condition. The microstructure of this steel was mainly composed of fine grained ferrite and carbides distributing along the ferrite grain boundaries. The yield and tensile strengths of steels were about 620-650 MPa and 720-740 MPa, respectively, and the values of strain hardening exponent and plastic strain ratio were 0. 12 and 0. 80, respectively, thereby providing a good combination of strength with toughness. In short, the fine grained ferrite and TiC precipitation strengthening contributed to a high strength.

引用

页码：54 / 64

页数：11

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