Effect of hot rolled microstructure on mechanical properties of high strength cold rolled TRIP steel

被引：0
作者：
Wang, Chao [1 ]
Ding, Hua [1 ,2 ]
Zhang, Jun [1 ]
机构：
[1] School of Materials & Metallurgy, Northeastern University, Shenyang
[2] State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2015年 / 36卷 / 03期
关键词：
Heat treatment; Hot rolled; Mechanical properties; Microstructure; TRIP steel;
D O I：
10.3969/j.issn.1005-3026.2015.03.013
中图分类号：
学科分类号：
摘要：
The effect of hot rolled microstructure on the final microstructure and mechanical properties of the cold rolled TRIP steel containing Al was investigated by means of scanning electron microscope (SEM), X-ray-diffraction (XRD) and tensile test. Three different kinds of microstructure, fine grains F+B+P, F+P and F+B, were obtained under different cooling processes. After heat treatment, the fine grains sample contained granular bainite and a few retained austenite. The tensile strength of the sample was 996 MPa and the elongation was 20.8%. The microstructure of other two samples was polygonal ferrite, granular bainite and some retained austenite. The elongation reached up to 29.4% and the strength-ductility balance of 26 812.8 MPa·% were obtained for F+B sample. The band structure of F+P sample was hard to eliminate after heat treating, which was harmful to final mechanical properties. ©, 2015, Northeastern University. All right reserved.
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页码：359 / 363
页数：4
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