Microstructure and Mechanical Properties of Hot Rolled Low Silicon TRIP Steel Containing Phosphorus and Vanadium

钢铁研究学报(英文版), 2011, 18(11): 40-45.

Microstructure and Mechanical Properties of Hot Rolled Low Silicon TRIP Steel Containing Phosphorus and Vanadium

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1.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China

2.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China

3.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China

4.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China

基金项目: National Natural Science Foundation of China(50734001;51174059;50971039) Fundamental Research Funds for Central Universities of China(N090407001)

关键词： TRIP钢 , 微观结构 , 力学性能 , 含磷 , 低硅 , 热轧 , 铁素体晶粒 , 残余奥氏体

Microstructure and Mechanical Properties of Hot Rolled Low Silicon TRIP Steel Containing Phosphorus and Vanadium

Keywords： hot rolling , low silicons TRIP steel , phosphorus , vanadium , EBSD , precipitation ,

The microstructure characteristics and mechanical properties of a low-silicon TRIP steel containing phosphorus and vanadium at different finish rolling temperatures were studied by laboratory hot rolling experiments. Dif- ferent ratios of multiphase microstructure （ferrite, granular bainite and retained austenite） are obtained. With a decrease in finish rolling temperature, the volume fractions of ferrite and retained austenite increase. EBSD analysis re veals that most of the ferrite grains are fine, and decreasing of finish rolling temperature leads to an increase in low angle boundaries. Under the joint effects of fine grain strengthening, dislocation strengthening and precipitation strengthening, higher strength is obtained. When the finish rolling temperature is decreased to 800 ℃, the steel has excellent mechanical properties： Rp0.2 =470 MPa; Rm=960 MPa; Rp0. 2/Rm=0. 49; A50 =19.7%; n=0. 25.

参考文献

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Microstructure and Mechanical Properties of Hot Rolled Low Silicon TRIP Steel Containing Phosphorus and Vanadium

Microstructure and Mechanical Properties of Hot Rolled Low Silicon TRIP Steel Containing Phosphorus and Vanadium

参考文献