Influence of isothermal bainitic processing on the mechanical properties and microstructure characterization of TRIP steel

查看全文 作　　者：Haitao Jiang Hubin Wu Di Tang Qiang [1]Liu

机构地区：[1]National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Journal of University of Science and Technology Beijing》索引2008年第15卷第5期,共6页

摘　　要：The mechanical properties of transformation induced plasticity (TRIP) steel are strongly affected by the conditions of iso-thermal bainitic processing. The multiphase microstructure of TRIP steel under different conditions of isothermal bainitic processing was investigated using OM,SEM,XRD and TEM. The volume fraction of retained austenite and the carbon content in austenite were determined quantitatively using X-ray diffraction patterns. The relationship between mechanical properties and isothermal bainitic processing parameters was investigated. The stability of retained austenite was analyzed by the volume fraction of retained austenite and the carbon content in retained austenite. The experimental results show that the multiphase microstructure consists of ferrite,bainite and metastable retained austenite.To obtain good mechanical properties,the optimal conditions of isothermal bainitic tem-perature and holding time are 410-430°C and 180-240 s,respectively. After isothermal bainitic processing under the optimal condi-tions,the corresponding volume fraction of retained austenite is 5vol%-15vol%,which can provide enough retained austenite and plastic stability for austenite with high carbon content. 关键词：塑性力学钢等温线贝氏体机械力学

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Influence of isothermal bainitic processing on the mechanical properties and microstructure characterization of TRIP steel

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