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Variations of microstructure and properties of 690 MPa grade low carbon bainitic steel after tempering

机译：回火后690 MPa级低碳贝氏体钢的组织和性能变化

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摘要

The variations of microstructure, mechanical properties and electrical resistivity of 690 MPa grade low carbon bainitic steel tempered at different temperatures were investigated with Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and double-arm Bridge. The results show that the appearance of granular bainite, decomposition of retained austenite, variations of dislocation density and solid solution of microalloying elements are the main reasons for variations of mechanical properties and electrical resistivity. Electrical resistivity reflects the solution content of microalloying elements and variations of dislocation density, which can be used as a fast and effective way to analyze the microstructure of materials.
机译：利用扫描电子显微镜（SEM），透射电子显微镜（TEM）和双臂桥研究了在不同温度下回火的690 MPa级低碳贝氏体钢的组织，力学性能和电阻率的变化。结果表明，颗粒状贝氏体的出现，残余奥氏体的分解，位错密度的变化和微合金元素的固溶是导致力学性能和电阻率变化的主要原因。电阻率反映了微合金元素的固溶含量和位错密度的变化，可作为一种快速有效的方法来分析材料的微观结构。

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  • 来源
    《Materials Science and Engineering》 |2012年第15期|p.205-210|共6页
  • 作者

    Rui Feng; Shengli Li; Zhenshun Li; Lei Tian;

  • 作者单位

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan Shandong 250061, PR China,School of Materials Science and Engineering, Shandong University, Jinan Shandong 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan Shandong 250061, PR China,School of Materials Science and Engineering, Shandong University, Jinan Shandong 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan Shandong 250061, PR China,School of Materials Science and Engineering, Shandong University, Jinan Shandong 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan Shandong 250061, PR China,School of Materials Science and Engineering, Shandong University, Jinan Shandong 250061, PR China;

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  • 正文语种 eng
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  • 关键词

    low carbon bainitic steel; tempering; granular bainite; retained austenite; electrical resistivity;

    机译：低碳贝氏体钢;回火贝氏体残余奥氏体电阻率;

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