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Effect of Pre-Existing Martensite on Bainitic Transformation in Low-Temperature Bainite Steel

机译：预先存在的马氏体对低温贝氏体钢贝氏体转变的影响

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摘要

The effect of different volume fractions of pre-existing martensite on the low-temperature bainitic transformation and microstructures was quantitatively analyzed by dilatometer, optical microscope and scanning electron microscope. The results showed that pre-existing martensitic transformation accelerated the subsequent low-temperature bainitic transformation, and the incubation period and completion time of bainitic reaction were significantly shortened. This phenomenon was attributed to the increasing nucleation sites caused by the introduced dislocations in austenite due to the formation of pre-existing martensite. However, it was noteworthy that, because of the increased bainitic plates adjacent to the pre-existing martensitic plates, the probability of the impingement of bainitic plates during growth was increased, which resulted in a decrease in the maximum attainable volume fraction of bainite.
机译：通过膨胀计，光学显微镜和扫描电子显微镜定量分析了不同体积分数的既存马氏体对低温贝氏体相变和组织的影响。结果表明，预先存在的马氏体相变促进了随后的低温贝氏体相变，并显着缩短了贝氏体反应的潜伏期和完成时间。这种现象归因于由于预先存在的马氏体的形成而导致的奥氏体引入的位错引起的形核位点的增加。但是，值得注意的是，由于增加了与先前存在的马氏体板相邻的贝氏体板，因此在生长过程中撞击贝氏体板的可能性增加了，这导致贝氏体的最大可达到体积分数降低。

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  • 来源
    《Materials science forum》 |2017年第1期|803-809|共7页
  • 作者

    Peng Zhou; Hui Guo; Aimin Zhao; Zhukai Yin; Jiaxing Wang;

  • 作者单位

    Institute of Engineering Research, University of Science and Technology Beijing, Beijing, 10083, China,National Engineering Research Center of Advanced Rolling Technology, University of Science and Technology Beijing, Beijing, 100083, China;

    Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing, 10083, China;

    Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing, 10083, China;

    Institute of Engineering Research, University of Science and Technology Beijing, Beijing, 10083, China;

    Institute of Engineering Research, University of Science and Technology Beijing, Beijing, 10083, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Low-temperature bainite; Pre-existing martensite; Phase transformation kinetics; Incubation period;

    机译：低温贝氏体;预先存在的马氏体;相变动力学;潜伏期;

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