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首页> 外文期刊>Materials Science and Engineering >Effect of introduced vanadium carbide at the bay region on bainite transformation, microstructure and mechanical properties of high-carbon and high-silicon steel
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Effect of introduced vanadium carbide at the bay region on bainite transformation, microstructure and mechanical properties of high-carbon and high-silicon steel

机译：碳化物钒碳化钒对贝氏体转化，微观结构和高硅钢机械性能的影响

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摘要

Obtaining a fine bainitic ferrite for high carbon steel at low temperature requires a long period. Thus, creating strategies to accelerate bainite transformation is important. This investigation aims to explore the introduction of vanadium carbide at the bay region on bainitic transformation kinetics and mechanical properties by comparing isothermal bainitic transformation treatment directly and in combination with bay treatment prior to bainite transformation. Results show that introduced fine VC precipitation during bay treatment notably accelerates the initial bainite transformation with the incubation period being reduced by 91%. Decrease in activation energy for bainite nucleation at vanadium carbide/austenite interfaces and generation of preferred nucleation sites lead to a favorable acceleration of bainitic formation kinetics. However, indirect refinement of grain size for intragranular bainitic ferrite nucleation and consumption of available vanadium carbide/austenite interfaces result in overall rate of the subsequent bainite transformation. For the sample with prior bay treatment, the lath directions of bainitic ferrite are more complex and the size of block RA is smaller than that of the conventional sample. Moreover, the introduction of vanadium carbide at the bay region can simultaneously enhance the tensile strength and impact toughness of the steel.
机译：在低温下为高碳钢获得精细贝氏体铁氧体需要长时间。因此，创造加速贝氏体转化的策略很重要。本研究旨在通过将等温贝氏体转化处理直接和贝氏体转化前与海湾治疗组合的比较，探讨贝氏体转化动力学和机械性能的贝氏体转化动力学和机械性能的钒碳化钒。结果表明，海湾治疗期间引入的细vc沉淀显着加速了妊娠期孵化期减少了91％的初始贝氏体转化。在碳化钒/奥氏体嵌段中的贝氏体成核的活化能量降低以及优选成核位点的产生导致贝氏体形成动力学的有利加速度。然而，间接细化粒状致牙物质铁氧体成核的晶粒尺寸的细化和可用钒钒/奥氏体界面的消耗导致随后的贝氏体转化的总体速率。对于具有先前海湾处理的样品，贝氏体铁氧体的板条方向更复杂，块Ra的尺寸小于常规样品的尺寸。此外，在海湾区域的碳化钒的引入可以同时增强钢的拉伸强度和冲击韧性。

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  • 来源
    《Materials Science and Engineering》 |2021年第15期|141055.1-141055.9|共9页
  • 作者

    Dongyun Sun; Changbo Liu; Xiaoyan Long; Xiaojie Zhao; Yanguo Li; Bo Lv; Fucheng Zhang; Zhinan Yang;

  • 作者单位

    State Key Laboratory of Metnstable Materials Science and Technology Yanshan University Qinhuangdao 066004 China;

    State Key Laboratory of Metnstable Materials Science and Technology Yanshan University Qinhuangdao 066004 China;

    Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structures of Hebei Province Yanshan University Qinhuangdao 066004 China;

    State Key Laboratory of Metnstable Materials Science and Technology Yanshan University Qinhuangdao 066004 China;

    State Key Laboratory of Metnstable Materials Science and Technology Yanshan University Qinhuangdao 066004 China;

    College of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China;

    State Key Laboratory of Metnstable Materials Science and Technology Yanshan University Qinhuangdao 066004 China National Engineering Research Center for Equipment and Technology of Cold Rolled Strip Yanshan University Qinhuangdao 066004 China;

    National Engineering Research Center for Equipment and Technology of Cold Rolled Strip Yanshan University Qinhuangdao 066004 China;

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

    Bay treatment; Bainite transformation; Nucleation; VC precipitation; Mechanical properties;

    机译：湾治疗;贝氏体转化;成核;VC降水;机械性能;

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