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Bainitic transformation during the two-step quenching and partitioning process in a medium carbon steel containing silicon

机译:含硅的中碳钢在两步淬火和分配过程中的贝氏体转变

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摘要

A study of 40SiMnNiCr steel subjected to a two-step quenching and partitioning process (Q&P) is presented. The result suggests that strength variation of Q&P steels during the two-step Q&P process was a cumulative effect of increase of retained austenite fraction, decrease of carbon supersaturation of virgin martensite, and particularly much of lower bainite formation. A trade-off between high strength and good ductility of two-step Q&P steels can be tailored and adjusted by controlling lower bainite fraction. The final amount of austenite was influenced by the transformation kinetics of lower bainite during the partitioning process.
机译:提出了对40SiMnNiCr钢进行两步淬火和分配过程(Q&P)的研究。结果表明,Q&P钢在两步Q&P过程中的强度变化是累积的奥氏体分数增加,原始马氏体的碳过饱和度降低,尤其是许多下部贝氏体形成的累积效应。通过控制较低的贝氏体含量,可以定制和调整两步Q&P钢的高强度和良好延展性之间的权衡。在分配过程中,奥氏体的最终量受下贝氏体转变动力学的影响。

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  • 来源
    《Materials Science and Engineering》 |2010年第23期|p.6255-6259|共5页
  • 作者单位

    School of Materials Science and Engineering, Shanghai jiao Tong University, Shanghai 200240, China;

    rnSchool of Materials Science and Engineering, Shanghai jiao Tong University, Shanghai 200240, China;

    School of Materials Science and Engineering, Shanghai University, Shanghai 200240, China;

    rnSchool of Materials Science and Engineering, Shanghai University, Shanghai 200240, China;

    rnSchool of Materials Science and Engineering, Shanghai jiao Tong University, Shanghai 200240, China;

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

    quenching and partitioning; martensite; retained austenite; lower bainite;

    机译:淬灭和分配;马氏体残余奥氏体下贝氏体;

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