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Mechanical Properties and Microstructures of a Novel Low-carbon High-silicon Martensitic Steel

机译:新型低碳高硅马氏体钢的力学性能和组织

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摘要

A novel low-carbon high-silicon martensitic steel, 22SiMnCrNiMo, whose comprehensive mechanical properties approach the 00Ni18Co9Mo4Ti maraging steel, was investigated. Microstructure characterizations revealed that the steel was composed by lath martensite, retained austenite films and e-carbides after different heat treatment processes. And the 22SiMnCrNiMo steel obtained optimal mechanical properties of a yield strength of 1 261 MPa, a tensile strength of 1 548 MPa, an impact toughness of 120 J/cm~2, a fracture toughness (K_(IC)) of 94.8 MPa·m~(1/2) and a threshold value (∆K_(th)) of 7.1 MPa·m~(1/2) when the steel was austenitised at 900℃ for 1 h followed by water quenched and then tempered at 320℃ for 1 h. The 22SiMnCrNiMo steel exhibited excellent mechanical properties similar to those of the 00Ni18Co9Mo4Ti maraging steel as well as high resistance to fatigue crack initiation and growth.
机译:研究了一种新型的低碳高硅马氏体钢22SiMnCrNiMo,其综合力学性能接近00Ni18Co9Mo4Ti马氏体时效钢。显微组织表征表明,钢是由板条马氏体,残留的奥氏体薄膜和经过不同热处理工艺的碳碳化物组成。 22SiMnCrNiMo钢的最佳力学性能为:屈服强度为1 261 MPa,拉伸强度为1 548 MPa,冲击韧性为120 J / cm〜2,断裂韧性(K_(IC))为94.8 MPa·m。当钢在900℃下奥氏体化1 h,然后水淬然后在320℃回火时,〜(1/2)和阈值(∆K_(th))为7.1 MPa·m〜(1/2)。 1小时22SiMnCrNiMo钢表现出与00Ni18Co9Mo4Ti马氏体时效钢相似的优异机械性能,并具有较高的抗疲劳裂纹萌生和扩展性。

著录项

  • 来源
    《ISIJ international》 |2017年第3期|558-563|共6页
  • 作者单位

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

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

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

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

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    martensitic steel; mechanical properties; fatigue toughness; fatigue crack initiation and growth;

    机译:马氏体钢机械性能疲劳韧性疲劳裂纹萌生与发展;

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