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Volume 28 Issue 4
Sep.  2013
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The study of behavior of graphite phase in the laser hardening layer of gray iron

  • 1.

    National Laboratory of Plastic Forming Simulation and Mould Technology, HUST, Wuhan 430074, China

  • Received Date: 2003-08-11
    Accepted Date: 2003-11-20
  • The behavior of graphite phase in the laser hardening layer of gray iron is deeply studied by means of optical microscope and electron probe.Results show that the graphite dissolves completely and diffuses uniformly in the melt layer;the graphite in the phase transformation hardening layer dissolves partly,but the diffusion isn't uniformity;and that the graphite in the transition layer does not dissolve basically. It can be concluded that the behavior of graphite has close relation with the hardening layer structure and the effect of hardening.
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  • [1] 沈莲,李成劳,王秀苓 et al.激光处理对灰铸铁显微组织的影响 [A].全国激光热处理学术会议论文集'88 [C].上海:上海市新闻出版局,1989.42～46.
    [2] 左养秀,刘风琴,张忠.东风4型内燃机柴油机气缸套激光热处理 [A].全国激光热处理学术会议论文集'88 [C].上海:上海市新闻出版局,1989.19～23.
    [3] 姚建华.摩托车汽缸内壁激光处理 [A].全国第六届高能束热处理学术会议论文集 [C].北京:电子工业出版社,1997.36～41.
    [4]

    MOLIAN P A.Fatigue characteristics of laser surface-hardened cast irons [J].J Engineering Materials and Technology,1987,109:179.
    [5] 周卓华.铸造镍基高温合金熔凝、熔覆的开裂行为研究 [D].武汉:华中理工大学,1995.39～40.
    [6] 范雄.X射线金属学 [M].北京:机械工业出版社,1981.96～97.
    [7] 王家金.激光加工技术 [M].北京:中国计量出版社,1992.113～115.
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The study of behavior of graphite phase in the laser hardening layer of gray iron

  • 1. National Laboratory of Plastic Forming Simulation and Mould Technology, HUST, Wuhan 430074, China
  • Received Date: 2003-08-11
  • Accepted Date: 2003-11-20
  • Available Online: 2004-07-25

Abstract: The behavior of graphite phase in the laser hardening layer of gray iron is deeply studied by means of optical microscope and electron probe.Results show that the graphite dissolves completely and diffuses uniformly in the melt layer;the graphite in the phase transformation hardening layer dissolves partly,but the diffusion isn't uniformity;and that the graphite in the transition layer does not dissolve basically. It can be concluded that the behavior of graphite has close relation with the hardening layer structure and the effect of hardening.

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