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Defects In The In Situ Synthesized Tib_2/Fe Composite Coatings During PTA Process

机译:PTA过程中原位合成的Tib_2 / Fe复合涂层的缺陷

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摘要

The in situ synthesized TiB_2/Fe composite coatings were deposited by the plasma transferred-arc (PTA) powder surfacing process. The macro and micro defects in the TiB_2/Fe composite coatings were investigated in this paper. It is found that heat input plays an important role in macro defects in the coatings. Only when the energy density and total heat input are appropriate will nice forming with few macro defects be obtained. As micro defects in the coatings, slag inclusions (C, AI_2O_3) and cracks often appear together. And it is found that slag inclusions and cracks tend to appear with a low dilution rate of the coatings, and their tendency decreases as the dilution rate increases.
机译:原位合成的TiB_2 / Fe复合涂层是通过等离子转移弧(PTA)粉末堆焊工艺沉积的。本文研究了TiB_2 / Fe复合涂层的宏观和微观缺陷。发现热量输入在涂层的宏观缺陷中起重要作用。只有在能量密度和总热量输入合适的情况下,才能获得良好的成形工艺,且几乎没有宏观缺陷。由于涂层中的微缺陷,夹杂物(C,Al_2O_3)和裂纹经常同时出现。并且发现,随着涂层稀释率的降低,炉渣夹杂物和裂纹趋向于出现,并且随着稀释率的增加它们的趋势降低。

著录项

  • 来源
    《Applied Surface Science》 |2011年第23期|p.10119-10125|共7页
  • 作者单位

    School of Material Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Material Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Material Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Material Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Material Science and Engineering, Tianjin University, Tianjin 300072, China;

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

    Plasma transferred-arc; TiB_2; Defects; Surface forming; Slag inclusions; Cracks;

    机译:等离子体电弧;TiB_2;缺陷;表面形成;夹渣;裂纹;

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