Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (4): 309-314.DOI: 10.11890/1006-7191-114-309

• 研究论文 • 上一篇    下一篇

两种电火花表面强化镍基合金涂层的成形与性能研究

张平1,马琳2,梁志杰1,赵军军3   

  1. 1. 装甲兵工程学院
    2. 防化指挥工程学院
    3. 装甲兵工程学院装备再制造工程系；装甲兵工程学院装备再制造国防科技重点实验室
  • 收稿日期:2010-08-09 修回日期:2010-12-07 出版日期:2011-08-25 发布日期:2011-08-18
  • 通讯作者: 马琳

Preparation and mechanical properties of two nickel base alloy coatings achieved by electrospark deposition

Ping ZHANG1, Lin MA1,2, Zhijie LIANG1,Junjun ZHAO1   

  1. 1. Technology and Science Laboratory on Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China
    2. Institute of Chemical Defense Engineering, Beijing 102205, China
  • Received:2010-08-09 Revised:2010-12-07 Online:2011-08-25 Published:2011-08-18
  • Contact: Lin MA

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摘要： 利用电火花表面强化技术在45钢基体表面分别制备Ni818和Ni398两种镍基合金涂层。对涂层的成形性、硬度、耐磨性进行分析测量，并通过能谱仪和金相显微镜对涂层成分和显微结构进行分析。结果表明Ni398电极的工艺成形窗口要远大于Ni818电极。但是，Ni818合金涂层在厚度、硬度及耐磨性等方面均优于Ni398涂层。特别是Ni818合金涂层的磨损量仅为45钢基体的1/6，Ni398涂层的1/3。化学成分的分析结果表明Ni818中，Mo元素的添加使得促进了晶粒的细化。金相分析的结果表明Ni398涂层内的熔滴平均厚度为20～40μm ，贰Ni818合金涂层的熔滴则非常扁平，平均厚度约为 5～20μm。

关键词: 电火花表面强化, 镍基合金, 涂层性能

Abstract: Ni398 and Ni818 base alloy coatings were deposited on 1045 steel by electrospark deposition technique (ESD). Forming properties, thickness, microhardness and wear resistance of the coatings were investigated. The chemical composition and cross-section morphology were analyzed through energy dispersive spectrum (EDS) and metalloscope. The results show that the technological parameter window of Ni398 is larger than that of Ni818 electrode. However, other properties of the Ni818 coating, such as thickness and microhardness, were better than those of the Ni398 coating. Especially the wornout volume of Ni818 coating is only 1/6 of that for 1045 steel and 1/3 for Ni398 coating. Chemical composition analysis indicated that the addition of Mo promoted grain refinement of nickel alloy. Metallographic analysis shows that the molten droplets of Ni398 coatings have an average structure thickness of 20-40 μm while the microstructure of Ni818 coatings is flat with width of 5-20 μm.

Key words: Electrospark deposition, Nickel base alloy electrode, Coating property

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