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Volume 28 Issue 6
Sep.  2013
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Laser surface alloying of cast aluminium alloy with Ni and Cr

  • 1.

    Department of Materials Science & Engineering, HUST, Wuhan 430074, China

  • Received Date: 2003-11-11
  • Ni-Cr powder was mixed into paste with a organic binding agent and then painted onto the surface of cast aluminium alloy ZL108 for laser surface alloying using CO2 laser.With optimum process parameters,the allo yed layer with good metallurgical bonding performance is formed.The microstructu re characteristics of alloyed layer are investigated by using OM,SEM,EDAX and XRD.The results show that the alloyed layer is composed of inter-metallic compo unds of Ni-Al,which is some particles dispersed on the substrate of Al-Si mut ual crystal.The micro-hardness of alloyed layer can reach up to 230HV,which was three times higher than that of the substrate materials.The relative wear resi stance is about two times higher than that of the substrate materials.
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  • [1] 袁斌,龚知本,沈书泊 et al.铝硅钛合金表面激光合金化研究[J].应用激光,1999,19(1):4～6.
    [2]

    FU Y Q,BATCHELOR A W,GU Y W et al.Laser alloying of aluminium alloy AA6061 with Ni and Cr(Part 1)——Optimization of processing parameters by X-ray imaging[J].Surface and Coatings Technology,1998,99:287～294.
    [3]

    IBNATIVE M,DUPUY C,SOLA X et al.Laser and electron beam alloying of Al with Fe and Sn[J].Applied Surface Science,1997,109/110:137～142.
    [4] 唐传芳,冯燕武.铝活塞激光表面合金化关键技术研究[J].金属热处理,1999,12:29～31.
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Laser surface alloying of cast aluminium alloy with Ni and Cr

  • 1. Department of Materials Science & Engineering, HUST, Wuhan 430074, China
  • Received Date: 2003-11-11
  • Available Online: 2004-11-25

Abstract: Ni-Cr powder was mixed into paste with a organic binding agent and then painted onto the surface of cast aluminium alloy ZL108 for laser surface alloying using CO2 laser.With optimum process parameters,the allo yed layer with good metallurgical bonding performance is formed.The microstructu re characteristics of alloyed layer are investigated by using OM,SEM,EDAX and XRD.The results show that the alloyed layer is composed of inter-metallic compo unds of Ni-Al,which is some particles dispersed on the substrate of Al-Si mut ual crystal.The micro-hardness of alloyed layer can reach up to 230HV,which was three times higher than that of the substrate materials.The relative wear resi stance is about two times higher than that of the substrate materials.

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