Effect of nano-CeO2 on the microstructure and properties of laser clad nickel-based alloy coating
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Department of Mechanical Engineering, South China University of Technology, Guangzhou 510640, China;
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Research Center for Laser Processing, Anhui University of Technology, Maanshan 243002, China
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Corresponding author:
SONG Chuan-wang, chwsong@126.com
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Received Date:
2005-07-08
Accepted Date:
2005-08-16
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Abstract
The microstructure and properties of laser clad coating are introduced after adding nano particles.Nickel-based alloy powder with different addition of nano-CeO2 is laser cladded onto Q235 steel substrate.The coating is examined to reveal the microstructure,phase composition,microhardness and wear resistance using optical microscope(OP),X-ray diffractometer(XRD),microhardness tester,block-on-ring wear tester and scanning electron microscope(SEM) respectively.The results show that fine dendrite and equiaxed dendrite are observed by adding nano-CeO2.Equiaxed dendrite across the section is obtained when the additive reaches to 1.5%(mass fraction).A new phase(Ce2Ni21B6) is found.The microhardness and wear resistance of the coating are much higher than those of the substrate,and further improved by adding nano-CeO2.But the hardness decreased when the additive amount is much high.The mechanism of these effects is also discussed.
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References
|
[1]
|
GLEITER H.Nanostructured materials:basic concepts and microstructure[J].Acta Materialia,2002,48(1):1～29. |
|
[2]
|
CHEN H,PAN Ch X,PAN L et al.Development of wear-resistant laser cladding[J].Heat Treatment of Metals,2002,27(9):5～10(in Chinese). |
|
[3]
|
HE Y,HUANG Z,QI H et al.Oxidation behavior of microcrystalline Ni-20Cr-Y2O3 ODS alloy coatings[J].Materials Letters,2000,45(2):79～85. |
|
[4]
|
SURYANARAYANA C.Mechanical alloying and milling[J].Progress in Materials Science,2001(46):1～184. |
|
[5]
|
HU M L,XIE Ch Sh,ZHU B L et al.Fractogragy study on cracking behavior of laser-clad multitrack coatings[J].Transactions of Materials and Heat Treatment,2001,22(2):23～26(in Chinese). |
|
[6]
|
SHEN Y F,CHEN J Zh,FENG Zh Ch et al.Distribution and behavior of rear earth in laser coating[J].Journal of the Rear Earth Society,1997,15(4):344～349(in Chinese). |
|
[7]
|
XU Y,JI H,CHEN X et al.Effect of laser surface melting treatment on the structure and corrosion resistance of rare earth permeating layer of pure iron[J].Journal of the Rear Earth Society,2001,19(4):346～349(in Chinese). |
|
[8]
|
LI M X,HE Y Zh,SUN G X.Al2O3 nanocrystalline/Ni based alloy composite coatings produced by laser cladding[J].Chinese Journal of Lasers,2004,31(9):1149～1152(in Chinese). |
|
[9]
|
YU Z S,ZHU Y Y.The rare earth in iron[M].Beijing:Metallurgical Industry Press,1982.38～297(in Chinese). |
|
[10]
|
LI A M,XU B F,PAN Y J.Effect of La2O3 microstructure and property of TiC/Ni-based composite coating[J].Journal of Iron and Steel Reseach,2003,15(1):57～61(in Chinese). |
|
[11]
|
LI H D,XIAO J M.Material surface and interface[M].Beijing:Tsinghua University Press,1990.1～198(in Chinese). |
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