Investigation on tribological behaviors of surface micro-forming 20CrNiMo steel under laser shock processing
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1.
Department of Electromechanical Engineering, Jiangsu Vocational and Technical College of Finance & Economics, Huaian 223003, China;
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2.
Jiangsu Province Key Laboratory of Digital Manufacture Technology, Huaiyin Institute of Technology, Huaian 223003, China
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Received Date:
2012-03-19
Accepted Date:
2012-03-26
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Abstract
In order to study tribological behaviors of surface micro-forming 20CrNiMo steel under laser shock processing(LSP),the effects of LSP on the friction and wear behaviors of 20CrNiMo steel were investigated through observing micro-structure and measuring the macro-surface profile.Firstly,20CrNiMo was impacted by overlapping LSP in different overlap ratio,and then micro-structure of surface layer was observed through transmission electron microscope,finally,the pictures for surface layer grain state were obtained.Friction and wear test was conducted by CETR UMT Tribometer,surface friction coefficient and wear volume was obtained.The results indicate that grain refinement happens in the surface layer due to LSP impacting 20CrNiMo.Friction and wear behaviors can be improved obviously because fine grain in the grain refinement layer can restrain fatigue wear on lubricated sliding wear process effectively.
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References
|
[1]
|
KATO K.Wear in relation to friction——a review[J].Wear,2000,241(2):151-157. |
|
[2]
|
XIA Z B.Experiment on heat treatment process of 20CrNiMo steel shifting fork[J].Heat Treatment of Metals,2011,36(10):65-67(in Chinese). |
|
[3]
|
DING Y H,HUANG H Y.Effect of forging defect of 20CrNiMo cone and jaw to mechanical properties[J].Forging&Stamping Technology,2006,31(3):13-15(in Chinese). |
|
[4]
|
FLANNERY M,JONES E,BIRKINSHAW C.Analysis of wear and friction of total knee replacements(partⅡ):friction and lubrication as a function of wear[J].Wear,2008,265(7/8):1009-1016. |
|
[5]
|
HORNG J H.Studies of tribological behavior and separation between surfaces at initial boundary lubrication[J].Wear,1998,216(1):8-14. |
|
[6]
|
WEN S Z.Existing state and development of tribology research in China[J].Chinese Journal of Mechanical Engineering,2004,40 (11):1-6(in Chinese). |
|
[7]
|
LU J Z,LUO K Y,DAI F Z,et al.Effects of multiple laser shock processing(LSP)impacts on mechanical properties and wear behaviors of AISI 8620 steel[J].Materials Science and Engineering,2012, A536:57-63. |
|
[8]
|
ETSION I.State of the art in laser surface texturing[J].Journal of Tribology,2005,127(1):248-253. |
|
[9]
|
FU Y H,YE X,ZHANG Y K,et al.Study on the technology of laser honing applied in machining the cylinder bore of engine[J].Laser Technology,2002,26(5):379-381(in Chinese). |
|
[10]
|
WANG X,CHEN Y X,LIU H X,et al.Numerical simulation of the ablation thermal field and crater in the laserm icro-texture sculpt[J].Laser Technology,2007,31(6):565-580(in Chinese). |
|
[11]
|
FAN Y,WANG S B,WU H X,et al.Experimental research of laser shock processing on aerial aluminum alloy[J].Laser Technology,2003,27(4):273-275(in Chinese). |
|
[12]
|
LU J Z,LUO K Y,FENG A X,et al.Micro-structural enhancement mechanism of LY2 aluminum alloy by means of a single laser shock processing[J].Chinese Journal of Lasers,2010,37(10):2662-2666(in Chinese). |
|
[13]
|
ZHONG J W,LU J Z,LUO K Y,et al.Investigation on tribological behaviors of laser shock processing AISI 8620[J].Chinese Journal of Lasers,2012,39(1):103001(in Chinese). |
|
[14]
|
ZHANG Y K,LU J Z,REN X D,et al.Effect of laser shock processing on the mechanical properties and fatigue lives of the turbojet engine blades manufactured by LY2 aluminum alloy[J].Materials and Design,2009,30(5):1697-1703. |
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