Cooperative effect of surface alloying and laser texturing on tribological performance of lubricated surfaces

Abstract

The cooperative effect of laser surface texturing (LST) and double glow plasma surface alloying on tribological performance of lubricated sliding contacts was investigated. A Nd:YAG laser was used to generate microdimples on steel surfaces. Dimples with the diameter of 150 μm and the depth of 30–35 μm distributed circumferentially on the disc surface. The alloying element Cr was sputtered to the laser texturing steel surface by double glow plasma technique. A deep diffusion layer with a thickness of 30 μm and a high hardness of HV900 was formed in this alloy. Tribological experiments of three types of samples (smooth, texturing and texturing + alloying) were conducted with a ring-on-disc tribometer to simulate the face seal. It is found that, in comparison with smooth steel surfaces, the laser texturing samples significantly reduce the friction coefficient. Moreover, the lower wear rate of the sample treated with the two surface techniques is observed.

Keywords

laser surface texturing / double glow plasma surface alloying technology / carbon steel / tribological performance / lubricated surface

References

[1] VoevodinA. A., ZabinskiJ. S.. Laser surface texturing for adaptive solid lubrication [J]. Wear, 2006, 261: 1285-1292

[2] WanY., XiongD.-sheng.. Study of laser surface texturing for improving tribological properties [J]. Tribology, 2006, 26(6): 603-607

[3] ErdemirA.. Review of engineered tribological interfaces for improved boundary lubrication [J]. Tribology International, 2005, 38: 249-256

[4] KawasegiN., SugimoriH., MorimotoH., MoritaN., HoriI.. Development of cutting tools with microscale and nanoscale textures to improve frictional behavior [J]. Precision Engineering, 2009, 33: 248-254

[5] Zum GahrK. H., WahlR., WauthierK.. Experimental study of the effect of microtexturing on oil lubricated ceramic/steel friction pairs [J]. Wear, 2009, 267: 1241-1251

[6] AnderssonP., KoskinenJ., VarjusS., GerbigY., HaefkeH., GeorgiouS., ZhmudB., BussW.. Microlubrication effect by laser-textured steel surfaces [J]. Wear, 2007, 262: 369-379

[7] LiuY.-y., XiaC.-q., PengX.-min.. Effect of heat treatment on microstructures and mechanical properties of Al-6Zn-2Mg-1.5Cu-0.4Er alloy [J]. Journal of Central South University of Technology, 2010, 17(1): 24-27

[8] EtsionI., SherE.. Improving fuel efficiency with laser surface textured piston rings [J]. Tribology International, 2009, 42: 542-547

[9] WanY., XiongD.-sheng.. The effect of laser surface texturing on frictional performance of face seal [J]. Journal of Materials Processing Technology, 2008, 197: 96-100

[10] KovalchenkoA., AjayiO., ErdemiraA., FenskeG., EtsionI.. The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact [J]. Tribology International, 2005, 38: 219-225

[11] WangX.-l., LiuW., ZhouF., ZhuDi.. Preliminary investigation of the effect of dimple size on friction in line contacts [J]. Tribology International, 2009, 42: 1118-1123

[12] NakataK., YamauchiW., AkamatsuK., UshioM.. Plasma nitriding behavior of low carbon binary alloy steels [J]. Surface and Coatings Technology, 2003, 174/175: 1206-1210

[13] RapoportL., MoshkovichA., PerfilyevV., GedankenA., KoltypinY., SominskiE., HalperinG., EtsionI.. Wear life and adhesion of solid lubricant films on laser-textured steel surfaces [J]. Wear, 2009, 267: 1203-1207

[14] RykG., KligermanY., EtsionI.. Experimental investigation of partial laser surface texturing for piston rings friction reduction [J]. Tribology Transaction, 2005, 48: 583-588

[15] PodgornikB., JacobsonS., HogmarkS.. Influence of EP and AW additives on the tribological behaviour of hard low friction coatings [J]. Surface and Coatings Technology, 2003, 165: 168-175

[16] LiZ.-h., LiuS.-s., ChenZ.-yong.. Study on plasma discharge parameters in double-glow plasma surface alloying furnace [J]. Vacuum, 2009, 83: 801-804

[17] ZhuX.-l., YaoZ.-j., GuX.-d., CongW., ZhangP.-ze.. Microstructure and corrosion resistance of Fe-Al intermetallic coating on 45 steel synthesized by double glow plasma surface alloying technology [J]. Transactions of Nonferrous Metals Society of China, 2009, 19(2): 143-148

[18] WanY., XiongD.-s., WangJun.. Tribological properties of dimpled surface alloying layer on carbon steel [J]. Journal of Wuhan University of Technology: Materials Science, 2009, 24(2): 218-222

[19] XuJ.-y., LiuY.-p., WangJ.-z., LiuX.-y., GaoY., XuZhong.. A study on double glow plasma surface metallurgy Mo-Cr high speed steel of carbon steel [J]. Surface and Coatings Technology, 2007, 201: 5093-5096

[20] GaoY., GaoQ., XuJ.-y., LiaoH.-y., XuZhong.. Morphology and composition of plasma alloying of Cr-Mo layer [J]. Surface and Coatings Technology, 2007, 201: 5526-5528