Effects of graphite content on the microstructure and wear properties of an AISI 8620 steel surface modified by tungsten inert gas (TIG)

Surface texturing is one of modern technologies using for improvement friction and wear properties of rubbed surfaces. The simple and effective methods of surface texturing are mechanical or chemical treatments of friction surfaces. In this work we deal with chemical treatment of steel surfaces with following filling the profile by solid lubricant particles as MoS2. The steel surfaces were etched with phosphoric acid. The effect of time and temperature of etching on the surface roughness parameters was studied. Some standard roughness parameters of etched surface were measured. It was found that the parameters of roughness as Rz and Sm characterizing the depth of valleys and their size can be used for description of etched surfaces. Optimal parameters, Rz and Sm, providing the best tribological properties were determined: Rz = 5 ∼ 7 m and Sm = 50–70 m. The thickness of solid lubricant film was about 1 m. Finally, the tribological properties of MoS2 films on the steel surfaces textured by chemical treatment were performed. The friction coefficient and wear life of solid lubricant films was assessed. Friction and wear properties of MoS2 films on etched surfaces were compared with similar films on virgin steel surface. The wear life of MoS2 films on etched surfaces was 5–7 times larger than for solid lubricant film on mechanically treated steel surface.

Download Full-text

Friction and wear properties of a surface-modified TiO2 nanoparticle as an additive in liquid paraffin

Wear ◽

10.1016/s0043-1648(97)00200-7 ◽

1997 ◽

Vol 213 (1-2) ◽

pp. 29-32 ◽

Cited By ~ 189

Author(s):

Qunji Xue ◽

Weimin Liu ◽

Zhijun Zhang

Keyword(s):

Friction And Wear ◽

Liquid Paraffin ◽

Tio2 Nanoparticle ◽

Wear Properties ◽

Friction And Wear Properties ◽

Surface Modified

Download Full-text

Wear Properties of Surface Modified Hard Layers Using Electrical Discharge Machine

Journal of Advanced Mechanical Design Systems and Manufacturing ◽

10.1299/jamdsm.2.629 ◽

2008 ◽

Vol 2 (4) ◽

pp. 629-639 ◽

Cited By ~ 4

Author(s):

Koei MATSUKAWA ◽

Katsunori SATOH ◽

Akihiro GOTO ◽

Nagao SAITO ◽

Naotake MOHRI

Keyword(s):

Electrical Discharge ◽

Electrical Discharge Machine ◽

Wear Properties ◽

Discharge Machine ◽

Surface Modified

Download Full-text

Surface Modification of High-Speed Steel by Plasma Nitriding

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.709.403 ◽

2014 ◽

Vol 709 ◽

pp. 403-409 ◽

Cited By ~ 1

Author(s):

Bauyrzhan K. Rakhadilov ◽

Mazhyn Skakov ◽

Erlan Batyrbekov ◽

Michael Scheffler

Keyword(s):

Surface Layer ◽

Phase Composition ◽

Diffusion Layer ◽

High Speed ◽

Steel Surface ◽

Plasma Nitriding ◽

High Speed Steel ◽

R6m5 Steel ◽

Modified Layer ◽

Surface Modified

The article investigates the changing in the structure and phase composition of the R6M5 high-speed steel surface layer after electrolytic-plasma nitriding. It is found that after electrolytic-plasma nitriding on the R6M5 steel surface, modified layer is formed, which consist from a diffusion layer. It was showed phase composition of difysion layer is changing depending on the nitriding. It is found that electrolytic-plasma nitriding lead to accelerated formation of the modified layer. It is determined that after electrolytic-plasma nitriding on the high-speed steel surface, modified layer is formed, consisting only of the diffusion layer.

Download Full-text

Surface Modification of CuS Nanoparticles and their Effect on the Tribological Properties of Hybrid PTFE/Kevlar Fabric/Phenolic Composite

Journal of Composite Materials ◽

10.1177/0021998310369588 ◽

2010 ◽

Vol 44 (21) ◽

pp. 2461-2472 ◽

Cited By ~ 11

Author(s):

Hui-Juan Zhang ◽

Zhao-Zhu Zhang ◽

Fang Guo ◽

Wei Jiang ◽

Kun Wang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Fourier Transform ◽

Tribological Properties ◽

Wear Properties ◽

Surface Modified ◽

Environmental Temperatures ◽

Scanning Electron ◽

Phenolic Composite ◽

Antiwear Ability

Oleic acid-modified CuS nanoparticles were chemically synthesized. The tribological properties of surface modified and unmodified CuS nanoparticles as additives in the hybrid polytetrafluoroethylene (PTFE)/Kevlar fabric/phenolic composite were investigated in detail. The experimental results indicated that the incorporation of modified CuS nanoparticles improved the antiwear ability of the fabric/phenolic composite at varied loads and environmental temperatures. The reasons for the enhanced wear properties of the fabric/phenolic composite filled with surface-modified CuS nanoparticles were discussed based on the results of scanning electron microscopy and Fourier transform infrared spectroscopy.

Download Full-text