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Preparation of tungsten disulfide motor oil and its tribological characteristics

  • Shi Chen  (石琛)Email author
  • Mao Da-heng  (毛大恒)
  • Feng Hao  (俸颢)
Article

Abstract

Through using mineral oil and synthetic oil to deploy the semisynthesis base oil, modifying the surfaces of ultrafine tungsten disulfide grains by surface chemical embellishment and adsorption embellishment to make them suspended steadily in the base oil as solid lubricating additive, and adding some function additives, the tungsten disulfide motor oil was prepared. The tribological characteristics of this kind motor oil and the well-known motor oils in our country and overseas were studied. The results show that the oil film strength of this kind of motor oil is respectively 1.06 and 1.38 times of that of shell helix ultra motor oil and great wall motor oil, and its sintering load is 1.75 and 2.33 times of that of them, and when tested under 392 N, 1 450 r/min and 30 min, the friction coefficients of friction pairs lubricated by the tungsten disulfide motor oil decrease with the increase of time, meanwhile, the diameter of worn spot is small, and the surface of worn spot is smooth, and no obvious furrows appear. The experiments indicate that the tungsten disulfide motor oil has the better antiwear, antifriction and extreme pressure properties than the well-known motor oils.

Key words

tribology motor oil tungsten disulfide lubricating property 

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Copyright information

© Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Shi Chen  (石琛)
    • 1
    Email author
  • Mao Da-heng  (毛大恒)
    • 1
  • Feng Hao  (俸颢)
    • 1
  1. 1.School of Mechanical and Electrical EngineeringCentral South UniversityChangshaChina

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