Improved tribology performances of copper graphite (Cu/C) using a phosphorized oxidization surface obtained with tricresyl phosphate (TCP)

Lu, Hailin; Hu, Feng; Liu, Qi; Li, Yihong

doi:10.1108/ilt-05-2021-0181

Cited by 2 publications

(1 citation statement)

References 37 publications

(36 reference statements)

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“…Phosphating with a manganese composite solution provided the best corrosion resistance and wear resistance for gears. Lu et al (2021) found that bearing steel coated with an oxidized tricresyl phosphating (OTCP) film demonstrated improved tribological performance (lower COF and wear rate) when paired with Cu/C, outperforming both oxidized and untreated bearing steel. Additional chemical reactions occurred when the oxide disk was immersed in tricresyl phosphate, resulting in the formation of a FePO 4 film after heating.…”

Section: Introductionmentioning

confidence: 99%

Effect of composite solid lubricant coatings on the tribological performance of thrust cylindrical roller bearings

Xu,

Zhang

2023

ILT

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Purpose This study aims to form composite solid lubricant coatings on the surface of bearing steel, which can significantly improve the tribological properties of thrust cylindrical roller bearings (TCRBs). Phosphating films possess microscopic porosity that typically needs to be sealed with oil, grease or wax. Due to its unique crystal structure, the phosphating film itself also exhibits a certain degree of lubricity. In this study, solid lubricants are used to fill the pores of the phosphating film. By combining the phosphating film with solid lubricants, lubrication and wear reduction can be achieved. Design/methodology/approach In this study, the surfaces of the shaft washer (WS) and seat washer (GS) were treated with zinc-phosphating. Subsequently, a solid lubricant solution (polytetrafluoroethylene [PTFE], MoS2 and graphite) was sprayed onto the phosphated samples at concentrations of 1 , 2 and 3 g/L. The porous and adsorptive nature of the phosphating film was used to embed the solid lubricant particles into the film, thus forming a composite lubrication layer containing solid lubricants on the surface of the bearing steel. Findings The addition of solid lubricant materials has shown significant potential in reducing wear losses compared with phosphated samples without such additives. Increasing the amount of solid lubricant added can facilitate the formation of a transfer film, which further enhances the protective properties. However, it is important to note that excessive amounts of solid lubricant material can contribute to seizure, leading to increased wear losses of the cage and a higher average coefficient of friction (ACOF).By spraying a PTFE solution with a concentration of 2 g/L, the lowest ACOF and cage wear loss were achieved, resulting in reductions of 60.5% for the ACOF and 89.4% for the cage wear loss. Similarly, when spraying a graphite solution with a concentration of 3 g/L, the lowest wear losses for GS and WS were observed, with reductions of 51.7% for GS wear loss and 38.9% for WS wear loss. Originality/value The combination of the phosphating film and solid lubricants aims to achieve lubrication and wear reduction, providing a new approach to wear-resistant technology for TCRBs. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2023-0231/

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Section: Introductionmentioning

confidence: 99%

Effect of composite solid lubricant coatings on the tribological performance of thrust cylindrical roller bearings

Xu,

Zhang

2023

ILT

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Numerical analysis and formula correction of mechanical seal ring wear of slurry pump based on thermal deformation

Wei

Ahmat

Runsheng

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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In view of the excessive wear of the mechanical seal of the slurry pump in the project and the inconsistency between the theoretical wear and the actual wear, this article studies the wear of the mechanical seal of the slurry pump. In this article, a numerical model of mechanical seal wear based on thermal deformation is established. The hardness, wear coefficient and dry friction coefficient of the sealing ring were obtained through experiments, and the wear morphology was collected by the ultra-depth microscope. In this article, the precise calculation of mechanical seal wear is realized, and the seal ring wear depth under single and multiple field conditions is obtained. The wear formula of the mechanical seal is optimized by adding a correction index, and the end face structure of the mechanical seal is improved. The results show that: the seal ring forms a converging surface due to thermal deformation resulting in more severe wear of the inner diameter relative to the outer diameter; the revised wear equation can more accurately predict the life of the nickel-based tungsten carbide alloy mechanical seal, with a 3.2 times increase in expected life after comprehensive end face improvement.

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Improved tribology performances of copper graphite (Cu/C) using a phosphorized oxidization surface obtained with tricresyl phosphate (TCP)

Cited by 2 publications

References 37 publications

Effect of composite solid lubricant coatings on the tribological performance of thrust cylindrical roller bearings

Effect of composite solid lubricant coatings on the tribological performance of thrust cylindrical roller bearings

Numerical analysis and formula correction of mechanical seal ring wear of slurry pump based on thermal deformation

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