Abstract
The current tribological research is intended to achieve maximum wear resistance under the structural adaptability of tribocoupling elements, which requires application of means to reduce the activation of the metal surface layers, decrease in frictional work, regulation of passivation and temperature control. The aim of this study is to identify the patterns that influence the kinetics formation of the boundary layers of lubricating mineral gear oil on activated friction contact surfaces, and the increment of the friction specific work on wear-resistant steel 42Cr4 and 100Cr6 in frequent start and stop operation mode. Due to the activation of surface layers of metal in the non-stationary operating conditions of the contact surfaces, the gradual forming of the boundary lubricant adsorption layers with increased effective viscosity in contact occurs, exhibiting high adaptation ability, and the boundary layer thickness is from 0.2 to 4 microns. This research analyzed the lubricating ability of oil at the starting maximum torque of friction, showing that the thickness of the oil layer formed in contact had a dual nature—boundary and hydrodynamic. The pure rolling conditions promote localization of shear in the lubricating layers, and the high frictional properties of the transmission oil have been identified regardless of the hardness of the investigated surfaces.
Highlights
The variety of physic-chemical processes occurring on the contact surfaces under friction makes it difficult toHow to cite this paper: Al-Quraan, T.M.A., Mikosyanchik, O.O., Mnatsakanov, R.G. and Zаporozhets, O.I. (2016) Structural-Energy Characteristics of Tribotechnical Contact in Unsteady Operational Modes
The normal operation work of tribocoupling elements is characterized by changes of many physical and mechanical parameters of the lubricant and contact surfaces under friction, which are manifested in their structural adaptability [2]
Increment of hydrodynamic component of the lubricating layer thickness under increasing of the total rolling speed up to 1.48 m/s, calculated as the difference between layer thickness measured at a given speed of the contact surfaces and the thickness of the boundary layer measured at the stand makes 1 - 3 mcm, which is under further increase of rolling speed insures the implementation of the hydrodynamic model of the lubricating action (Figure 1)
Summary
The variety of physic-chemical processes occurring on the contact surfaces under friction makes it difficult toHow to cite this paper: Al-Quraan, T.M.A., Mikosyanchik, O.O., Mnatsakanov, R.G. and Zаporozhets, O.I. (2016) Structural-Energy Characteristics of Tribotechnical Contact in Unsteady Operational Modes. The normal operation work of tribocoupling elements is characterized by changes of many physical and mechanical parameters of the lubricant and contact surfaces under friction, which are manifested in their structural adaptability [2]. The main fundamental objectives on increasing durability of tribocoupling are to set up the range of loading-speed and temperature parameters of friction pairs’ operation, the selection of wear-resistant materials and an effective lubricant. To achieve the maximum wear resistance of the structural adaptability of elements of tribocoupling, it is necessary to use means to reduce the activation of the surface layers of the metal, reduce the frictional work and control the passivation and temperature regulation [7]. This research is to develop a method for evaluating the effectiveness of the tribological characteristics of the contact in non-stationery conditions that is a promising direction in determining material performance range of contact surfaces and lubrication during their operation in dynamic loading conditions
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
