Abstract
In this study, modern nitrogen steels used for the manufacture of rings for Honda engines (70CC, 90CC, CRF70F, XL70, XR70, C70, CT70, ATC70, CL70) as well as other transport tribotechnical units was investigated. Due to the present ecological situation in the world, new environmentally friendly lubricating fluids for nitrogen steels’ tribotechnical units and surface treatments have been proposed. The results of tribotechnical tests are presented in the form of diagrams, graphs and step polynomials obtained by mathematically describing the changes in wear intensity when the load changes for different lubricating fluids. Friction pairs were compared with ShellHF-E 46 (synthetic lubricating fluid), ShellHF-R (biological origin) and lubricating and cooling liquids with 1%, 3% and 5% vegetable oil concentrations. In tribocoupling it was found that hydrogen diffuses into the metal because the tribodestruction of lubricating coolants plays an active role in the destruction of friction surfaces.
Highlights
The use of lubricating cooling liquids (LCLs) in tribo joints enables a reduction in the intensity of wear
We found that high-nitrogen steels can hold well on their surface layered coatings, of graphite origin, and reduce the intensity of wear [26,27]
Samples of LCL used in industry were selected for investigations: On oil ET-2 TU U 00152365.133-2001 [42,43,44,45,46,47] (LCLn) and new synthesized LCL based on rapeseed (LCLr) oil
Summary
The use of lubricating cooling liquids (LCLs) in tribo joints enables a reduction in the intensity of wear. A separate problem is that most metal structures and equipment items that come into contact with petroleum products (including lubricants) are made from steel and operated at an ambient temperature (from −50 ◦C to +50 ◦C) in different regions of our planet. The top ring is subjected to high nitrogen saturation or use of the HNS, which comes into contact with environmentally friendly tribotechnical compositions. Our own previous studies have shown that lubricating coolants made with the addition of sunflower or rapeseed oils [9] can be successfully used as tribotechnical materials, including in tribo compounds in contact with high-nitrogen steels [10]. At the processing of metals various lubricating and cooling liquids (LCLs) which provide the quality of the made elements of machine-building designs are widely applied. Increased lubricating LCL properties are used in the form of aqueous solutions of low concentration, which is important from an economic point of view
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