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The activities of the Polish Metrological Union are financed using the funds of the Ministry of Education and Science as part of a targeted subsidy for the implementation of the task titled “Establishment and Coordination of the activities of the Polish Metrological Union (PMU)” under contract No. MEiN/2021/DPI/179. This research was partially supported by the Mechanical Engineering Discipline Fund of Lublin University of Technology (Grant No. FD-20/IM-5/016).
This paper presents the experimental results of a study investigating the impact of the
machining fluid type, the variable factor, used in slide burnishing on 2D and 3D surface roughness;
surface topography; Abbott–Firestone curve shape; microhardness; and SFE (surface free energy).
In the experiment, pre-ground, ringed samples of C45 steel were used. The results showed an
over eight-fold decrease in the value of the Ra (arithmetical mean deviation) parameter and over a
five-fold decrease in the Rt (total height of profile) parameter in relation to their values after grinding.
The parameters Rpk (reduced peak height), Rk (core roughness depth), and Rvk (reduced valley
depth) were also reduced. The Abbott–Firestone curve after slide burnishing changed its angle
of inclination (it was more flattened), and the material ratio Smr increased. The reduction in the
Rpk and Rk parameters and increased material ratio will most likely contribute to restoring the
functionality of these surfaces (increased resistance to abrasive wear). After slide burnishing, the
maximum 25% increase in microhardness was obtained compared to the value after grinding, while
the layer thickness was 20 μm. The surface energy of elements subjected to slide burnishing using
various machining fluids slightly increased, or its value was close to that of the ground surface.
The most favourable properties of the surface layer in terms of mating between two elements were
obtained for a part that was slide-burnished with a mixture of oil + polymethyl methacrylate (PMM)
+ molybdenum disulphide (MoS2).
