Abstract
In order to study the influence of texture on the wear and lubrication performance of the surface of the tools, three kinds of textures with unidirectional convergence morphology were processed on the surface of the samples, and each texture was designed with different area occupancy ratios. Simulation analysis shows that, owing to the reflow and convection effect of liquid in the texture, the lubricating film flowing through the textured surface has a high hydrodynamic pressure value, and the semicircular ring texture is the most prominent. By comparing the friction coefficient, when the area occupancy ratio of texture on the surface is 10%, the surface of the samples with different morphology has the lowest coefficient of friction; the friction coefficient of the semicircular ring textured surface is especially very low. Surface textures reduce the direct contact area between the friction pairs, and generate dynamic pressure lubrication and secondary lubrication, so that the surface friction coefficient of the samples is obviously reduced. The surfaces of the non-textured samples have abrasive wear and contact fatigue wear, and the surfaces of the textured samples have adhesive wear, abrasive wear, and cavitation.
Highlights
It is estimated that about one-third to one-half of the world’s energy consumption is caused by friction and wear
Triangular micro-texture, triangular groove micro-texture, and semicircular triangular micro-texture, triangular groove micro-texture, and ringsemicircular micro-texture with unidirectional convergence wereconvergence designed, and different area occupancy ratios ring micro-texture with unidirectional were designed, and different were designed for each texture morphology, whichtexture were 7%, 10%, and 13%, The and effects area occupancy ratios were designed for each morphology, whichrespectively
The effects of texture morphology, area occupancy ratio, working load, and rotational speed on the tribological properties of the specimens were investigated by Fluent fluid simulation, friction and wear tests, and surface topography observations
Summary
It is estimated that about one-third to one-half of the world’s energy consumption is caused by friction and wear. Shot peening, and surface coating methods, surface texturing and patterning methods have been widely studied recently, which has obvious effects on improving the surface friction performance of tools [4]. Studies have shown that, when the surface of tools has a certain texture, its wear resistance will be improved, and a certain non-smooth surface will improve the friction and lubrication properties of the lubricating fluid [5,6]. The predecessors mainly proved the friction and lubrication effects of the surface texture by experiments, but simulation analyses were very limited In this experiment, simulation analysis was combined with the specific experimental methods, the simulation results were supplemented by experiments, and the effects of morphology and area occupancy ratio on the lubrication and friction characteristics of the textures were investigated
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