Abstract
As an excellent light metal material, titanium alloy has an important application in high technology equipment. In this study, the composite lubrication structure was prepared on the titanium alloy surface by combining the surface texture, thermal oxidation layer, and polytetrafluoroethylene (PTFE)-based lubricating coating. The effect of texture parameters and thermal oxidation layer on the fretting wear behavior of the composite lubrication structure was evaluated under a load of 50 N. The results showed that the PTFE-based lubricating coating on the textured surface showed excellent friction-reduction and anti-wear effect compared with the coating on the single smooth surface and thermal oxidation surface. The introduction of a thermal oxidation layer on the textured surface further improved the fretting wear life of lubrication coating. The friction coefficient and wear rate can be as low as 0.242 and 2.3 × 10−5 mm3·N−1m−1, respectively, under dry fretting contact conditions. Compared with the untextured surface, the longevity of the composite lubrication structure is extended by more than 90%.
Highlights
Academic Editors: DamianThe vast development of light metal materials has been gradually applied to various fields
Based on the above background, this study attempts to prepare the composite lubrication structure on the surface of titanium alloy by combining the laser surface texture, thermal oxidation layer and bonded PTFE-based lubricating coating
The roughness of the surface between the grooves was measured to be consistent with the untextured surface, and the effect of Laser surface texture (LST) on the TC4 alloy surface was gauged by Vickers hardness tester
Summary
The vast development of light metal materials has been gradually applied to various fields. If the PTFE solid lubricant is introduced into the patterned structure of the thermal oxidation textured surface of titanium alloy, it is expected to form a self-lubricating composite wear resistant structure, to further enhance the anti-friction and wear resistant effect and effectively prolong the wear life of titanium alloy. Based on the above background, this study attempts to prepare the composite lubrication structure on the surface of titanium alloy by combining the laser surface texture, thermal oxidation layer and bonded PTFE-based lubricating coating. The effects of the texture parameters, thermal oxidation layer, and PTFE coating on the tribological properties of titanium alloy surface are analyzed, and the friction and wear mechanisms under fretting conditions are explored
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