COMBINED TREATMENT AND WEAR MECHANISM OF NITRIDED COATINGS ON TITANIUM ALLOY VT-6
DOI:
https://doi.org/10.18372/0370-2197.2(103).18694Keywords:
titanium alloy, wear, nitriding, laser treatment, wear intensity, nitrided layerAbstract
The wear process in the tribological system: nitrided titanium alloy - hydraulic fluid - steel is studied. It is shown that the level of wear is determined by tribological structures of the dissipative type, which are self-formed at the evolutionary stage of running-in. Using a linear approximation of the Boltzmann transfer equation, the exponential nature of the running-in stage was established, at which the wear intensity decreases from the initial to the steady-state level and then fluctuates around a constant mean with a constant variance. AMG-10 liquid selectively interacts with the elements. Electronegative elements dissolve in the lubricant, while electropositive elements are transferred to the counterbody, interact with the products of the mechanical destruction of lubricant molecules, and take an active part in the formation of the tribostructure, which reduces the level of direct interaction of the solids in contact. Preliminary laser treatment of titanium alloy activates the process of subsequent nitriding, which makes it possible to reduce the nitriding time while increasing the thickness of the wear-resistant nitrided layer. The use of laser pretreatment on real parts makes it possible to increase the service life of friction units and reduce production costs during their manufacture.
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