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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
ХЛЄВНА, Ю. Л.; Національний авіаційний університет (2015)
Publisher: Національний Авиаційний Університет
Languages: Ukrainian
Types: Unknown
Subjects: припрацювання; трибологічні структури; трибологічна сис тема; сервовитна плівка; пари тертя, УДК 621.891, приработки; трибологических структуры; трибологические система; сервовидная пленка; пары трения, running-in; tribological structures; tribological system; servovite film; friction pair
Встановлено закономірності зміни характеристик процесу припрацювання відрівня зовнішніх факторів трибологічної системи «бронза – АМГ-10 – сталь». При досліджені поверхонь тертя отримано дані щодо механізму утвореннята властивостей трибологічних структур на етапі припрацювання Установлены закономерности изменения характеристик процесса приработки от уровня внешних факторов трибологической системы «бронза - АМГ-10 - сталь». При исследовании поверхностей трения получены данные о механизме образования и свойств трибологических структур на этапе приработки It is shown that a step load increment, regulation of frictional heat generation and constant slidingvelocity activate the process of running-in, broaden the range of maximum permissibleloads, reducing the time and wear-and-tear, as well as the probability of jamming, seizure andfailure of running-in. Study of the friction surface Бр.АжМц10-3-1,5–АМГ–10–ШХ15 bymethods of optical, scanning electron microscopy and energy dispersive X-ray microanalysis,Auger electron spectroscopy showed fundamentally different properties than it had been providedby the theory of "selective transfer" inherent to the present tribological system. We haveestablished significantly different pattern of changes in the chemical composition of the surfacelayers of bronze and steel: preferential carbonization in significant concentrations of bronze,simultaneous preferential steel oxidation, which is a new aspect of the formation mechanismand properties of the surface "servovite film" on the bronze. "Copper" tone on the friction surfaceof steel is not due to "rubbed" surface film of copper but due to color of submicron surfacefilms of iron oxides
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