Закономерности трения и износа в вакууме детонационных покрытий Cr-Si-B, содержащих дисульфид молибдена

Abstract

Приведены результаты испытаний в условиях вакуума характеристик трения и износа разработанных детонационных покрытий Cr-Si-B, которые дополнительно в качестве антифрикционного компонента содержат добавку твердой смазки в виде диспергированного дисульфида молибдена. Исследуемые детонационные покрытия Cr-Si-B, показали высокие триботехнические характеристики во всем диапазоне испытаний, моделирующих работу узла трения в условиях разреженной атмосферы. При этом, средством регулирования износа и обеспечения высокой антифрикционности покрытий в вакууме является применение в их составе твердосмазочного материала.This article presents the results of tests under vacuum conditions characteristics of friction and wear, elaborated detonation coating Cr-Si-B, as the antifriction additive component contains a solid lubricant in dispersed form of molybdenum disulfide. Results of research and characteristic of a friction and intensity of the wear process of the investigated coatings were compared with the wear resistance of detonation coatings of carbide type VK15 and surface layers obtained from the thermal diffusion alloying with boron, vanadium and chromium. It was noted the high wear resistance of coatings containing molybdenum disulfide. With the help of using modern physical methods of analysis was reviewed qualitative and quantitative composition of the surface layers. The work presents the photomicrographs of the friction surfaces, while studying the surface layer, in which processes of activation are under way, used electron-diffraction analysis. It was stressed that solid lubricating surface film except for antifriction action has anti-wear properties. It had been established that wear-resistant coatings is provided by the creation of the surface of the thin film separating of juvenile object, representing the product anoxic structures based intermetallic phases chemical elements included in the coating composition. Developed for the practices, investigated detonation coating Cr-Si-B, showed high tribological characteristics in the whole range of tests, modeling work of the friction unit in a rarefied atmosphere. In doing so, means to regulate of wear and ensure a high antifriction coatings in vacuum is application in their structure of the solid material, through the structure influences the level of adaptation of the friction due to the modified surface layers that can block the destruction and shielded the unacceptable setting processes.