Search academic texts

Information × Registration Number 0215U006142, 0113U002868 , R & D reports Title Increase of resource and reliability of hinging and posing machines in blocks of steam division of high and low pressure cylinders for steam NPP turbines by synthesis on working surfaces of possing machines elements nanostructure protective coatings, output details with coatings for industrial testing popup.stage_title Head Bilous Vitaliy Arsentievich, Registration Date 23-02-2015 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 For magnification of a resource of friction pairs of the details used in steam distribution blocks of turbine K-325, the complex of experiments on modifying of their effective surfaces by the ionic nitriding of a bottom with the subsequent coating deposition in a common work cycle is executed. For examinations on rise of operational performances the junction consisting of "support" and "pivot" has been used as the base. Preliminary experiments have shown, that technology of atmospheric thermal nitriding traditionally used in industrial conditions does not allow to gain necessary adhesiveness performances for deposited coatings Therefore, the alternative process of the ionic nitriding of a bottom in a nitrogen tenuous atmosphere has been developed. At carrying out of this process the necessary temperature mode of processing of a surface at which, on the one hand, did not exceed temperature of tempering detail was provided, and with another - demanded parameters of hardening (depth and hardness) were reached. Comparative trials of the working performances of the bottoms nitrated in factory and laboratory conditions, have shown, that the ionic nitriding can take the place of the thermal atmospheric process. As protecting coatings on the friction pair surfaces for friction coefficient decrease various nitrides (TiN for " support " and MoN for "pivot") were used. By results of the tentative process of complex ionic-plasma process (nitriding plus protective coating deposition) on full-scale breadboard models of details was approved. Thus depth of hardening in a surface layer has made 100 microns at an average level of microhardness Н = 5 GPa. Sheetings deposited over this bottom to 10 microns in thickness had with it a good adhesion and the high level of a microhardness reaching 27 GPa. Product Description popup.authors Єрмоленко Ірина Геннадіївна Аксьонов Іван Іванович Антоненко Микола Іванович Білоус Віталій Арсентійович Брик Віктор Васильович Жук Григорій Андрійович Задніпровський Юрій Олексійович Залеський Дмитро Юрійович Коваленко Володимир Іванович Комар Анатолій Анатолійович Ломіно Микола Степанович Маринін Володимир Григорович Москалець Олена Леонідівна Павленко Любов Іванівна Решетняк Олена Миколаївна Турчина Олександра Карпівна Устенко Микола Георгійович Худяков Сергій Володимирович Черкасов Володимир Ілліч popup.nrat_date 2020-04-02 Close