Search academic texts

Information × Registration Number 0221U100288, 0120U100143 , R & D reports Title Development of an innovative method of the surface vacuum treatment of steam turbines parts from steels 15Х12ВНМФ and 20Х1М1Ф1ТР with the purpose of guaranteed maintenance of operating temperatures up to 650 °С popup.stage_title Head Rudenkiy Sergiy G., Доктор технічних наук Registration Date 04-01-2021 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 Scientific report: 58 p., 18 tab., 13 fig., 18 sources. VACUUM ACTIVATED DIFFUSION CHROME CHEMISTRY, STEEL 15Х12ВНМФ, STEEL 20Х1М1Ф1ТР, HEAT RESISTANCE, CAVITATION, WEAR. The object of research - samples of steels 15Х12ВНМФ and 20Х1М1Ф1ТР after vacuum activated chromium plating at temperatures of 1070 and 1100 0С and annealing duration of 4 and 10 hours. The purpose of research is to develop protective coatings on parts of steam turbines, which provide high physical and chemical properties of product surfaces. The method of vacuum activated diffusion chromium plating will create protective layers on the surface of samples of steels 15Х12ВНМФ and 20Х1М1Ф1ТР at different process parameters. When the surface of the parts is saturated with chromium, a diffuse layer is formed, which should provide protection of the surface from the effects of steam-gas mixture at a temperature of 650 ° C. Research methods - such methods as X-ray diffraction analysis, X-ray fluorescence analysis (X-ray diffraction analysis), metallographic analysis methods, tests for heat resistance, tests of samples for cavitation and wear were used. Protective coatings - diffusion layers on samples of steels 15Х12ВНМФ and 20Х1М1Ф1ТР under different conditions of chromium plating are obtained. It was found that increasing the process temperature and its duration leads to an increase in the chromium content on the surface of the samples. Tests in the case of cavitation-erosion and abrasive wear on the surface of chrome-plated steel samples showed that chrome-plated samples are inferior in stability to the original samples. According to the results of comparative tests of samples for heat resistance, cavitation, wear and metallographic method of analysis, it was concluded that the use of this type of coating to protect parts of steam turbines from exposure to steam-gas mixture at elevated temperatures. Product Description popup.authors Bilous Vitaliy A Barankov Mykhailo I Bortnitska Margarita O Voyevodin Viktor M Volobuiev Oleksandr І. Vorobiov Anatolii Р. Hetman Valentyna F. Hozhenko Sergiy V. Holovko Mykola G. Domnych Viacheslav М. Zirka Mykola F. Zmij Viktor I Kartsev Mykola F. Kovalenko Volodymyr I Komar Anatoliy A Korneev Oleksandr O Krainiuk Yevhen О. Kunchenko Viktor V Kunchenko Olexiy V Kunchenko Yurii V Liashenko Ihor А. Мarinin Volodymyr H Martynenko Liudmyla І. Ryzhova Tetiana P. Rudenkiy Sergiy G. Serdiuk Iryna V Serchenko Maryna Р. Yaies Nataliia А. popup.nrat_date 2021-01-04 Close