Безводневе азотування в тліючому розряді з незалежними параметрами процесу
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Файли
Дата
2019
Автори
Скиба, М.Є.
Стечишин, М.С.
Лукʼянюк, М.В.
Олександренко, В.П.
Skyba, M.Ye.
Stechyshyn, M.S.
Lukianiuk, M.V.
Oleksandrenko, V.P.
Назва журналу
Номер ISSN
Назва тому
Видавець
Хмельницький національний університет
Анотація
Приведено аналіз переваг безводневого азотування в тліючому розряді з незалежними параметрами
процесу, оцінені результати виконаних в цьому напрямку досліджень, намічено перспективи, що відкривають
додаткові можливості в плані оптимізації режимів азотування, для забезпечення результатів модифікації
максимальної відповідності вимогам підвищення працездатності об’єктів обробки в заданих умовах експлуатації.
On the basis of developed energetic theory of hydrogen-free nitriding in glow discharge (HFNGD) with independent modes of satiation of metal surfaces by nitrogen, that was approved by laboratory and industrial tests, the results of metallographic, spectroscopic, Xray structure and frictional analysis research are obtained. The results of made researches shown that autonomous modes of NFNGD provide influence not only of mode parameters (temperature, composition of gas mixture, it’s pressure and time of nitriding), but also energetic parameters of adjustment and control of the process (density of current and voltage in gas-discharge camera). It enables to considerably decrease the energy intensity of the process and to expand the possibilities of NFNGD for the alteration of the physical and chemical properties of the nitrided surfaces. The influence of the mode parameters are analysed in the paper: temperature, composition of gas environment and pressure, on the structure and phase composition of nitrided layers and their properties. The series of research were carried out to study the influence of the current density, voltage and specific power of the electrical discharge in gas-discharge camera on the NFNGD process. It was established that the formation of nitrides occurs at the low levels of energies, and the process of surface dispersion becomes more active at high voltages. For the diffusion of nitrogen to the depth of the metal, sufficiently high levels of current density is necessary. Thus, structure and phase composition of nitrides layers are formed by combination of technological and energetic parameters.
On the basis of developed energetic theory of hydrogen-free nitriding in glow discharge (HFNGD) with independent modes of satiation of metal surfaces by nitrogen, that was approved by laboratory and industrial tests, the results of metallographic, spectroscopic, Xray structure and frictional analysis research are obtained. The results of made researches shown that autonomous modes of NFNGD provide influence not only of mode parameters (temperature, composition of gas mixture, it’s pressure and time of nitriding), but also energetic parameters of adjustment and control of the process (density of current and voltage in gas-discharge camera). It enables to considerably decrease the energy intensity of the process and to expand the possibilities of NFNGD for the alteration of the physical and chemical properties of the nitrided surfaces. The influence of the mode parameters are analysed in the paper: temperature, composition of gas environment and pressure, on the structure and phase composition of nitrided layers and their properties. The series of research were carried out to study the influence of the current density, voltage and specific power of the electrical discharge in gas-discharge camera on the NFNGD process. It was established that the formation of nitrides occurs at the low levels of energies, and the process of surface dispersion becomes more active at high voltages. For the diffusion of nitrogen to the depth of the metal, sufficiently high levels of current density is necessary. Thus, structure and phase composition of nitrides layers are formed by combination of technological and energetic parameters.
Опис
Ключові слова
безводневе азотування в тліючому розряді, нітридна зона, незалежні параметри процесу, густина струму, модифікація, hydrogen-free nitriding in glow discharge, nitride zone, independent process parameters, current density, modification
Бібліографічний опис
Безводневе азотування в тліючому розряді з незалежними параметрами процесу [Текст] / М. Є. Скиба, М. С. Стечишин, М. В. Лук'янюк, В. П. Олександренко // Вісник Хмельницького національного університету. Технічні науки. – 2019. – №2. – С. 11-16.