Voronezh, Voronezh, Russian Federation
UDK 62 Инженерное дело. Техника в целом. Транспорт
The effect of the sandblasting pressure and the volume of alumina on the roughness of the substrate made of the AK12MMgN alloy, on the roughness of the deposited galvanic-plasma modification (GPM) coatings after blast cleaning, and on the adhesion strength of these coatings is investigate. It has been established that the proposed technology of surface treatment of cylinder-piston group (CPG) parts made of AK12MMgN alloy both before the application of GMG coatings and after their application to the above alloy makes it possible to obtain a heat-shielding layer, leading to significant fuel savings in diesel internal combustion engines. This method of treating the surfaces of the parts of a diesel engine CPG before and after applying heat-protective and wear-resistant coatings, confirmed by full-scale and bench tests, seems to be effective.
CYLINDER-PISTON GROUP, GALVANIC-PLASMA MODIFICATION, HEAT-PROTECTIVE COATING, JET-ABRASIVE TREATMENT, AVERAGE ROUGHNESS, COEFFICIENT OF FRICTION.
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DOI:
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УДК 62.843.6
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05.02.07 – Технология и оборудования механической и физико-технической обработки
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ПОВЕРХНОСТЕЙ ДЕТАЛЕЙ ЦПГ
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TO THE QUESTION OF SURFACE TREATMENT OF CPG PARTS IN THE PROCESS OF APPLYING COATINGS ON THEM
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Аль-Бдейри Махмуд Шакир Хассан аспирант кафедры материаловедения и нанотехнологий НИУ «БелГУ», г. Белгород, РФ
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Al'-Bdeyri Makhmud Shakir Khassan graduate student of the department of materials science and nanotechnology of University of Scientific Research "Belgorod State University", Belgorod, RF
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Красильников Владимир Владимирович доктор технических наук, профессор кафедры материаловедения и нанотехнологий НИУ «БелГУ», г. Белгород, РФ
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Krasilnikov Vladimir Vladimirovich doctor of technical sciences, professor of the department of materials science and nanotechnology of University of Scientific Research "Belgorod State University", Belgorod, RF
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доктор технических наук, доцент, заведующий кафедрой машиностроительных технологий ФГБОУ ВО «Воронежский государственный лесотехнический университет имени Г.Ф. Морозова», г. Воронеж, РФ e-mail: kadyrmetov.a@mail.ru
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doctor of technical sciences, associate professor, head of machine-building technology department of Federal State Budget Educational Institution of Higher Education “Voronezh State University of Forestry and Technologies named after G.F. Morozov”, Voronezh, RF e-mail: kadyrmetov.a@mail.ru
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Сергеев Сергей Валерьевич кандидат технических наук, доцент, начальник НИЛ технологических систем НИУ «БелГУ», г. Белгород, РФ
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Sergeyev Sergey Valerevich candidate of technical sciences, associate professor, head of the scientific research laboratory of technological systems of Research University "Belgorod State University", Belgorod, RF
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Аннотация.
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Annotation. The effect of the sandblasting pressure and the volume of alumina on the roughness of the substrate made of the AK12MMgN alloy, on the roughness of the deposited galvanic-plasma modification (GPM) coatings after blast cleaning, and on the adhesion strength of these coatings is investigate. It has been established that the proposed technology of surface treatment of cylinder-piston group (CPG) parts made of AK12MMgN alloy both before the application of GMG coatings and after their application to the above alloy makes it possible to obtain a heat-shielding layer, leading to significant fuel savings in diesel internal combustion engines. This method of treating the surfaces of the parts of a diesel engine CPG before and after applying heat-protective and wear-resistant coatings, confirmed by full-scale and bench tests, seems to be effective.
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Ключевые слова: ЦИЛИНДРОПОРШНЕВАЯ ГРУППА, ГАЛЬВАНО-ПЛАЗМЕННАЯ МОДИФИКАЦИЯ, ТЕПЛОЗАЩИТНОЕ ПОКРЫТИЕ, СТРУЙНО-АБРАЗИВНАЯ ОБРАБОТКА, СРЕДНЯЯ ШЕРОХОВАТОСТЬ, КОЭФФИЦИЕНТ ТРЕНИЯ.
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Keywords: CYLINDER-PISTON GROUP, GALVANIC-PLASMA MODIFICATION, HEAT-PROTECTIVE COATING, JET-ABRASIVE TREATMENT, AVERAGE ROUGHNESS, COEFFICIENT OF FRICTION. |
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1Автор для ведения переписки |
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- Состояние вопроса исследования и актуальность работы
Развитие современного машиностроения во многом обусловлено проблемой экономии топлива в двигателях внутреннего сгорания (ДВС). Поскольку на расход топлива влияют такие основные факторы, как температура в камере сгорания и тепловые напряжения на деталях цилиндропоршневой группы (ЦПГ), то существуют различные методы уменьшения влияния указанных факторов путем нанесения теплозащитных покрытий на поверхности элементов ЦПГ [1]. В этой связи одним из перспективных методов нанесения покрытий является метод гальвано-плазменной модификации (ГПМ) микродугового оксидирования (МДО) [2-4].
Технология формирования теплозащитных покрытий методом ГПМ, включает в себя технологию предварительной очистки поверхности сплава АК12ММгН, служащего подложкой, само формирование покрытия методом ГПМ и технологию финишной обработки детали с покрытием путем достижения необходимых характеристик точности и качества поверхности.
Кроме того, в случае ремонта изношенных деталей ЦПГ (рис. 1) до нанесения восстановительных покрытий требуется проводить обдув поверхности абразивным материалом, чтобы удалить нагары и мелкие дефекты поверхности, так как возникающая при этом шероховатость в
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