vestiftИзвестия Национальной академии наук Беларуси. Серия физико-технических наукProceedings of the National Academy of Sciences of Belarus. Physical-technical series1561-83582524-244XThe Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8358-2022-67-1-7-16vestift-716Research ArticleМАТЕРИАЛОВЕДЕНИЕ, МЕТАЛЛУРГИЯMATERIALS SCIENCES AND ENGINEERING, METALLURGYОпределение возможности модернизации системы на основе дугового плазмотрона для газотермического напыления керамических материалов с использованием топливного вихревого интенсификатора. Часть II: Теплотехническая оценка и экспериментальное тестированиеCharacterization of opportunity for upgrading of the system based on arc plasma torch for thermal spaying of ceramic materials, by means of use of fuel vortex intensifier. Part II. Thermal engineering estimation and experimental testingДевойноО. Г.DevoinoO. G.

Девойно Олег Георгиевич – доктор технических наук, профессор, заведующий отраслевой научно-исследовательской лабораторией плазменных и лазерных технологий, филиал БНТУ «Научно-исследовательский политехнический институт»

пр. Независимости, 65, 220013, Минск

Oleg G. Devoino – Dr. Sc. (Engineering), Professor, Head of Plasma and Laser Technology Laboratory

65, Nezavisimosti Ave., 220013, Minsk 

devoino-o@mail.ruГорбуновА. В.GorbunovA. V.

Горбунов Андрей Васильевич – кандидат технических наук, приглашенный профессор, лаборатория плазмы и процессов Факультета физики

ITA-CTA, Сан-Жозе-дус-Кампос, 12228-900, Сан Паулу

Web of Science Researcher ID: R-2138-2019

Andrej V. Gorbunov – Ph. D. (Engineering), Visiting Professor, Plasmas and Processes Laboratory

São José dos Campos, 12228-900, SP

Web of Science Researcher ID: R-2138-2019 

gorbunov.ita@gmail.comВолодькоА. С.Volod’koA. S.

Володько Александр Сергеевич – научный сотрудник, отраслевая научно-исследовательская лаборатория плазменных и лазерных технологий, филиал БНТУ «Научно-исследовательский политехнический институт»

пр. Независимости, 65, 220013, Минск

Aleksandr S. Volod’ko – Researcher, Plasma and Laser Technology Laboratory

65, Nezavisimosti Ave., 220013, Minsk 

nilusko@tut.byЯцкевичО. К.YatskevichO. K.

Яцкевич Ольга Константиновна – кандидат технических наук, доцент, заведующий кафедрой «Технологическое оборудование», машиностроительный факультет

пр. Независимости, 65, 220013, Минск

Olga K. Yatskevich – Ph. D. (Engineering), Assistant Professor, Head of Department of Technological Equipment

65, Nezavisimosti Ave., 220013, Minsk 

mtools@bntu.byГорбуноваВ. А.GorbunovaV. A.

Горбунова Вера Алексеевна – кандидат химических наук, доцент, факультет горного дела и инженерной экологии

пр. Независимости, 65, 220013, Минск

Vera A. Gorbunova – Ph. D. (Chemistry), Assistant Professor, Department of Engineering Ecology

65, Nezavisimosti Ave., 220013, Minsk 

vgveragorbunova@mail.ruБелорусский национальный технический университетBelarusian National Technical UniversityТехнологический институт аэронавтикиAeronautics Institute of Technology202206042022671716Copyright © Девойно О.Г., Горбунов А.В., Володько А.С., Яцкевич О.К., Горбунова В.А., 20222022Девойно О.Г., Горбунов А.В., Володько А.С., Яцкевич О.К., Горбунова В.А.Devoino O.G., Gorbunov A.V., Volod’ko A.S., Yatskevich O.K., Gorbunova V.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestift.belnauka.by/jour/article/view/716

К основным тенденциям в технологиях газотермического напыления керамических покрытий, наряду с оптимизацией их свойств, относится и снижение энергоемкости процесса. При этом одно из направлений в данных процессах с плазмой – это разработка новых их вариантов с использованием введения в теплоноситель недорогих смесей углеводородов с окислителем. Для решения этой задачи рассмотрена возможность модернизации промышленной системы для напыления порошковых материалов на основе дугового плазмотрона на 25–40 кВт путем применения пробного варианта топливного газо-вихревого интенсификатора. При этом сделана упрощенная теплотехническая оценка возможных параметров генерируемой высокотемпературной струи плазмотрона с данным интенсификатором для сравнения с термодинамическими данными по применимости данных систем с целью формирования оксидных и карбидных покрытий (на примере Al2O3, Cr3C2 и других порошков), а также газодинамический и тепловой расчет режимов плазменно-топливного интенсификатора в такой системе. Изученные новые режимы – имитаторы напыления Al2O3, имеют преимущество над азотно-плазменными режимами с точки зрения кинетического параметра нагрева порошков – фактора нагревательной способности (ability of heating factor, AHF) газовой среды. С учетом полученных данных выполнена разработка экспериментальной системы на базе стандартной установки напыления УПУ-3Д с интенсификатором выбранной конструкции и проведено тестирование ее работы при мощности 30 ±2 кВт и сочетании газов: азота и смеси сжиженного газа (пропан-бутана) с воздухом. Система показала стабильную работу в определенном интервале параметров и, согласно результатам предварительных калориметрических измерений и фоторегистрации струй, обеспечивает внешнее энерговыделение от выходящей из плазмотрона с топливной насадкой струи больше на 30–35 % по сравнению с вариантом работы данного нагревателя с азотной плазмой при той же мощности на дуге. Использование системы открывает возможность для напыления как карбидных, так и оксидных порошков при повышенной производительности получения покрытий в сравнении с традиционными режимами промышленных установок на азотной или аргоновой плазме.

The main trends in the field of improving thermal spraying processes for ceramic coatings formation is, along with enhancement of coating properties, also the reducing the energy consumption for the process. In this regard, one of the important directions for improving these technologies with plasma is the development of their new versions, using the principle of adding inexpensive fuel-oxidizing mixtures based on hydrocarbons (natural gas, liquefied gas) with air. This type of plasma-fuel type of spraying will be promising for application at the present time, first of all, in order to obtain refractory functional coatings. For this purpose, the opportunity for upgrading an industrial unit/system for plasma spraying of powder materials with arc plasma torch of 25–40 kW power was investigated with the use of experimental variant of a fuel gas-vortex intensifier. Herewith the thermal engineering assessment for possible parameters of the generated high-temperature flow from the torch with this intensifier was carried out to compare these with established thermodynamic characteristics on the applicability range of this system for optimization of the oxide and carbide coating spraying process (using the examples of Al2O3, Cr3C2 and other powders); and gas dynamic and heat transfer calculations of the intensifier operating regimes in this model unit was also performed. New regimes, which were analyzed in our research as the simulants of Al2O3 spraying, have the advantage over the N2-plasma regimes from the point of view of such kinetic parameter of powder processing as ability of heating factor of hot gas medium. Taking into account the calculated data, the experimental system was developed based on the standard spraying unit UPU-3D with a fuel intensifier of the selected design and the preliminary testing of its operation was carried out at the power of 30±2 kW under the following combination of gases in the torch: nitrogen and mixture of liquefied petroleum gas with air. This system has shown the stable operation in certain range of parameters and, according to the zonal calorimetrical measurement and photo-registration of jets, it provides 30–35 % more energy emission from torch generated jet (with attached fuel vortex chamber) in atmospheric conditions, in a comparison with the torch regime with pure N2-plasma with the same power on the arc of plasma heater. Use of the system creates an opportunity to spray carbide powders as well as oxide ones at improved intensity of coating producing in a comparison with standard regimes of commercial spraying units with N2 or Ar plasmas.

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The authors declare that there are no conflicts of interest present.