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DOI: 10.15862/02TS417 (https://doi.org/10.15862/02TS417)

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Dianov K.A., Loktev D.A., Lyudagovskii A.V., Polukhin V.A., Sokolov V.S. [Simulation of temperature fields during welding using a linear heat source] Russian Journal of Transport Engineering, 2017, Vol. 4, No. 4. Available at: https://t-s.today/PDF/02TS417.pdf (in Russian). DOI: 10.15862/02TS417

Simulation of temperature fields during welding using a linear heat source

Dianov Kharis Akhmyatovich
Russian university of transport (MIIT), Russia, Moscow
E-mail: dha@inbox.ru

Loktev Daniil Alexeevich
Moscow state university of civil engineering (national research university), Russia, Moscow
E-mail: loktevdan@yandex.ru

Lyudagovskii Andrei Vasil’evich
Russian university of transport (MIIT), Russia, Moscow
E-mail: avl832@mail.ru

Polukhin Vladimir Anatol’evich
Russian university of transport (MIIT), Russia, Moscow
E-mail: avl832@mail.ru

Sokolov Valerii Serafimovich
Russian university of transport (MIIT), Russia, Moscow
E-mail: prtlokt@yandex.ru

Abstract. The article discusses the fact that in surfacing in the system «coating-substrate», zones of local melting of the matrix (base metal) are possible. Along with the processes of ensuring the strength of the connection at the boundary of the medium, the change in the temperatures on the surface of the deposited base and the presence of penetration zones is interested, which is very important for surfacing thin-walled products.

The computational analysis carried out in the study suggests that, with the heat flow and the thermophysical properties of the coating and substrate unchanged, the temperature fields are completely dependent on the time of action of the source and the thickness of the deposited layer and part.

Implemented computational algorithm allows to determine the changes of temperature fields in the spot of heating is not only varying the time of operation of the source and the thickness of the deposited layer and the substrate, but including the change in current density, current strength, voltage, all thermophysical quantities. As calculations have shown the specific heat flow within the spot is not highly uniform. Its largest value occurs at the center of the spot and the middle part, the closer to the edge of the stain sharply decreases. Therefore, the temperature at the center of the spot differs from the temperature of its boundaries. To melt all the elements of the coating and the substrate, it is necessary to achieve a certain temperature along the radius of the entire spot.

Keywords: thermal properties; restoration of parts; the linear source of heat; simulation of heat; equivalent conductivity; temperature field; the time of surfacing

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