THERMAL CALCULATION OF THE INDUCTION HEATING MODE OF THE SURFACES RESTORED BY ELECTRIC CONTACT SURFACING
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2018, Vol 82, Issue
Abstract
Problem. The presence of a heterogeneous structure in the surface layer results in a decrease in the re-sistance of parts operating under conditions of stress concentration. Therefore, the improvement of the operational stability of fast-wearing machine parts through the use of combined treatment technologies is required. To obtain the specified characteristics of the restored parts, it is necessary to gradually change the properties in a certain se-quence with a gradual approximation of the charac-teristic values to the specified ones. The staging is due to the fact that, on the one hand, it is impossible to change all the dissimilar properties of parts with one method at the same time and, on the other hand, to obtain the whole complex of necessary values of the resulting parameters at one stage. An urgent task is to improve the operational durability of parts through the use of combined technologies using induction treatment of the deposited layer. Goal. The purpose of this work is to determine the parame-ters of the heating mode for induction treatment of surfaces restored by electric contact surfacing with a given temperature distribution over the depth of the restored working surface of cylindrical parts with a diameter of 50 ... 120 mm. Methodology. An analytical solution of the heating problem with the specified parameters of the speed and depth of heating of the surface layer of the reconditioned product was made. Results. The induction heating mode at a constant power density was proposed and analytically investigated. Given ratios allows determining the main parameters of heating to ensure calculation of the inductor for the normalization of the re-constructed surface of cylindrical parts. Scientific novelty. The proposed induction heating mode is intermediate between the quenching and cross-cutting heating and can simultaneously obtain the required temperatures at the surface and at a prede-termined depth of the heated layer of cylindrical parts with a diameter of 50-120 mm with the normalization of their surfaces restored with electric contact surfacing. Practical value. The results of the analytical calculation of the parameters of the induction heating mode for the normalization of the surface layer of the restored cylindrical parts allow the inductor to be calculated and the generator selected for combined surface treatment.
Authors and Affiliations
O. V. Berezhnaia, V. D. Kassov
Keywords
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- EP ID EP475101
- DOI 10.30977/BUL.2219-5548.2018.82.0.35
- Views 65
- Downloads 0
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