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TEMPERATURE FIELDS' ANALYSIS IN A PREHEATED STEEL PLATE
TREATED BY A MOVING BURNER
Aleksandr Prokhorov
candidate of Science, associate professor, branch of FSBEIHVE National Research
South Ural State University, Russia Ozersk
Svetlana Omelchenko
candidate ofpedagogic sciences, branch of FSBEI HVE National Research South
Ural State University, Russia Ozersk

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ABSTRACT
In the article there is proposed an approach of analytic determination of temperature fields in a steel plate taking into account preheating and heat transfer from the metal surface. Based on the received correlations there has been conducted a temperature analysis in a plate machined for flame scarfing of slabs' defects.
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Keywords: mathematical modeling; temperature field; heating; heat transfer.
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6. Osovets S.V., Toropov E.V., Prokhorov A.V., Kirillov V.L. Calculation of the unsteady thermal state of a slab heated by a moving source // Journal of Engineering Physics and Thermophysics. 2000. V. 73, 4. P. 745748.
7. Pashatskij N.V, Prokhorov A.V. Analytical model of the workpiece heating in plasma-mechanical processing // Welding international. 2001. 12. P. 2426.
8. Pashatskij N.V, Prokhorov A.V. Thermal processes in welding flat components. // Welding international. 2000. 14 (12). P. 979980.
9. Pashatskij N.V, Prokhorov A.V., Obesnyuk C.F. Calculation of the temperature fields of disk electrode upon electroerosion cutting // Welding international. 2003. 8. P. 3741.