Investigation of Metal Air-Cooling Process as An Element of Thermal Processing

  • Biryukov Alexey Borisovich Department of Technical Thermophysics, Donetsk National Technical University, Donetsk, Donetsk Region, Ukraine
  • Gnitiev P. A. Department of Technical Thermophysics, Donetsk National Technical University, Donetsk, Donetsk Region, Ukraine
DOI: https://doi.org/10.18282/mpc.v1i2.575
Keywords: Air-cooling process, furnace, convective heat exchange, radiant heat exchange, mathematical modeling, ceramic fiber lining

Abstract

Background: Nowadays on metal tempering and annealing its air cooling (AC) is realized inside furnace with forced coolant delivery. Scientific tools lack for metal AC study and design is substantiated. The aim of this work is to investigate technological and design furnace parameters influence on metal AC duration, as well as disclosure of metal AC heat engineering regularities. Materials and method: For study mathematical model of metal AC is used. It bases on solving the differential non-stationary heat conductivity equation in one-dimensional form for cylindrical ingots and lining. Results: For three lining design types and different technological parameters operation acceleration possibility due to lining design change was studied. It is found that with ceramic fibers on walls and roof acceleration is 31-45% and with all lining made of ceramic fiber it is 44-52% as compared with fireclay brick lining. For a furnace with hearth of fireclay bricks and ceramic fiber on the walls and roof, convective component varies from 10 to 30%; for lining completely consisting of ceramic fibers it is 10 - 25%. When using fireclay brick lining parts their inner temperature is higher than for ceramic fiber up to 50 °C. Conclusions: Significant furnace lining materials type influence on metal AC intensity is proved. Heat removal mechanism on metal AC in furnace is disclosed, by establishing heat proportion directly removed from metal by convection. It is found that radiant heat transfer between metal and fireclay brick part of lining goes less intensively than with ceramic fiber part. 

References

Sanghoon Noh, Byoung-Kwon Choi, Chang-Hee Han, Suk Hoon Kang, Jinsung Jang, Yong-Hwan Jeong, Tae Kyu Kim, Effects of heat treatments on microstructures and mechanical properties of dual phase ods steels for high temperature strength, Nuclear Engineering and Technology, 2013, Vol. 45 (6), pp. 821-826

Seung Chul Baik, Ohjoon Kwon, Seong-Jun Park, Byung-Hee Hong, Kyu Hwan Oh, Analysis of heat transfer in hot rolled coils for optimum condition of forced cooling, Metals and Materials, 1999, Vol. 5, Issue 4, pp. 369–375

Fabio Gori, L. Bossi, On the cooling effect of an air jet along the surface of a cylinder, International Communications in Heat and Mass Transfer, 2000, Vol. 27(5), pp. 667-676

Гусовский В.Л. Методики расчета нагревательных и термических печей: учебно-справочное издание / В.Л. Гусовский, А.Е. Лифшиц. – М.: Теплотехник, 2004. – 400 с. (Gusovskij V.L. Metodiki rascheta nagrevatel'nyh i termicheskih pechej: uchebno-spravochnoe izdanie / V.L. Gusovskij, A.E. Lifshic. M.: Teplotehnik, 2004. – 400s).

Biryukov A.B., Voloshin A.I., Gnitiev P.A., Mathematical model for studying of metal air-cooling process in furnaces, Steel in Translation, 2015, Vol. 45(7), pp. 534-538

Biryukov A.B., Gnitiev P.A., Experimental investigation of convective heat exchange in chamber furnaces at heat treatment of cylindrical solids, Thermophysics and Aeromechanics, 2016, Vol. 23 (3), pp. 467-472

Biryukov A.B., Gnitiev P.A., Investigation of lining parameters impact onto metal air-cooling process in chamber furnace, Izvestiya Vysshikh Uchebnykh Zavedenij. Chernaya Metallurgiya, 2016, Vol. 59(11), pp. 759-763

Published
2019-05-22
How to Cite
Borisovich, B. A., & A., G. P. (2019). Investigation of Metal Air-Cooling Process as An Element of Thermal Processing. Materials Physics and Chemistry, 1(1), 35-40. https://doi.org/10.18282/mpc.v1i2.575
Issue
Vol. 1 No. 1 (2019)
Section
Original Research Articles

Copyright (c) 2019 Biryukov Alexey Borisovich et al.

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Authors contributing to this journal agree to publish their articles under the Creative Commons Attribution-Noncommercial 4.0 International License, allowing third parties to share their work (copy, distribute, transmit) and to adapt it, under the condition that the authors are given credit, that the work is not used for commercial purposes, and that in the event of reuse or distribution, the terms of this license are made clear. With this license, the authors hold the copyright without restrictions and are allowed to retain publishing rights without restrictions as long as this journal is the original publisher of the articles.