Significance of the brazing gap in the brazing of aluminium heat exchangers for automotive industry
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Abstract
The paper presents the influence of the brazing gap width on the structure of bonded joints during the production of aluminum heat exchangers, using brazing technology, in tunnel furnaces with controlled atmosphere. Based on the wedge test, an analysis and qualitative assessment of brazed joints was made for the changing width of the brazing gap and the filler metal used. For the received brazed joints, metallographic tests were carried out using light and electron microscopy (SEM) and microhardness measurements in the characteristic areas of brazed joints. Based on the results obtained, the recommended width of the brazing gap was determined.
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How to Cite
[1]
Z. Mirski, J. Pabian, T. Wojdat, and J. Hejna, “Significance of the brazing gap in the brazing of aluminium heat exchangers for automotive industry”, Weld. Tech. Rev., vol. 92, no. 4, pp. 7-14, May 2020.
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Original Articles
This work is licensed under a Creative Commons Attribution 4.0 International License.
References
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Nylén M., Gustavsson U., Hutchinson W.B., Örtnäs A., Mechanistic Studies of Brazing in Clad Aluminium Alloy. Materials Science Forum, 1996, Vol. 217-222, 1703–1708. https://doi.org/10.4028/www.scientific.net/MSF.217 222.1703
Iordache D.M., Ducu C.M., Niţu E.L., Iacomi D., Plăiaşu A.G., Preliminary study on the microstructure and mechanical properties of dissimilar joints of aluminum alloy and pure copper by FSW. MATEC Web of Conferences, 2017, Vol. 112, 1-6, 04005.
Frąckowiak E., Mroziński W., Using flame brazing technology for producing aluminum automotive heat exchangers. Welding Technology Review, 2007, Vol. 79(9), 57-62.
Controlled Atmosphere Aluminum Brazing Systems - SECO/WARWICK. Available online: https://www.secowarwick.com/wp-content/uploads/assets/Documents/Brochures/Controlled-Atm-Alum- Brazing-Systems.pdf (accessed on 12-02-2020).
Mirski Z., Granat K., Misiek A., Brazing of aluminum heat exchangers in the automotive industry. Spajanie materiałów konstrukcyjnych, 2015, Vol. 28(2), 32–34.
Pilarczyk J. (editor), Engineer's Guide, Vol. 2, Welding., WNT: Warszawa, Poland, 2014,
The NOCOLOK® Flux Brazing Process - Solvay Flux GmbH. Available online: https://www.solvay.com/sites/g/files/srpend221/files/tridion/documents/NOCOLOK-Brazing-Process-2018-02.pdf (accessed on 12-02-2020).
Mirski Z., Control of the width of brazed joint clearance in the processes of joining dissimilar materials. Monography No 22, Prace Naukowe Instytutu Technologii Maszyn i Automatyzacji Politechniki Wrocławskiej, Wrocław, Poland, 2000.
NOCOLOK® Encyclopedia ‒ Solvay Flux GmbH. Available online: https://www.aluminium-brazing.com/sponsor/nocolok/Files/PDFs/NOCOLOK-Encyclopedia-2013.pdf (accessed on 12-02-2020).
Wasilewski P., Silumines - modification and its influence on structure and properties, Monography No 21, Polish Academy of Sciences: Katowice, Poland, 1995.
Velu P.K., Study of the effect of brazing on mechanical properties of aluminum alloys for automotive heat exchangers. Master’s thesis, Purdue University, Purdue (IN), May 2017.
Nylén M., Gustavsson U., Hutchinson W.B., Karlsson Å., Johansson H., Mechanisms of erosion during brazing of aluminium alloys. Materials Science Forum, 2002, Vol. 396-402, 1585–1590. https://doi.org/10.4028/www.scientific.net/MSF.396-402.1585
Nylén M., Gustavsson U., Hutchinson W.B., Örtnäs A., Mechanistic Studies of Brazing in Clad Aluminium Alloy. Materials Science Forum, 1996, Vol. 217-222, 1703–1708. https://doi.org/10.4028/www.scientific.net/MSF.217 222.1703
Iordache D.M., Ducu C.M., Niţu E.L., Iacomi D., Plăiaşu A.G., Preliminary study on the microstructure and mechanical properties of dissimilar joints of aluminum alloy and pure copper by FSW. MATEC Web of Conferences, 2017, Vol. 112, 1-6, 04005.
Frąckowiak E., Mroziński W., Using flame brazing technology for producing aluminum automotive heat exchangers. Welding Technology Review, 2007, Vol. 79(9), 57-62.