Shielding gas effect on the structure of variable polarity GMA weldbrazed joints of galvanised sheets

• Autorzy: Pfeifer T. , Winiowski A. , Pikuła J.

Identyfikatory

DOI

10.1515/amm-2017-0012

• Języki publikacji: EN

Abstrakty

EN

The article presents the course and results of tests aimed to determine the effect of shielding gas on the shape of a weldbraze and on the structure of weldbrazed joints made of thin galvanised sheets. Test joints were made using innovative VP GMA weldbrazing utilising variable current and voltage waveforms. The tests involved the use of 3 types of shielding gases and mixtures, i.e. Ar, Ar + 1% O2 and Ar + 18% CO₂, and required macro and microscopic metallographic examination of overlay brazes and weldbrazed joints. The tests conducted have revealed that the use of mixtures containing active gases, and CO₂ in particular, increases the heat input of a weldbrazing process, improves the wettability of sheets and the geometry of weldbrazes, yet it also favours greater coat damage in the joining area and causes partial melting of workpieces.

Słowa kluczowe

EN

arc weldbrazing; variable polarity GMA weldbrazing; weldbrazing of zinc coated sheets; shielding gas effect; weldbraze structure

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 1
• Strony: 91--98
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Pfeifer T.

• Institute of Welding, Poland, 16-18 Bł. Czesława Str., 44-100 Gliwice, Poland

autor

Winiowski A.

• Institute of Welding, Poland, 16-18 Bł. Czesława Str., 44-100 Gliwice, Poland

autor

Pikuła J.

• Institute of Welding, Poland, 16-18 Bł. Czesława Str., 44-100 Gliwice, Poland

Bibliografia

• [1] L. Quintino, G. Pimenta, D. Iordanescu, R. Miranda, N. Pepe, MIG brazing of galvanized thin sheet joints for automotive industry, Materials and Manufacturing Processes 21 (1), 63-73 (2006).
• [2] Examining GMA brazing of galvanized steel sheet joints for automotive industry. Brazing and soldering today - technology news, Welding Journal 85 (9), 64 (2006)
• [3] A. Grajcar, M. Różański, S. Stano, A. Kowalski, B. Grzegorczyk, Effect of Heat Input on Microstructure and Hardness Distribution of Laser Welded Si-Al TRIP-Type Steel, Advances in Materials Science and Engineering 2014, Article ID 658947, 8 pages, 2014.
• [4] W. Gawrysiuk, T. Pfeifer, A. Winiowski, Characterization of MIG/ MAG arc weld brazing, Welding Technology Review (2-3), 17-20 (2005).
• [5] M. Różański, W. Gawrysiuk, MIG/MAG Braze Welding - galvanized steel sheets and examples of difficult to weld material sets, Welding Technology Review (9), 7-12 (2007).
• [6] A. Kiszka, T. Pfeifer, Variable polarity MAG welding of thin protective-coated steel plates, Institute of Welding Bulletin (1), 33-39 (2012).
• [7] J. Matusiak, J. Wyciślik, Influence of shielding gas on fume and gas emission during arc weld brazing of steel sheets with coatings. Metalurgija 54 (1), 71-74 (2015).
• [8] P. Białucki, A. Ambroziak, W. Derlukiewicz, A. Lange, M. Glezman, Properties of braze welded joints between aluminum and steel, Welding Technology Review 9, 40-44 (2013)
• [9] Joseph, C. Webb, M. Harama, D. Yap, Variable polarity improves weld brazing of galvanized sheet, Welding Journal 80 (10), 36-41 (2001).
• [10] D. Iordachescu, L. Quintino, R. Miranda, G. Pimenta, Influence of shielding gases and process parameters on metal transfer and bead shape in MIG brazed joints of the thin zinc coated steel plates, Materials and Design 27 (5), 381-390 (2006).
• [11] L. Rui-feng, Y. Zhui-shui, Q. Kai, Interfacial structure and joint strengthening in arc brazed galvanized steels with copper based filler, Transactions of Nonferrous Metals Society of China 16 (2), 397-401 (2006).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).