Microstructure and corrosion resistance of the duplex steel wide-gap one-side fluxcored wire welded joints

• Autorzy: Nowacki J. , Zając P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: this paper was to determine the impact of the wide-gap welding, with increased root face gap, on structure and corrosion properties of the welded joints executed on duplex steel by one-side welding on ceramic backings. Design/methodology/approach: In the described work, experiments were conducted to welding tests for selected joints, visual examinations, non-destructive testing of welded joints, X-ray examinations, and metallographic testing of welded joints. Findings: As a result of the performed inspection, decreasing of the ferrite content with the increase of the root face gap (increase of welding heat input) was observed. The minimum measured ferrite content was not lower than 28%, and the maximum value did not exceed 69% (the permissible range being from 25 to 70%). Research limitations/implications: Further studies on the impact of the wide-gap welding, with increased root face gap, on structure and corrosion properties of the welded joints are required. Practical implications: The performed tests and examinations of welded joints with root face gap ranging from 6 to 10 mm were intended for extending the standard range from 2 to 6 mm. Originality/value: The experimental program verified the testing methodology, and techniques of welding of the duplex steel with the wide-gap.

Słowa kluczowe

EN

welding; microstructure of welded joints; testing of welded joints

PL

spawanie; mikrostruktura łączenia spoiw; testowanie łączności spoiw

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2008
• Tom: Vol. 28, nr 2
• Strony: 191--198
• Opis fizyczny: Bibliogr. 14 poz., wykr.

Twórcy

autor

Nowacki J.

autor

Zając P.

• Institute of Materials Science and Engineering, Szczecin University of Technology, Al. Piastow 19, 70–310 Szczecin, Poland,

Bibliografia

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• [8] J. Nowacki, M. Urbański, P. Zając, Mechanizes and automated welding of T-shaped joints with groove welds of tanks from duplex steel in chemical cargo carrier builded in Szczecin Shipyard, Welding rewiew 01 (2007) 9-13.
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• [10] J. Nowacki, P. Zając, The influence of broad gap onesided welding by the use of flux-core wire of duplex steeel on teh structure and corrosion resistance of welded joints, Welding rewiev 2-3 (2006) 8-12.
• [11] J. Nowacki, P. Rybicki, Influence of shielding gas on padding welds geometry made using FCAW method on duplex steel, Proceedings of the 2nd International Conference and Exhibition "New Developments in Metallurgical Process Technology", Riva del Garda, 2004 (CD- Rom).
• [12] J. Nowacki, A. Łukojć, Structure and properties of heat affected zone of duplex steels joints, Proceedings of the 13thInternational Scientific Conference on Contemporary "Achievements in Mechanics, Manufacturing and Materials Engineering", AMME'2005, Gliwice-Wisła, 2005, 471-477.
• [13] J. Nowacki, P. Rybicki, Welding imperfections of submerged arc welded duplex steel joints in aspects of the welding heat input, Proceedings of the 13th International Scientific Conference on Contemporary "Achievements in Mechanics, Manufacturing and Materials Engineering" AMME'2005, Gliwice-Wisła, 2005, 475-480.
• [14] J. Nowacki, A. Łukojć, Structure and properties of heat affected zone of duplex steels joints, Proceedings of the 13thInternational Scientific Conference on Contemporary "Achievements in Mechanics, Manufacturing and Materials Engineering" AMME'2005, Gliwice-Wisła, 2005, 471-474.