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Author(s):	Geiger, Martin; Twiehaus, Thorsten; Klingschat, Sven; Geffers, Christoph
Title:
Abstract:	Im Rahmen der Untersuchungen wird ein Vergleich von Lichtbogenschweißverbindungen und Laserschweißverbindungen hinsichtlich ihrer statischen Festigkeiten erfolgen. Um einen praxisrelevanten Vergleich zu ermöglichen, werden die beiden Verfahren und deren Einfluss auf die Art der Ausführung der Verbindung berücksichtigt. Dies lässt sich am Beispiel der Kehlnaht erläutern. Während beim Lichtbogenschweißen Kehlnähte über ihr a-Maß charakterisiert werden, wird beim Laserschweißen ohne Zusatzwerkstoff verfahrensbedingt ein Vollanschluss zwischen Steg- und Gurtblech angestrebt. Ziel der Untersuchung ist, die verfahrensbedingt unterschiedlich ausgeführten Verbindungen hinsichtlich der erreichbaren statischen Festigkeiten zu untersuchen und die Ergebnisse gegenüberzustellen. Für Blechdicken < 6 mm erreichen alle Proben eine vergleichbare Festigkeit. Bei den einseitig lasergeschweißten 6-mm-Kehlnähten ist aufgrund der fehlenden Vollanbindung das Versagen in der Schweißnaht eingetreten. Comparison of the static strength of arc and laser welded joints - applications of unalloyed steel at butt joints and fillet weld joints in thin sheet metal applications Within the the scope of these investigations, a comparison of arc welded and laser beam welded joints will be carried out with focus on their achievable static strengths. To receive a comparison relevant to practical applications, the two welding processes and their influence on the joint design of the joint will be considered. This can be explained by using the example of the fillet weld. While in arc welding a fillet weld is usually characterized by their (design throat thickness) a-measurement, in laser beam welding without filler material a full connection between web and base plate is usually aimed. The aim of this investigation is to examine the welded joints, which are designed differently depending on the welding process, about the respective achievable static strengths and to compare the results. For sheet thicknesses < 6 mm, all samples achieve comparable strength. In the case of the 6 mm fillet welds, laser welded on one side, failure has occurred in the weld due to the lack of a full bond connection.
Source:	Stahlbau 90 (2021), No. 7
Page/s:	517-527
Language of Publication:	German

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