Affiliation:
1. Technische Universitat Braunschweig
2. Technische Universität Braunschweig Fakultät für Maschinenbau: Technische Universitat Braunschweig Fakultat fur Maschinenbau
3. Miskolci Egyetem
Abstract
Abstract
This study provides an insight into the microstructural and mechanical properties of an electron beam welded 2507 super duplex stainless steel joint. To compensate the detrimental effect of the nitrogen loss and the cooling conditions on the austenite formation, nickel-based filler wire was fed to the weld pool to increase the amount of austenite stabilizers. A high-frequency beam oscillation combined with a multi-beam technique was applied to realize a good dilution between the base metal and the filler wire even at a large depth-to-width ratio. As a result, a good austenite-ferrite-ratio was achieved in the weld metal, leading to an impact energy of 200–230 J. The heat-affected zone exhibited a balanced microstructure and a narrow width due to the high nitrogen content of the base metal.
Publisher
Research Square Platform LLC