2022 №01 (03) DOI of Article
2022 №01 (05)

The Paton Welding Journal 2022 #01
The Paton Welding Journal, 2022, #1, 18-21 pages

Improvement of the mechanical properties and corrosion resistance of laser welds on thick duplex plates by laser cladded buttering

A. Straße, A. Gumenyuk, M. Rethmeier

Bundesanstalt für Materialforschung und -prüfung (BAM) Unter den Eichen 87, 12205 Berlin, Germany

Because of its excellent corrosion resistance, high tensile strength and high ductility, duplex stainless steel 2205 offers many areas of application. Though laser beam welding accompanied by high cooling rates, duplex steels tend to perform higher ferrite contents in weld metal as the base metal, which leads to a reduction of ductility and corrosion resistance of the weld joint. To overcome this problem, a solution, based on buttering the plate edges by laser metal deposition (LMD) with material containing higher Ni concentrations prior to laser welding was suggested. In this context different process parameters for LMD process were investigated. In a second step the possibility of welding those edges defect free while achieving balanced austenite-ferrite ratio was verified with metallographic analysis, Electron Backscatter Diffraction (EBSD) and impact testing according to Charpy. The improved corrosion resistance was observed with ASTM G48 standard test method.
Keywords: laser metal deposition, laser beam welding, duplex stainless steel

Received: 28.10.2021
Accepted: 07.02.2022


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