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Welding in the World

, Volume 61, Issue 2, pp 351–359 | Cite as

Studies on the pore formation in super duplex stainless steel welds

  • Juliane Stützer
  • Manuela Zinke
  • Sven Jüttner
Research Paper

Abstract

When welding super duplex stainless steels, a non-admissible pore formation can occur even if recommended processing guidelines are strictly followed. To investigate this phenomenon and to determine the influencing factors, different bead-on-plate welds were produced using gas metal arc welding and submerged arc welding. The welding consumables, the shielding gas, and the welding flux were varied. Additionally, the influences of heat input and interpass temperature were examined. The studies have shown that the shielding gas, the welding flux, and the filler metal have great influence on the pore formation. Even small variations in the chemical composition of the welding consumables lead to different results. In addition, the ferrite number and the chemical composition of the bead-on-plate welds strongly depend on the used shielding gases and filler metals. Furthermore, it became clear that the porosity of the weld metal can be affected by the welding speed.

Keywords (IIW Thesaurus)

Duplex stainless steels Porosity GMAW welding Submerged arc welding Process conditions Shielding gases Welding fluxes 

Notes

Acknowledgements

The IGF promotion plan (AiF-No. 18.390 BR / DVS-No. 01.089) of the Research Association on Welding and Allied Processes of the DVS, Aachener Straße 172, 40223 Düsseldorf has been funded by the AiF within the program for sponsorship by Industrial Joint Research (IGF) of the German Federal Ministry of Economic Affairs and Energy based on an enactment of the German Parliament. This support is gratefully appreciated.

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Copyright information

© International Institute of Welding 2017

Authors and Affiliations

  1. 1.Otto-von-Guericke University MagdeburgMagdeburgGermany

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