Laser Surface Treatment of Laser Welded Duplex Stainless Steel

  • Edoardo Capello
  • Moreno Castelnuovo
  • Barbara Previtali
  • Maurizio Vedani
Conference paper

Abstract

It is well known that,. when Duplex Stainless Steel are welded, the optimally balanced structure of 50α–50γ is lost, yielding to a ferrite rich bead.

In the paper the problem of recovering the laser welded microstructure of duplex stainless steel is investigated by means of a laser treatment approach. A procedure to determine the processing window is presented. The conditions to obtain the desired microstructure have been identified, based on evaluation of two critical thermal parameters, the peak temperature and the cooling rate by an analytical thermal model.

Experiments performed on a 2.11 mm thick plate of a 22Cr-5Ni-3Mo duplex stainless steel, allowed to successfully recover the welded beads by using the calcuated thermal conditions, showing that the proposed solution could be a helpful tool to reduce the number of iterations usually needed by the traditional experimental approach.

Keywords

Laser Weld Duplex Stainless Steel Weld Bead Post Weld Heat Treatment Laser Surface Treatment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

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Copyright information

© Springer-Verlag London Limited 2004

Authors and Affiliations

  • Edoardo Capello
    • 1
  • Moreno Castelnuovo
    • 1
  • Barbara Previtali
    • 1
  • Maurizio Vedani
    • 1
  1. 1.Politecnico di Milano Dipartimento di MeccanicaMilanoItaly

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