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Russian Metallurgy (Metally)

, Volume 2018, Issue 8, pp 783–786 | Cite as

Modifiing Effect of Zirconia Nanoparticles during Electric Arc Welding

  • A. B. Finkel’shtein
  • V. V. Kartashev
  • M. V. Fominykh
  • E. I. Denisova
  • A. V. Berezovskii
Article
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Abstract

The structure of the weld metal after welding using a flux-cored wire with the addition of 0.3% zirconia flaky nanoparticles is studied. The weld consists of an acicular ferrite. This finding can indicate that the dissociation of zirconia in an electric arc is not an obstacle to a modifying effect, which manifests itself in both the interaction of zirconium with oxygen and the surface activity of zirconium in an iron-based solidifying melt. Thus, zirconia is a modifier of both the first and second kinds for the solidifying weld metal. Excess oxygen is likely to form individual pores less than 1 μm in diameter in the weld metal; however, they only wealy affect the mechanical properties of the welded joint. These results will be used to develop electrode materials for welding pipe steels.

Keywords: electric arc welding nanoparticles zirconia modification acicular ferrite 

Notes

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • A. B. Finkel’shtein
    • 1
  • V. V. Kartashev
    • 1
  • M. V. Fominykh
    • 1
  • E. I. Denisova
    • 1
  • A. V. Berezovskii
    • 1
  1. 1.Ural Federal University,YekaterinburgRussia

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