Study of flux-cored arc welding processes for mild steel hardfacing by applying high-speed imaging and a semi-empirical approach

Study of flux-cored arc welding processes for mild steel hardfacing by applying high-speed... Arc welding processes with flux-cored wire electrodes are often applied for steel hardfacing. The optimal choice of the process parameters is a key issue for the process stability and the surface quality of the weld seam. However, this complex as a relation between the process characteristics, the predominant mechanisms of the arc, the material transfer, the solidification of the molten pool, the metallurgical properties and therefore the wear behaviour of the weld seam surface is not well studied. Synchronous high-speed imaging with spectral filters and different viewing angles is used for a detailed analysis of the arc attachment at the wire electrode, the wire melting and the behaviour of the weld pool. Two different gas metal arc welding processes, a pulsed process without short circuits and a modified short arc process, and different flux-cored wire electrodes have been used. All the combinations have been studied under different shielding gases: mixtures of Ar with CO2, O2 or He. Macrosections have been used to characterize seam width and dilution. Vickers hardness (HV 0.1) was tested to quantify the hardness of the different phases. The modified short arc processes have turned out to be more stable and go along with a reduced energy transfer to the substrate. As a consequence of the lower energy input, the short arc processes cause a lower dilution but a poor weld seam geometry in comparison with the pulsed processes. The choice of the shielding gas has a significant impact on the melting of the wire and the weld pool behaviour in particular in case of the modified short arc processes. A flatter and regular seam but with more coarse-grained surface structure is obtained with larger admixture of a molecular gas in the shielding gas flow. A semi-empirical approach of the correlation of power input and weld seam geometry demonstrates the potential decrease of the dilution and only smaller changes of the seam form factor by decreasing the electric power of a pulsed process. Welding in the World Springer Journals

Study of flux-cored arc welding processes for mild steel hardfacing by applying high-speed imaging and a semi-empirical approach

Loading next page...
Springer Berlin Heidelberg
Copyright © 2017 by International Institute of Welding
Materials Science; Metallic Materials; Continuum Mechanics and Mechanics of Materials; Theoretical and Applied Mechanics
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial