High-strength steel welding with consumable double-electrode gas metal arc welding

K. H. Li, Y. M. Zhang, P. Xu, F. Q. Yang

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Low heat input is typically desired for welding high-strength steels to ensure that the mechanical behavior of material in the HAZ would not change significantly after welding. However, a high current, and thus a high heat input, is required to melt more wire to achieve a goal of increased productivity through increased deposition rate. A novel process referred to as Consumable Double-Electrode GMAW or DE-GMAW has been developed to increase the deposition rate without increasing the heat input. This work studies the characteristics of the heat-affected zone (HAZ) including the HAZ size, microstructure, and the hardness of high-strength steel ASTM A514 welded by DE-GMAW. It is found that, to obtain the same deposition rate, the DEGMAW process can significantly decrease the heat input using a low base metal current, in comparison with conventional GMAW, to achieve a small HAZ and low joint penetration. The low heat input caused a fast cooling rate and high hardness in the HAZ.

Original languageEnglish
Pages (from-to)57-s-64-s
JournalWelding Journal (Miami, Fla)
Issue number3
StatePublished - Mar 2008


  • Deposition rate
  • Double electrode
  • HAZ
  • Heat input
  • High-strength steel
  • Indentation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys


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