Experimental measurements of gas shielding characteristics in tig welding with a constricted nozzle

Satoshi Miki, Kyohei Konishi, Masaya Shigeta, Manabu Tanaka, Akihisa Murata, Tadasuke Murata

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this study, the oxygen contamination and the heat input on the anode surface were investigated by experimental measurements in order to guarantee a high-quality welding in TIG welding with a constricted nozzle. As a result, it was clarified that the energy density which was one of the heat source characteristics became higher at the center of the anode surface by attaching the constricted nozzle. Moreover, the oxygen concentration on the anode surface during TIG welding with constricted nozzle was as low as that during a conventional TIG welding. In addition, the oxygen concentration on the center of anode surface was changed by operating conditions such as a welding current and a shielding gas flow rate. Finally, the suitable welding condition was proposed from the tendency of the oxygen concentration on the anode surface, in which the oxygen concentration on the anode surface kept low.

Original languageEnglish
Pages (from-to)21-25
Number of pages5
JournalYosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society
Volume36
Issue number1
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • Constricted nozzle
  • Oxygen concentration
  • Plasma jets
  • Split-anode method
  • TIG

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Metals and Alloys

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