Analysis of erosion susceptibility for tungsten electrodes in submerged arc welding

DOI

10.2991/avent-18.2018.6How to use a DOI?

Keywords

TIG welding, gas tungsten arc welding, submerged arc, tungsten electrode erosion, titanium welds, inclusions

Abstract

The article presents the results of studies on the influence of additives increasing stabilizing properties of the arc in the chemistry of tungsten electrodes on the erosion of their tips under SAW. Erosion and crown formation cause weld defects. Severe welding conditions are due to high temperatures of the tip in an enclosed volume. The influence of the chemistry of tungsten electrodes on the erosion wear and crown formation was identified. Lanthanum oxide (0,8 – 1,4%), yttrium oxide (2,4 – 3,5 %) and pure tungsten electrodes were used for the experiments. The X-ray method was used to identify the presence of tungsten inclusions in Ti-Al-Zn weld joints. A thermal mechanical model describing the destruction of alloying metal electrodes and weld defect (tungsten inclusion) formation was developed. The experiments showed the possibility and efficiency of using pure tungsten electrodes under SAW based on the author’s method involving stabilization of the arc discharge due to a special shielding gas feeding scheme

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Natala Astafeva
AU  - Anatoliy Astafev
PY  - 2018/05
DA  - 2018/05
TI  - Analysis of erosion susceptibility for tungsten electrodes in submerged arc welding
BT  - Proceedings of the International Conference "Aviamechanical engineering and transport" (AVENT 2018)
PB  - Atlantis Press
SP  - 30
EP  - 34
SN  - 2352-5401
UR  - https://doi.org/10.2991/avent-18.2018.6
DO  - 10.2991/avent-18.2018.6
ID  - Astafeva2018/05
ER  -