Comparison of penetration profiles of different TIG process

Sándor, Tamás and Dobránszky, János (2009) Comparison of penetration profiles of different TIG process. In: Stainless Steel World Conference 2009, 2009.11.10-2009.11.12, Maastricht.

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Abstract

The increasing productivity in industrial applications gets more and more into the focus of attention during the last decades. This intention is also present at the developments of welding technologies. TIG welding developments have also been parallel to the really heavy-duty welding processes (like MIG/MAG, SAW, Beam Weldings, etc.). Several TIG welding variants were developed due to these researches. In spite of the fact that a very wide literature of TIG welding process is well known, the number of those publications which write down exact equations between the different parameters is very low. The situation is even worse for the new TIG variants. Three TIG variant (using pure Argon, furthermore 70% Ar + 30% He as shielding gas, finally Activated TIG welding) are investigated and compared together in this paper. The comparison is executed from the penetration depth (D), the bead width (W), the penetration profile (D/W) and the weld bead cross section (A) point of view. This work makes an attempt to create an overall picture, which evaluates the effects of the welding parameters to the above properties. All experiments were executed on different thick AISI 304 / W.Nr. 1.4301 type austenitic stainless steel plates from 2 mm up to 6 mm thickness. This paper is intended as an introduction part of a wider job which will investigate the advanced TIG variations and their properties with the strongly determined purpose of making more precise the existing models of the so called ATIG phenomenon.

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