Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Analysis of the sharpening angle impact under the useful life of the Tungsten electrode used in automatic TIG Clad Welding Process
Submission Author:
Gabriel Krebs , PR
Co-Authors:
Milton Polli, Gabriel Krebs
Presenter: Gabriel Krebs
doi://10.26678/ABCM.COBEM2017.COB17-0511
Abstract
In this paper the TIG welding process (Tungsten Inert Gas) is used to cladding parts with Alloy 625 (Inconel® 625 - Ni/Cr/Mo alloy). The behaviour of the tungsten electrode was analyzed during an automatic process, changing the variables that have direct presence in its efficiency: sharpening angle, the flap at the tip of the electrode, and the inert gas flow that was used. The parts used as specimen were made of AISI 4130 80K Steel, and the electrode was the 4,0mm diameter Lanthanum 2%. The main aim was to seek the understanding of what would be the set composed by these three variables, that would provide a greater useful life for the electrode, this way reducing the sharpening times to which the electrode is subject and, as a consequence, reducing consumption and setup time. The analysis was made through DOE, with the help of Minitab 16. The results value collected correspond to the useful lifetime of each sharpening executed on the electrode tip, where the useful life limit was defined through the visual inspection of the weld bead deposition quality. As a consequence of this result, variables were known that can be considered essential to achieving this goal, and it was even possible to notice the influence of a variable with extreme importance to the execution of the process, but with no influence over the useful life of the electrode. Keywords: Useful life, Sharpening, Tungsten Electrode, DOE.
Keywords
Tungsten Electrode, useful life, DOE, Sharpening
