Effect of Parameters on Weld Pool Geometry in 202 Stainless Steel Welded Joint Using Tungsten Inert Gas (TIG) Process
Mukesh1, Sanjeev Sharma2
1Mukesh, Department of Mechanical Engineering, HCTM Technical Campus, Kaithal, (Haryana) India.
2Sanjeev Sharma, Department of Mechanical Engineering, HCTMTechnical Campus, Kaithal, (Haryana), India.

Manuscript received on November 05, 2013. | Revised Manuscript received on November 2013 11, 2013. | Manuscript published on November 15, 2013. | PP: 25-31 | Volume-1 Issue-12, November 2013. | Retrieval Number: L05211111213/2013©BEIESP

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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Tungsten inert gas welding is found important in those applications where it is required to control the weld bead shape and metallurgical characteristics. To consider the quality characteristics, Taguchi method is applied in order to analyze the effect of each welding process parameters on the weld geometry. Orthogonal array L9 is applied for conduct the experimentation. Three input machine parameters namely current, welding speed and gas flow rate were varied at three different levels to find out the influence of parameters on weld bead geometry i.e. weld bead width and weld bead height. The quality and accuracy of the weld joint was studied along with microstructure. This paper deals with the study of weld bead geometry of austenitic stainless steel 202 using tungsten inert gas (TIG) welding. Experimental results are provided to illustrate the proposed approach and an optimal value of 0.35 mm is obtained in case of weld bead height and 8.63 mm in weld bead width. Microstructure of weld metal structure shows delta ferrite in matrix of austenite.
Keywords:GTAW welding, Stainless steel 202, TIG welding, Weld bead geometry, Taguchi method.