A Study on the Overlay Welding Process Optimization of GTAW by Double Torch

Title & Authors
A Study on the Overlay Welding Process Optimization of GTAW by Double Torch
Lim, Byung-Chul; Son, Young-San;

Abstract
In this study, GTAW was carried out on austenitic STS316 stainless steel. Overlay welding with the stellite-base filler metal was implemented using a double torch. The response variable was calculated on the measured Vickers hardness for process optimization using the Taguchi method and its response variable was then analyzed about effect on overlay welding characteristics. The optimal process design by the Taguchi method is extremely effective in the overlay welding process for the multiple response variables. In addition, the effects of contribution rate about each response variable was analyzed easily. The conditions of the optimal process were 105A, 18V, pre-heat treatment at $\small{200^{\circ}C}$, and post weld heat treatment at $\small{100^{\circ}C}$. The Vickers hardness of the specimens produced under the optimal condition of GTAW by the double torch was 8.19% higher than that by a single torch.
Keywords
Double torch;GTAW;Latin;Overlay welding;Surface hardening;Taguchi method;
Language
Korean
Cited by
References
1.
Lim. B. C., Kang. C. S. and Park. S. H., "Study of the welding monitor and characteristics according to a change in Gas mixture by FCAW," Journal of the Korea Academi-Industrial cooperation society, Vol. 15, No. 10, pp. 5933-5938, 2014. DOI: http://dx.doi.org/10.5762/KAIS.2014.15.10.5933

2.
Honma, S. G. and Yasuda, K. H., “Study of Semi-automatic TIG Welding,” Journal of japan welding society, Vol. 21, No. 3, pp. 356-361, 2003.

3.
Robert L. Mason, Richard F. gunst, James L. Hess, "Statistical Design and Analysis of Experiments, second Edition," A John Wiley and Sons Publication, Hoboken, New Jersey, pp. 406-409, 2003.

4.
Nooryusmiza Yusoff, M. Ramasamy, Suzana Yusup, "Taguchi's parametric design approach for the selection of optimization variables in a refrigerated gas plant," Chemical Engineering Research and Design, Volume 89, Issue 6, pp. 665-675, 2011. DOI: http://dx.doi.org/10.1016/j.cherd.2010.09.021

5.
Garima Kaushik, Indu Shekhar Thakur, 2009, "Isolation and characterization of distillery spent wash color reducing bacteria and process optimization by Taguchi approach," International Biodeterioration & Biodegradation, Volume 63, Issue 4, pp. 420-426, 2009. DOI: http://dx.doi.org/10.1016/j.ibiod.2008.11.007

6.
Kim, J.S., "Study on the Status of Welded Parts According to the Types of Shielding Gas in TIG Welding," Journal of the Korean Society of Manufacturing Process Engineers, Volume 14 No. 2, pp. 38-43, 2015. DOI: http://dx.doi.org/10.14775/ksmpe.2015.14.2.038