Optimization of Medium Carbon Steel Welding Joint by Hot-Wire Gas Tungsten Arc Welding Using the Taguchi Method
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Abstract
Taguchi was a technique for designing and conducting experiments as a process of searching for the results obtained from experimental factors. Taguchi method was used for the Orthogonal array. Using the signal-to-noise ratio (S/N Ratio), which measures both the S/N Ratio of the number of variables in the response, and to get as close as possible to the mean of the desired target response. Therefore, this research has applied the Taguchi method to design an experiment to study the optimum factor of hot-wire tungsten arc gas welding process on medium carbon steel for the impact energy of the weld. By studying the factors of the process, such as welding current, hot wire current and welding speed. From the experiment, it was found that the optimum welding, the welding current of 150 Amp, the hot wire current of 180 Amp. and 100 mm/min of welding speed, the average maximum impact energy of 56.40 Joule and the S/N ratio is 35.02. In the repeated experiment, it was found that the values were close to the first experiment by calculating with Taguchi method, which was considered acceptable by estimated model coefficients of 97.37 %. Therefore, the Taguchi method can be used to design an efficient of hot-wire gas tungsten arc welding process on medium carbon joint.
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Articles published in Journal of Industrial Technology Ubon Ratchathani Rajabhat University both hard copy and electronically are belonged to the Journal.
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