International Science and Technology Journal

In industry, welding is well known. There is a great demand for effective and quality welding. Manufacturers seek to remain competitive in the market. They rely on their manufacturing engineers and production personnel to quickly and effectively set up manufacturing processes for new products. GMAW is one of the most widely used processes in the industry. The input factors such as welding current, welding voltage, Gas flow rate, wire feed rate, wire size and welding speed play a significant role in determining the welding quality. Taguchi's design has been a powerful and efficient optimization tool for better quality and performance output of manufacturing processes. In this study, GMAW has welded commercial steel under preset factors of base metal thickness, welding voltage and wire feed speed. Taguchi's design is to determine the optimal process factors for higher tensile strength and hardness. The analysis found that thickness had the highest effect on tensile strength and hardness of the welding, followed by wire feed speed voltage. The wire feed speed had the lowest influence on the tensile strength and hardness. It can conclude that the optimized combination is the base metal thickness of 10 mm, the voltage of 20 V and wire feed speed of 5.9 m/min