Study on the Influence of Groove shape on the Tensile Strength of Commercial Steel

Abstract

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. Input factors
such as welding current, welding voltage, Gas flow rate, wire feed speed (WFS), 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 welding voltage, WFS and groove shape. X groove weldments obtained lower tensile
strength and hardness than V groove weldments. Taguchi's design is to determine the optimal
process factors for higher tensile strength and hardness. The analysis found that welding groove
shape had the highest effect on tensile strength and hardness of the welding, followed by
voltage. WFS had the lowest influence on tensile strength and hardness. The optimized
combination of welding factors is V groove shape, 20 V and 5.9 m/min WFS