Experimental Investigation For Process Parameter Optimization Of Rotating Arc Welding Of A106 Pipe

Rotating Arc Welding (RAW) is a solid-state welding technology that uses a high-speed rotating arc to provide heating effect to form a weld. When compared to other standard welding procedures for pipe welding, this method takes less time and consumes less electricity. This study was conducted to investigate the joining of ASTM A106 grade B steel pipes using RAW method. The experiments were carried out by using a custom-designed and developed RAW welding setup. The trials involved changing the process parameters and understanding their impact on the joint strength and hardness in order to determine their optimal range. The key parameters considered in this study were welding current, upsetting pressure, and welding time. It is observed that the welding current has a considerable influence on the mechanical properties of the welds. A higher welding current of 220A resulted in a lower tensile strength but higher hardness when compared to welding current of 190A. The optimal tensile strength was obtained with a welding current of 190 A, at an arc rotation time of 30 s and an upsetting pressure of 6 MPa.