Pengaruh besaran arus dan kecepatan las terhadap angular distorsi pada SS304 dengan GMAW

Abstract

SS304 is a steel with good corrosion resistance, so it is widely used in various industrial worlds. The stainless-steel fabrication process generally uses a joining process by welding. To get a good welding result, it is necessary to choose the correct parameters to reduce the potential for welding imperfections. In the ISO 6520-1-520 standard, excessive distortion is a welding imperfection that must be avoided because it can cause angular misalignment, namely ISO 6520-1-508 standard. In this research, an experiment was conducted to determine the effect of current strength and welding speed on the angular distortion generated using GMAW. The current strength is 115, 120, and 125 A, while the welding speed is 3.6, 3.9, and 4.2mm/s. The angular distortion of the weld results is measured using a CMM (Coordinate Measuring Machine) after the material has experienced natural cooling. From the research results obtained, it is known that the greater the current strength, the greater the resulting angular distortion. On the other hand, if the welding speed is greater, the width of the weld bead and the resulting angular distortion will be smaller.