Abstract
Longitudinal bending deformation and angular distortion were influenced by the welding sequence. Its magnitude was the smallest in the case when welding was continuously performed from one side to the other side. But, angular distortion was different for left and right sides. Longitudinal bending deformation was not so greatly influenced by changing of the welding speed or the heat input. However, angular distortion was largely influenced. When the heat input exceeded the certain value, angular distortion conversely became small. Residual stress?D? (component of welding line direction) became large when the welding speed became fast or the heat input became large.
