MULTIPASS BUTT-WELDED JOINT HAVING EXCELLENT BRITTLE CRACK PROPAGATION RESISTANCE, AND WELDED STRUCTURE

摘要

Disclosed is a multipass butt-welded joint of a steel sheet, which has excellent brittle crack propagation resistance. In the joint, one or more weld layers or welding passes are arranged between a front welding layer and a rear welding layer in a separately spaced state from each other, wherein each of the weld layers or the welding passes has different properties from those of the surrounding materials and can inhibit and terminate the propagation of a brittle crack.