STEEL PLATE WELD JOINT AND WELD STRUCTURE HAVING EXCELLENT BRITTLE CRACK PROPAGATION RESISTANCE

摘要

PROBLEM TO BE SOLVED: To provide a steel plate weld joint and a welded structure having excellent brittle crack propagation resistance capable of suppressing propagation of any brittle crack in the weld joint or a base metal, and preventing any breakage of the welded structure even when the brittle crack is caused in the weld joint.;SOLUTION: The steel plate weld joint is formed by butt-welding steel plates having the brittle crack propagation stop characteristic Kca of ≥4,000 N/mm^1.5 of at least a part of a base metal to each other. A control part 3 in the brittle crack propagation direction provided with an inclined bead 31 extending from the top of a weld line L of the steel plate weld joint 1 and inclined at the angle between ≥10° and ≤60° with respect to the longitudinal direction of the steel plate weld joint 1 is provided to at least a part of the steel plate weld joint 1.;COPYRIGHT: (C)2010,JPO&INPIT