The welding structure which is superior in resistance brittle crack propagation characteristic

摘要

At least inclining with angle of the range below the 50 above the 15 the periphery of the insertion component where it faces the steel sheet where brittle crack propagation stop quality Kca of the territory of part is above 4000N/mm, mutually and the steel sheet welded joint being formed by the fact that it welds, provides the resistance crack control section which bends the brittle crack where the steel sheet welded joint in one place, occurs at least in the steel sheet welded joint in the welding structure which becomes, on steel sheet basic material side forms the resistance crack control section, from the weld metal section of the steel sheet welded joint, vis-a-vis the longitudinal direction of the steel sheet welded joint, in longitudinal direction of the aforementioned steel sheet welded jointIn order extending to be present, as it forms, when the breadth direction end of the aforementioned insertion component, brittle crack occurs in the welded joint to face in the territory where Kca of the aforementioned steel sheet is above 4000N/mm, brittle crack tries the welded joint and the basic material to be able to control the fact that it is spread.