WELDING AND WELDING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a welding structure being capable of relieving stress concentration and having a lap joint with an excellent fatigue strength and welding method for the welding structure. SOLUTION: In a welding structure 1 which is made by a lap welding of a first member 11 and a second member 12, at a tip part of the first member 11 of a lapping part 10, a tip weld zone 15 is formed by the melting and solidifying of the first member 11 and the second member 12 while an outer surface 117 of the first member 11 is irradiated with a welding heat source. An angle between a tip surface 151 of the tip weld zone 15 and a surface of the second member 12 is set at 90 deg. or larger.