| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the structure of the welded joint of steel having higher strength than the strength of the joint which is determined from the material strength of a weld zone, wherein the applicable to job-site execution is possible and there is no need for special welding technique and technical skill, by providing a soft joint which is low in cost and is mitigated in conditions of post heating control, welding heat input and inter-pass temperature, mainly about a welded joint part of ultra-high-strength steel. <P>SOLUTION: The structure 1 of the welded joint includes: first steel 2; second steel 3; the joint weld zone 4; and a first reinforcing member 5 and second reinforcing member 6, for reinforcing the joint weld zone 4. The material strength of weld metal 7 in the joint weld zone 4 is smaller than any material strength of the first steel 2 and the second steel 3, the first reinforcing member 5 is brought into contact with and joined with the surface 4a on one side of the joint weld zone 4 through the weld metal 7, and also the second reinforcing member 6 is joined with the surface 4b of the other side of the joint weld zone 4. The material strength of the first reinforcing member 5, the second reinforcing member 6 and the material strength of the weld metal 7 are smaller than any material strength of the first steel 2 and the second steel 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
