厚板溶接部の溶接割れ防止の研究(第二報)

概要

論文の詳細を見る
Following phenomena were experienced on the welding with plate thickness 100mm to 200mm. (1) The weld cracking increases with an increases of the plate thickness (number of welded layer). (2) Weld cracking occurs several days after welding. In order to assure above phenomena and study the preventive method of the weld cracking, the weld cracking test was carried out and the weld cracking phenomena were observed. The main results obtained are as follows. (1) It is clarified that weld cracking increases with an in crease of the thickness of welded plate, and the initiating position of weld cracking lies just under the surface bead. (2) Incubation period of weld cracking is 4 days after welding. (3) Weld cracking is prevented with lower temperature postheating for 0.5 hr at 300℃ in case of local gas heating for a 2 1/4 Cr-1Mo steel. (4) It is clarified that above phenomena are based on the distribution of hydrogen in thick weldment which is reported by authors in the previous report.
社団法人溶接学会の論文
1975-08-05