2 1/4 Cr-1Mo 鋼の溶接(第 2 報) : クリープ破断強度に及ぼす後熱条件の影響

概要

論文の詳細を見る
Welding conditions of 2 1/4 Cr-1Mo steel have been repored in previous report. This steel has been used at high temperature and high pressure as parts of steam boiler. The study herein introduced was carried out to clarify the effect of post heat treatments on the creep rupture strength of 2 1/4 Cr-1Mo steel welded joints. Test pieces were prepared from welded joint and base metal which were treated with various post heat conditions. Creep rupture test was carried out at 600℃ and 550℃ by the multiple type rupture tester with six stations. The results were summarised as follows : (1) Specimens of welded joint, post heated at 680℃, 720℃ and 760℃, fractured at base metal in creep rupture and tensile tests, however specimens, post-heated at 920℃, fractured at welded metal. (2) Specimen, post-heated at 720℃ for 1hour, showed the best creep rupture properties among the welded joints. (3) Creep rupture strength of base metal decreased by post-heat treatments, but the decreasing at 720℃ is less than it at 760℃.
社団法人溶接学会の論文
1960-08-25