TMCP型降伏点40kgf/mm^2級高張力鋼板の船体構造への適用 : 使用区分と溶接継手部に必要な靱性値

概要

論文の詳細を見る
The 40kgf/mm^2 class yield point TMCP(thermo-mechanical control process) high-tensile steel plate comes to use for ship's principal structural members recently. For prevention of brittle fracture initiation of both base metal and welded joints, the study to estimate the level of fracture toughness of them is carried out by "K concept". Now, we get followings as results of the study ; (1) In the case of Grade AH40, using HT factor of 0.68, it is recommended that the requirements of application of high-tensile steel plates by IACS (IACS application) be severer by 5mm. The other side, using HT factor of 0.70, present IACS application may be left as it is. (2) In the case of Grades DH40 and EH40, present IACS application can be applicable when HT factor is both O.70 and O.68. (3) The welded joint in respective grades can be considered acceptable provided the fol-lowing requirements are met.[numerical formula]
社団法人日本船舶海洋工学会の論文