ホットコイル材の船体上部構造への適用に関する諸検討

• Published in: 日本船舶海洋工学会論文集 Vol. 32; pp. 247 - 257
• Main Authors: 成松, 久雄, 上村, 崇杜, 桑田, 正和, 後藤, 浩二
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本船舶海洋工学会 2021
• ISSN: 1880-3717; 1881-1760
• DOI: 10.2534/jjasnaoe.32.247

Application of the hot-rolled steel sheet for the members of superstructure, where the strength requirement of these parts in ships is not severe, is expected as a solution to reduce the hull construction cost. Because the hot-rolled steel sheet is applied after recoiling by cold working to return it to a flat plate, the material properties is deteriorated due to excessive plastic working and the residual stress induced by the plastic work might affect for the thermal cutting and welding. There is a possibility that the hot-rolled steel sheet has poor properties comparing with the flat rolled steels applied for hull parts where the structural integrities are required by the classification societies’ rules. The difference of properties between the hot-rolled steel sheet and the flat rolled steel are investigated in this research.