深海潜水船耐圧球殻の実物大規模による熱処理法に関する実験的研究

概要

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In order to make oceanographic research activity more extensive, deep submergence research vehicle diving to the depth of 6000m is being required in these days. A pressure hull of the vehicle requires the material of high strength/weight ratio and good ability of manufacturing. In this point, 10 Ni-8 Co steel with the yield strength of 120 kgf/mm^2 can be said the most promising candidate for the pressure hull at pressent. To give 10 Ni-8 Co steel enough strength and toughness, heat treatment (double-quenching and tempering) is indispensable. From this respect, the authors conducted experimentally heat-treatment of 10 Ni-8 Co spherical shell using a full scale model. The report presents the description on the heat-treatment procedure, including the experimental results, which are necessary to establish the whole manufacturing procedure of a pressure hull being combined with the welding procedure already established.
社団法人日本船舶海洋工学会の論文