12. Research on Heat Treatment Procedure for Deep Submergence Research Vehicle's Pressure Hull Using Full Scale Model

概要

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In order to make oceanographic research activity more extensive, deep submergence research vehicle diving to the depth of 6000 m 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 present. 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 including the experimental results, which is 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