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本文摘译自1984年№4《金属技研》。日本冶金科学工作者认为,占地球面积约70%的海洋,储有丰富的矿物、能量及食物资源。对四面环海的日本来说,开发海洋资源和有效利用海洋空间是当前深入研究的重要课题之一。开发海洋需具有海上系泊设备、海底挖掘设备、深水调查船及海底管道等各种大型结构。建造这些结构一般使用拉伸强度小于50kgf/mm~2的钢材。用这类钢材建造的结构要求经济可靠。对海洋
This article has been translated since 1984 № 4 “Metal Research”. Japanese metallurgical scientists believe that the oceans, which make up about 70% of the Earth’s surface, contain abundant minerals, energy and food resources. For Japan, surrounded by seas, the development of marine resources and the effective utilization of marine space are one of the important topics currently under intensive study. The development of the sea requires a variety of large structures including offshore mooring equipment, seabed mining equipment, deepwater survey vessels and submarine pipelines. Construction of these structures generally use steel with tensile strength less than 50kgf / mm ~ 2. Structures constructed from this type of steel require economic reliability. To the ocean