深海装备材料技术（Deep sea equipment materials technology）.doc

深海装备材料技术（Deep sea equipment materials technology） As far as deep-sea equipment is concerned, the most important general materials are of two kinds. One is the structural material with good pressure resistance, and the other is buoyancy material that is widely used as a buoyancy compensation for submersibles. (1) material technology of pressure hull for deep-sea equipment The special environment of the deep sea puts forward special requirements for the pressure hull material of deep-sea equipment. Deep-sea equipment materials not only have the pressure hull corrosion resistance but also have certain physical properties, fairly stable and adequate ductility in a certain temperature range, it should also yield strength and high elastic modulus is higher. Thus, the deep-sea equipment can withstand the static pressure generated by its working depth and the periodic load produced by the submerged and floating of the deep-sea equipment during the whole service period, and the influence on the pressure hull. At present, there are two kinds of materials used for pressure hull of deep-sea equipment: metal material and nonmetal material. Metal materials are mainly used in submarines and submersibles, and non-metallic materials are mainly used in submersibles. Metal material At present, there are two kinds of metal materials used for pressure hull of deep-sea equipment: steel and titanium alloy. Submarines in the United States, Japan, Britain, Russia and other countries use steel as pressure hull materials, and some of these countries use titanium alloys as pressure resistant shells. Russia has four submarines, using titanium alloy as pressure hull material, and the rest of the submarine are made of high strength steel as pressure hull material. Materials used in the Navys deep-sea equipment pressure hull The pressure hull of Navy submarine is mainly made of Hy series hardened and tempered steel. Before 1960s, the standard steel hull of the United States Navy submarine pressure