Research progress in the application of the new titanium alloy underwater vehicle

For a long time, the materials used in the pressure-resistant shell sonar guide cover and pipeline system of China's naval service ships are basically carbon steel, aluminum alloy and stainless steel. It is worth noting that Russia (the former Soviet Union) had also used these conventional materials, but later mostly turned to titanium alloy, and the final application effect is good.

For example, the K166 nuclear submarine, built in late 1968, was made of its shell, pipeline systems, and a large number of other devices and machinery made of titanium alloys. And in the early 1970s has attracted wide attention of the world A class attack nuclear submarine, is the international nuclear submarine minimum tonnage (underwater displacement 31 20 t), the fastest (underwater maximum speed 41kn), diving the deepest (diving depth 700m, limit diving depth of 750m) of the most advanced nuclear submarine, is also using titanium alloy as the main material to build.

Russia and Ukraine have skilled labor force and sophisticated test equipment, and have produced several types of underwater vehicles, such as MIR2, URAN-1, MASK-2, etc. Among which, advanced shell material technology such as titanium alloy derived from spacecraft is their strength.

In addition to Russia and Ukraine, other countries have also conducted research in the application field of titanium alloy. The United States began the research and application of titanium alloy submersible in the 1960s, and the sea Cliff deep submersible, built in 1981 and 1982, was equipped with titanium alloy-made observation tanks and control tanks. The main structural components of the Nautilus submersible developed in 1985, Japan's Deep Sea 6500 survey submersible, China's manned Jiaolong and the Orange Shark autonomous underwater vehicle are all made of titanium alloy.

Titanium alloy has also made new breakthroughs in the field of large scale and submersible in China. Due to good mechanical properties, long service life, less maintenance cost, titanium alloy in the application of submersible has obvious advantages, especially the large submersible equipment shell materials, not only need to have high strength and good toughness, and need to have good corrosion, sound, no magnetic and other comprehensive characteristics, so high performance research and application of titanium alloy material is the main development trend, and has a certain technical breakthrough.

Dalian university of technology wang lei put forward a application of underwater robot cylinder synchronous type permanent magnet propeller isolation sleeve is using titanium alloy material, Zhejiang university Hu Ren through the analysis of different material pressure resistance to determine titanium alloy as an underwater glider pressure shell material, the Chinese Academy of Sciences pilot special support of 7000m deep sea glider sealing head end cover is also using titanium alloy material.

Titanium alloy in the field of manned deep submersible, developed by our country "deep warrior" manned submersible working depth of 4500m, "Jiaolong" manned submersible diving depth successfully breakthrough 7000m, "striver" manned submersible in mariana trench successfully won the "fourth pole", sitting depth of 10909m. The pressure-resistant shell of these submersible types uses a high-strength titanium alloy material, and other major structures are also made of titanium alloy material. It can be said that titanium alloy has played a huge role in the field of new underwater vehicles in China, and it will also play a positive role in the research and development of high-performance vehicles.