China "strivers" manned submersible succeed in the marianas trench bottom, bottom depth of 10909 meters, the deepest challenge the world's oceans, the current world record, successful manned deep-sea dive to the mariana trench in the only two: one is developed by Swedish picard, father and son "trieste" 2 vehicle, the vehicle in January 20, 1960 created into mariana trench 10916 meters record, another is "strivers" manned submersibles.
Among the three limit explorations, namely, the exploration of the sky, the exploration of the earth and the exploration of the deep sea, the exploration of the deep sea is no less difficult than the other two. The corrosion of seawater, the disturbance of ocean currents, the disturbance of Marine life and the influence of the geomagnetic field all bring great challenges to the exploration of the deep sea.
In addition, 10,000 meters down in the Mariana Trench, the Striver has a water pressure of more than 110 megapascals, the equivalent of 2,000 African elephants tramping on a person's back.
And this needs to be able to withstand high pressure shell, pressure shell material selection is closely related to the advancement and reliability of submersible.
Optional materials are high-strength steel, titanium alloy, high-strength aluminum alloy, composite materials, ceramic materials, transparent glass, etc.
High strength steel has high specific strength and moderate price, but its density makes the overall weight heavy, which affects the weight and buoyancy control of deep manned submersible with large depth.
Titanium alloy is relatively light (only 60% of the weight of steel), high strength (up to more than 1000MPa), low magnetism, chemical corrosion resistance, easy to produce solid pure oxide film on the surface, and has good mechanical properties.
"Struggle" submersible extremely thick, made of titanium alloy, through advanced welding technology as a whole, strong pressure resistance.
It was developed and forged by China itself.
In addition, the manned capsule is the most core component of manned submersible, and its manufacturing quality is the basic guarantee for the life and safety of submersible personnel. It should also be made of titanium alloy. With the increase of diving depth and the size of the capsule, the development difficulty increases exponentially.
This is a high performance of titanium alloy design, large thickness plate preparation, hemisphere as a whole, such as big thickness of titanium alloy electron beam welding technology of interdisciplinary systemic engineering, manned space requirement light weight, high strength, weldability and corrosion resistance, fatigue resistance, long life, but also in the floating process of the dive and keep elastic deformation, to provide a safe space pilot, can say the material preparation ability and the comprehensive mechanical properties of the large size of demanding.
