by The Chinese manned submersible under construction plans to challenge the depth of 10000 meters under the sea in 2020.
Recently, the manned ball cabin, the core component of the 10000 meter submersible, was successfully stamped, which laid the foundation for the construction of the submersible.
The so-called stamping is to press and deform a huge titanium alloy plate with a vertical cylinder to turn it into a “bowl”.
The two “bowls” are buckled together to become the ball cabin of manned submersible.
It is not only the activity area for divers to ride and drive the submersible, but also one of the internal main components and core technologies of the whole submersible.
In this huge workshop, the heated plate is quickly moved under the column and hammered down.
The plate is pressed into a bowl shape with red light and hot gas.
At the moment, the temperature reaches more than 600 degrees and there is a danger of bursting at any time.
Scientists are sweating.
After careful inspection, the bowl is heated again and waiting for the second stamping.
More than 10 hours later, the second stamping began.
The “big bowl” was extruded and shaped by the heavy hammer into a perfect semicircle.
The shape, roundness and wall thickness met the requirements of submersible construction, and the manned ball cabin was successfully stamped.
After the hemispherical stamping is successful, a hemispherical with the same diameter will be manufactured, and the two semicircles will be aligned to form a complete spherical cabin.
In the follow-up, there will be processing, welding, heat treatment and other work.
The scientific and technological content of the ball cabin is very high.
The underwater pressure increases with the depth.
After reaching the seabed of 10000 meters, the pressure borne by the submersible is equivalent to pressing the weight of a car on the fingernail of the little thumb.
The manned cabin is the heart of the submersible.
To ensure the safety of the three divers in the ball cabin, there are strict requirements for the thickness, size, performance and even roundness of the ball cabin, which can not tolerate any carelessness and omission.
The design and manufacture of the manned capsule are all independent research and innovation, which has experienced many unimaginable difficulties and challenges.
Jia shuanxiao, general manager of Baoji Titanium Industry Co., Ltd.: at 11000 meters, it is actually a new research.
At present, no country in the world can achieve the level of 11000 meters.
Therefore, we don’t have any data to refer to, which is equivalent to eating crabs first, so the challenge is very difficult.
From the material selection to construction of titanium alloy, the manned capsule has gathered the efforts of scientists for decades, and it is useless to solve the problem of material cracking.
Lei Jiafeng, deputy director of Titanium Alloy Research Department of Institute of metals, Chinese Academy of Sciences: this material is required to have high enough strength to withstand the underwater pressure of 10000 meters of seabed, and also have enough toughness to ensure long-term safe use.
For high-strength and hard materials, there are great risks in stamping a large spherical shell, such as surface cracking, which has always been our most worried problem.
It is understood that the service life of the 10000 meter manned submersible will reach 30 years and will be used for underwater investigation, seabed exploration, seabed development and other tasks.
According to the plan, China will complete the development of the 10000 meter manned submersible in 2020.
In the future, scientists will conduct scientific research with it to explore the unknown world of the deep ocean.
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