by The Chinese manned submersible under construction plans to challenge the depth of 10000 meters under the sea by 2020.
Recently, the core component of the 10-thousand-meter submersible – the manned ball cabin has been successfully punched, laying the foundation for the construction of the submersible.
The successful stamping of the core component manned ball cabin is to press and deform a huge titanium alloy plate with a vertical cylinder to make it become a “bowl”.
The two “bowls” are buckled together to become the ball cabin of the manned submersible.
It is the activity area for divers to ride and drive the submersible, and also one of the internal main components and core technologies of the entire submersible.
In this huge workshop, the heated plate was quickly moved to the bottom of the column, and once hammered down, the plate was pressed into the shape of a bowl, showing red light and hot gas.
At this moment, the temperature reached above 600 degrees, and there was a risk of cracking at any time.
The scientists were holding a handful of sweat.
After careful inspection, the bowl is reheated and waiting for the second stamping.
More than 10 hours later, the second stamping began.
The “big bowl” was extruded and shaped by a heavy hammer into a perfect semicircle.
The shape, roundness and wall thickness all met the requirements of the submersible construction.
The manned ball cabin was successfully stamped.
After the hemispherical stamping is successful, another hemisphere with the same diameter will be manufactured, and the two semicircles will be aligned to form a complete spherical tank.
Subsequent processing, welding, heat treatment and other work will be carried out.
The ball cabin has a very high technology content for deep sea diving.
The underwater pressure increases with the depth.
After reaching 10000 meters of the seabed, the pressure borne by the submersible is equivalent to the weight of a car, which is pressed on the fingernail of the little finger.
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 cannot tolerate any carelessness or omission.
From design to manufacture, the manned ball cabin is all self-developed and innovative, which has experienced many unimaginable difficulties and challenges.
Jia Shuanxiao, General Manager of Baoji Titanium Industry Co., Ltd.: When 11000 meters is reached, it is actually a new research.
At present, no country in the world can reach the level of 11000 meters.
Therefore, we have no data to refer to, which is equivalent to being the first to eat crabs, so the challenge is very difficult.
From the selection and construction of titanium alloy, the manned spherical capsule has gathered the efforts of scientists for decades.
It takes a lot of effort to overcome the problem of material cracking.
Lei Jiafeng, deputy director of the Titanium Alloy Research Department of the Institute of Metals of the Chinese Academy of Sciences, said that this material should have enough strength to withstand the underwater pressure of 10000 meters of the seabed, and also have enough toughness to ensure long-term safe use.
In the process of stamping a large spherical shell with high-strength and high-hardness materials, there are great risks, such as surface cracking, which has always been our most concern.
It is understood that the service life of the 10-thousand-meter manned submersible will reach 30 years, and it will be used to carry out underwater exploration, seabed exploration, seabed development and other tasks.
According to the plan, China will complete the development of the 10-thousand-meter manned submersible by 2020.
In the future, scientists will carry out scientific research as it dives into the 10-thousand-meter seabed to explore the unknown world of the deep ocean.
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