China has successfully broken through the special welding process of high strength and high toughness titanium alloy materials

Deep sea in China manned submersible uses titanium alloy, and the diving depth is far more than 1000 meters. "Striver" all sea deep manned submersible has completed all 10000 meter sea test missions in the Mariana Trench of the Western Pacific Ocean, and created a new record of 10909 meters for China's manned deep diving.

Under more than 10000 meters of sea water, the water pressure exceeds 110 MPa, which is equivalent to 2000 African elephants on your back. Such a high pressure depends on the manned cabin. In order to ensure the passenger capacity, the manned cabin should be large. In order to reduce the burden of the submersible, the ball cabin cannot be heavy. In order to withstand 10000 meters of sea pressure, the manned cabin must be strong. Moreover, due to long-term immersion in water, conventional materials are easy to rust and corrode, and may be abandoned in a short time.

Therefore, a new domestic titanium alloy material has appeared, which can not only withstand the strong pressure of the seabed, but also has excellent corrosion resistance.

The researchers of the Seventh Five Year Plan Institute of China Shipbuilding Corporation solved this problem, successfully broke through the special welding process of high strength and high toughness titanium alloy materials, and successfully completed the equatorial seam welding of manned cabin at one time by applying this technology for the first time in the world, providing a strong guarantee for the "striver".