[Expand the application of aluminum] Aluminum material to help China to advance into the aerospace power

    A month after the successful launch of a Long March 3B carrier rocket carrying the Beidou-3, a Long March 5 rocket blasted off at 12:41 am on July 23, lifting China's domestically developed Mars Probe Tianwen-1.They are composing the grand prelude of the symphony of China's space power in space and write the epic grand preface of China's space power.China has not only become a global space power, but also in great strides towards a comprehensive space power. 

    It is important to note that no matter what kind of spacecraft, the structure of the material and rocket structural materials are mainly high temperature aluminum/titanium/steel, composite materials, aluminum used most frequently, however, accounts for about 80% of the total amount of material above, for example, the normal temperature propellant tank is made of 5 a06, 2 a14 aluminium alloy welding, the final network satellite beidou no. 3 of the liquid hydrogen and liquid oxygen tank is made of 2219 aluminum alloy plate welding, provided by chinalco, the rocket liquid kerosene fuel tank is also made of 2219 aluminum alloy welding.Aluminum alloy has excellent low temperature mechanical properties, its strength and plasticity increase synchronically with the decrease of temperature, which means that aluminum alloy has no low temperature brittleness, but most structural steel has low temperature brittleness.

    2219 alloy is a kind of aluminum - copper - manganese - titanium - vanadium - zirconium series alloy, is an American alloy, the production process is mature and stable, China can be mass production.China now USES third-generation aluminum alloy 2195 and 2197 (both of which contain lithium), and fourth-generation 7055 and 7085 alloys in the cabin structure of launch vehicles.

    In recent years, China's aluminum industry has provided a large number of key materials for key national aerospace projects such as Shenzhou spacecraft, Chang 'e satellite, Long March carrier rocket, Tiangong target aircraft and C919 aircraft.While China has made new achievements in the field of aerospace, it has also promoted the continuous innovation and development of China's high-end aluminum industry, making more aluminum flying into the blue sky and boosting China's advance into a comprehensive aerospace power.