Aluminum alloy has great value in automobile lightweight1

With the development of China's transportation industry to the direction of modernization and high speed, the lightweight requirements of transportation vehicles are increasingly strong, and there is a growing call to replace steel with aluminum. Especially demands a high degree of lightweight aircraft, spacecraft, railway vehicle, underground railway, high-speed trains, freight cars, cars, boats, ships, artillery, tanks and mechanical equipment, and other important mechanical parts and structure, in recent years a large number of the use of aluminium and aluminium alloy forgings and forging parts to replace the old steel structure, such as aircraft structures almost all adopt the aluminum alloy die forgings; Automobile (especially heavy vehicles and large and medium-sized buses) wheel hub, bumper, base girder; The roadwheel of a tank; Battery frame; Moving ring and stationary ring of helicopter; Train cylinders and piston skirts; Woodworking machine fuselage; Aluminum alloy die forgings have been used to manufacture the frame, track and coil of textile machinery. Moreover, these trends are greatly increasing, and even some aluminum alloy castings are beginning to be replaced by aluminum alloy die forging.
Market demand and application prospect analysis
Based on the above analysis, aluminum and aluminum alloy forgings are mainly used in industrial sectors requiring large degree of lightweight. According to the current application situation of various countries, the main market distribution is as follows.
(1) Aviation (aircraft) forgings: Plane accounts for about 70% by weight of the aircraft materials for the forgings, such as landing gear, frame, rib, engine parts, the fixed ring and ring, forgings used by thousands of a plane, which in addition to a small number of high temperature components using high temperature alloy and titanium alloy forgings, the vast majority of aluminized, Boeing, such as the United States, thousands of aircraft, in takes tens of thousands of tons of aluminum alloy forgings. China's fighter aircraft and other military aircraft and civil aircraft are also developing rapidly, especially the launch of large aircraft projects and the implementation of major projects such as aircraft carriers, the need to consume aluminum forgings will increase year by year.
(2) Aerospace forgings: the forgings on the spacecraft are mainly forging ring, ring, wing beam and frame, etc., the vast majority of aluminum forgings, as long as a few titanium forgings. The development of spacecraft, rockets, missiles, satellites and so on demand for aluminum forgings are increasing day by day. For example, in recent years, Al-Li alloy shell forgings for ultra-long range missiles developed in China weigh more than 300 kilograms each and are worth hundreds of thousands of yuan. φ 1.5 ~ φ 6mm of all kinds of aluminum alloy forging ring consumption is also increasing.
(3) Weapon industry: such as tanks, armored vehicles, personnel carriers, chariots, rockets, gun racks, warships and other conventional weapons using aluminum alloy forgings as load-bearing parts increased greatly, basically replacing steel forgings. In particular, the important forgings such as aluminum alloy tank roadwheels have become the important materials of light weight and modernization of weapon equipment.

(4) Automotive is the most promising industry using aluminum alloy forgings, is also the largest user of aluminum forgings. Mainly used as wheels (especially heavy vehicles and large and medium-sized buses), bumpers, base girders and some other small aluminum forgings, among which aluminum wheel is the most used aluminum forgings, mainly used for buses, trucks and heavy vehicles. In recent years, in small and medium-sized cars, motorcycles and luxury cars also began to use. According to statistics, the annual growth rate of aluminum wheel hub in the world in recent years is more than 20%, and the current use of billions.