Chalco Aluminum is a well-known enterprise specializing in providing high-quality aluminum for military enterprises. We provide high-quality aluminum for bulletproof equipment, military vehicles, weapons, bullets, military bases, warships, military aircraft and other military products.
Use of aluminum in bulletproof equipment
The police, special forces and anti riot forces will be attacked by bullets, sticks, sharp knives and stones when performing their tasks. In order to ensure their own safety, bulletproof vests, helmets and shields are often used as protective equipment. Aluminum alloy is an important part of the raw materials for these equipment.
Why aluminum alloy is used as bulletproof material
- Aluminum alloy has small density and light weight, which can reduce the load of user
- Aluminum alloy has been processed
- Aluminum alloy has high melting point and can resist flame and high temperature
- Aluminum alloy has high strength and can withstand the impact of high-speed bullets to a certain extent
- 2000 series: 2021, 2019, 2519 etc.
- 5000 series: 5A12 etc.
- 7000 series: 7020 etc.
The bulletproof helmet is composed of a helmet shell (including a hem) and a suspension buffer system (including a helmet hoop, a buffer layer, a chin strap, and a connector). The helmet shell is made of aramid dipping woven fabric. Comfortable and stable to wear.
For the Derun type folding well helmet with round video screen, its helmet shell is made of high-strength aluminum alloy. The mask is made of impact resistant polycarbonate with good transparency and its weight is 22g. It can effectively prevent 54 type pistol and 51 type ordinary bullet from injuring human head.
In terms of materials, bulletproof vests can be divided into software and hardware (Soft and Hardarmor). The bulletproof coat is mainly composed of a jacket and a bulletproof layer. Clothing covers are usually made of chemical fiber fabrics, while bulletproof layers are mostly made of metal.
Aluminum alloy is a common material for hard bulletproof layer. Here are the bullet proof standards of various countries.
The aluminum alloy bulletproof insert plate helps to reduce the weight and thickness of the personal bulletproof vest by more than 50%. The reduction of weight and thickness not only improves the agility and moving speed of soldiers, but also greatly reduces the pressure of individual soldiers and improves their endurance.
Traditional steel plates weigh three times as much as aluminum. Adding boron nitride nanotube aluminum reinforced particles into aluminum alloy can make aluminum plate as strong as steel plate, but its weight is lighter. The weight of the bulletproof insert plate can be reduced from 3 kg to 1 kg, effectively reducing the weight of individual equipment.
Some riot shields are made of aluminum alloy or other metals. Although these will reduce visibility, they provide a tactical advantage. It is popular in the case of possible flammable threats such as incendiary bombs. They also perform well in dealing with projectiles. The disadvantage is that it will affect the user's vision and cause mobility inconvenience.
Use of aluminum in weapons and ammunition
Aluminum alloy can also be used in some weapons, such as armored vehicles, ammunition and a small number of guns.
Application of aluminum in armored vehicles
A large amount of aluminum alloy is used in the body, armor and mobile systems of armored vehicles.
Advantages of aluminum alloy for making armored vehicle plates
- Aluminum alloy is easy to forge, roll, punch and cut
- Good welding performance
- Good plasticity and impact resistance, which can ensure the ballistic resistance of armor structure.
- After aging, it can be recovered to more than 70% of the original tensile strength.
- Aluminum alloy armor has greater bending stiffness, which can eliminate reinforcing ribs and reduce the manufacturing cost of armored vehicles
- Reduce production expense and cost
- Reducing the number of structural parts of armored vehicles can save equipment and power and save energy consumption
Therefore, aluminum alloy protective materials are the best choice for armored vehicle protective plates.
Common aluminum alloy series for aluminum armor plate
- Weldable 7020, 7017 and 7018 aluminum alloys
- 2139-T8 and 2195-T8P4 with more excellent mechanical and ballistic properties
- 5083 H131 aluminum sheet with corrosion resistance and strong welding performance
Aluminum alloy is not suitable to be used as shell case due to its high temperature resistance, but it is favored in electromagnetic gun and aluminum thermite bomb because of its non-magnetic and thermal expansion.
High energy electromagnetic gun
The electromagnetic rail gun is not only light in weight, but also occupies less space than the traditional gun. For electromagnetic gun, neither traditional fire protection nor ammunition filling is required. This will undoubtedly change the navy's traditional thinking about naval artillery warfare.
The aluminum bomb flew out of the electromagnetic orbit at Mach 7 and flew in the atmosphere for 1 min. Then fly out of the atmosphere for 4 minutes. Finally, it falls back to the earth at a speed of about Mach 5 within 1 min to hit the target.
The thermite bomb belongs to the hot pressing weapon. Its official name is air explosion heat pressure enhanced bomb. The explosive inside is a mixture of fine ethylene oxide powder and aluminum powder, which will explode in the air after being dropped. The mixture thrown into the air can form a huge explosive cloud. When it is been Immediately detonated, in addition to the high temperature released by the explosion, it will also produce a fatal pressure wave. It can significantly destroy tanks, caves, bunkers and other closed fortifications.
It will be a huge bomb when the yield exceeds 10t TNT.
In the manufacturing of conventional weapons, 2024, 7075 and other high-strength aluminum alloys are used to make gun barrel, barrel sleeve and other structural parts.
Use of aluminum in military vehicles
Militia missile carrier
- 2024-T6 alloy forged disc wheel;
- 2014-T6 forged front wheel hub, fifth wheel control arm and cross beam, and balance beam in tandem shaft assembly;
- 6061-T6 plate and bar weldment for trailer frame cross assembly rear hinge structure and multiple suspension system brackets;
- 220-T4 alloy sand casting auxiliary transmission and oil tank bracket;
- Welding 5052 plate steam oil tank; 1100 alloy brazed tube fin radiator;
The welded components in the vehicle are heat treated after welding. If the strength requirement allows, the operation is limited to the artificial aging materials welded in T4 state. However, in many cases, blanks in the O or F state are welded and components are fully heat treated.
Most of the military tracked vehicles used except for combat or logistics are bulldozers. The typical ones are commercial bulldozers and the aluminum is generally limited to be used in power plant.
Amphibious vehicle and navy LVH
Army LARC (light, amphibious, supply, cargo) and landing vehicles, hydrofoil craft.
High speed and efficient performance is achieved through complex structural and hydrodynamic design and extensive use of aluminum.
5083 H112 and H113 alloy plates in tempering conditions form stress skin hull and superstructure by welding. The foil is the welded assembly for 5083 extruded and hollow tubes.
Common castings, forgings, and weldments in forged 2024-T6 wheels, cast 356-T6 power train housings, and turboshaft engines are other aluminum applications.
Use of aluminum in military aircraft
High strength aluminum alloy is an important part of helicopter airframe materials.
China's newly developed Zhi-19E is a light armed helicopter. In the structural materials of Zhi-19E, although some composite materials are used, aluminum alloy is still dominant, accounting for more than 60%.
Because the strength of the mechanical properties of aluminum alloys decreases significantly when the temperature is 150 ℃, the proportion of aluminum alloys used in fighter aircraft is much lower than before, but still accounts for a certain proportion.
As an example, the aluminum alloy of early F~104 fighter aircraft is as high as 70.7% The proportion of aluminum alloy in F22 fighter aircraft in the United States is 15%.
Aluminum used in military facilities
Military facilities are buildings, sites and facilities used for military purposes.
Including command organs, ground and underground command projects and combat projects; Military airports, ports and docks; Camp, training ground and testing ground; Military caverns and warehouses; Military communication, reconnaissance, navigation and observation stations and surveying, navigation and navigation aids signs; Military highways and railways, power transmission lines, military oil and water pipelines
Military facilities need a large amount of aluminum alloy. For example, the extruded porous hollow wall plate is used as the runway plate of the temporary airport; the Al Mg and Al Zn Mg alloy plates and profiles are used to build the floating bridge; and the high-strength aluminum alloy is used to make the stressed parts of the missile launcher.
Use of aluminum in warships
Aluminum alloy plates, profiles, wallboards and other materials are also widely used in military ships. Marine alloys mainly use high magnesium aluminum alloys with good corrosion resistance and weldability, while the alloys used as structural members mainly include Al-Zn-Mg and Al-Mg-Si alloys.