The original aluminum is called electrolytic aluminum in the market supply, which is the raw material for the production of aluminum and aluminum alloy. Aluminum is a metal with low strength and good plasticity. In addition to the application of some pure aluminum, in order to improve the strength or comprehensive properties, the alloy is made. When an alloy element is added to aluminum, its structure and properties can be changed, and it is suitable for various processing materials or casting parts. Copper, magnesium, zinc and silicon are often added
Classification of aluminium and aluminium alloys
Wrought aluminum alloy
Aluminum alloy with high strength, high specific strength and suitable for plastic forming.
The deformed aluminum alloy is divided into:
(1) . industrial pure aluminum
(2) . aluminum alloy that can not be strengthened by heat treatment
(3) . aluminum alloy that can be strengthened by heat treatment
Cast aluminum alloy
It is suitable for filling the mold in the molten state to obtain the aluminum alloy with a certain shape and size of casting blank.
Cast aluminum alloy is divided into:
(1) Aluminum silicon alloy
(2) . aluminum copper alloy
(3) , aluminum magnesium alloy
(4) Aluminum zinc alloy
(1) . brand name of pure aluminum: when the aluminum content is not less than 99.00%, it is pure aluminum, and its brand is represented by 1xxx series. The last two digits of the brand indicate the minimum aluminum content. When the minimum aluminum content is accurate to 0.01%, the last two digits of the brand number are the two digits after the decimal point of the minimum aluminum content. The second letter of the brand indicates the modification of the original pure aluminum. If the second letter is a, it means the original pure aluminum; if the second letter is B ~ y (selected according to the alphabet order in international regulations), it means the modification of the original pure aluminum. Compared with the original pure aluminum, its element content slightly changes.
(2) . brand name of aluminum alloy: the brand of aluminum alloy is represented by 2XXX ~ 8xxx series. The last two digits of the brand name have no special meaning, they are only used to distinguish different aluminum alloys in the same group. The second letter of the trademark indicates the modification of the original alloy. If the letter in the second place of the brand number is a, it means the original alloy; if it is other letters of B ~ y (selected in the order of alphabet according to international regulations), it means the modified alloy of the original alloy.
Use of aluminium and aluminium alloys
More common brands: 1060, 2024, 5052, 6061, 6063, 7075.
1060:1060 is a kind of common industrial pure aluminum with aluminum content no less than 99.60%. It is characterized by low strength and work hardening as the only way of strengthening. It has good hot and cold working performance, high thermal conductivity and corrosion resistance. It is widely used in industrial equipment which requires good formability, corrosion resistance and weldability, and also as electrical conductor material.
The composition and structure of 2024:2024 alloy are the same as 2A12 alloy, only the content limit of impurity Fe and Si in 2124 alloy is low. 2024 alloy sheet, thick plate and profile have been successfully used in the manufacture of aircraft and rocket skin, cabin section, integral fuel tank wall plate, wing beam, etc.
The magnesium content of 5052:5052 alloy is 2.5%, which is lower in aluminum magnesium antirust aluminum. It is widely used in the manufacture of fuel and fuel pipes and fuel tanks of aircraft, spare parts of various ships and means of transport, sheet metal products, instruments, street lamp supports, rivets and wires, etc.
6061: 6061 alloy is a heat-treatable and strengthened aluminum alloy of Al Mg SI system, which can be processed into plates, tubes, bars, shapes, wires and forgings. It is widely used in building profiles, requiring large-scale structural parts with good corrosion resistance, truck, ship, railway vehicle structural parts, conduit, home, etc.
6063: 6063 alloy is Al Mg Si heat treatable strengthening aluminum alloy, which can be extruded into bar, profile and tube. It is widely used in building structural materials and decorative materials, such as door frames, window frames, wall panels, containers, furniture, elevators, as well as aircraft, ships, light industry departments, buildings and other decorative components of different colors.
7075:7075 alloy is Al Zn mg Cu system super hard aluminum, which is characterized by good plasticity after solution treatment and obvious heat treatment strengthening. It can be processed into plates (including aluminum and not including aluminum), pipes, profiles, bars and forgings. Mainly used for aircraft structural parts and other high-strength anti-corrosion structural parts