Aluminum: a general term for alloys based on aluminum. The main alloying elements are copper, silicon, magnesium, zinc, manganese, and the secondary alloying elements are nickel, iron, titanium, chromium, lithium, etc.
　　Aluminum alloy has low density, but relatively high strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel. .
　　Aluminum alloys are divided into two categories: cast aluminum alloy, which is used in the transition state: this type of aluminum alloy can withstand pressure and increase the pressure: high mechanical properties are used in the cast state. It can be processed into various shapes and specifications: Alloy materials: It is necessary to manufacture aviation equipment, daily necessities, doors and windows for construction, etc.: Aluminum alloys can be divided into
　　deformed aluminum alloys and cast aluminum alloys according to processing methods. Deformed aluminum alloys are divided into non-heat-treatable aluminum alloys and heat-treatable aluminum alloys. The non-heat-treatable type cannot improve the mechanical properties through heat treatment, but can only be strengthened through cold deformation. It mainly includes high-purity aluminum, industrial high-purity aluminum, industrial pure aluminum, and anti-rust aluminum. Heat treatable strengthened aluminum alloys can improve mechanical properties by means of heat treatment such as quenching and aging. It can be divided into hard phase, forging, super phase and special aluminum alloy.
　　Aluminum alloys can be heat treated to obtain good mechanical properties, physical properties and corrosion resistance. Cast aluminum alloys can be divided into aluminum-silicon alloys, aluminum-copper alloys, aluminum-magnesium alloys and aluminum-zinc alloys according to their chemical composition.
　　[Pure products]
　　Pure aluminum is divided into two categories: refined products and pressure processed products. The former is represented by the chemical composition A1, and the latter is represented by the Chinese pinyin LG (aluminum, industrial use).
　　[Pressure processing phase alloy]
　　Aluminum alloy pressure processing products are divided into antirust (F), hard (LY), fake (LD), super (LC), cladding (LB), special (LT) and nail welding ( 1Q) and other seven categories. The states of commonly used aluminum alloy materials are annealing (M annealing), chemical (Y), and hot rolling (R).
　　[Aluminum materials]
　　Aluminum and aluminum alloys processed into certain shapes are collectively referred to as aluminum materials, including plates, strips, foils, pipes, bars, wires, profiles, etc.
　　【Cast Aluminum Alloy】
　　Cast aluminum alloys (ZL) are divided into four categories according to the main elements other than aluminum in the composition, silicon, copper, magnesium, and zinc, and the codes are 100, 200, 300, and 400, respectively.
　　[High-strength aluminum alloys]
　　High-strength aluminum alloys refer to aluminum alloys whose tensile strength is greater than 480 MPa, mainly including hard aluminum alloys, superhard aluminum alloys and casting alloys in press-processed aluminum alloys.
　　[Aluminum alloy defect repair]
　　During the production process of aluminum alloy, casting defects such as shrinkage cavities, blisters, pores and slag inclusions are prone to occur. How to repair defects such as air holes in aluminum alloy castings? If electric welding, chlorine welding and other equipment are used to repair, due to the large heat release, side effects such as thermal deformation are likely to occur, which cannot meet the repair welding requirements. The cold welding repair machine uses the principle of instantaneous discharge of high-quality electric sparks and no heat surfacing to repair casting defects. Due to the small heat-affected area of ​​cold welding, it will not cause annealing deformation of the base material, no cracks, no hard spots, and no hardening phenomenon. Moreover, the welding strength is high, and the supplementary material and the matrix are melted and then solidified at the same time, and the combination is firm, which can be processed by grinding, milling, filing, etc., and it is dense and does not fall off. The cold welding repair machine is an ideal method for repairing small defects such as air holes and sand holes in aluminum alloy.
　　[Typical uses of different grades of aluminum alloys]
　　Typical uses of alloys
　　1050 Extrusion coils for food, chemical and brewing industries, various hoses, fireworks powder
　　1060 Occasions that require high corrosion resistance and formability, but not strong requirements High, chemical equipment is its typical use
　　1100 for processing parts that require good formability and high corrosion resistance but do not require high strength,
　　such as chemical products, food industry devices and storage containers, thin plate processing parts, deep Pulling or spinning concave vessels, welded bag parts, heat exchangers, printing plates, nameplates, reflective appliances 1145
　　packaging and heat insulating aluminum foil, heat exchangers
　　1199 electrolytic capacitor foil, optical reflective deposition film
　　1350 electric wires, conductive lines, bus bars , Transformer strip
　　2011 screws and mechanically added products that require good cutting performance
　　2014 Applied to occasions requiring high strength and high temperature (including high temperature): heavy aircraft, forgings, thick plates and extruded materials, wheels and structural components, multi-stage rocket first-stage fuel plants and spacecraft parts, truck frames and suspensions System parts
　　2017 are the first 2XXX series alloys to be applied in industry. The current application range is narrow, mainly rivets, general mechanical parts, structural and transportation structural parts, propellers and accessories 2024 aircraft structures, rivets, and missile
　　components , Truck hubs, propeller components and other structural parts
　　2036 Automotive body metal parts
　　2048 Aerospace vehicle structural parts and weapon structural parts