ã€China Aluminum Industry Network】 1. Aluminum extrusion principle Aluminum extrusion is the application of external force to the metal blank placed in the container (extruding barrel) to make it flow out from a specific die hole to obtain the desired cross-sectional shape and The size of a plastic processing method. Second, the composition of the aluminum extrusion press Aluminium extrusion press consists of a machine frame, a front pillar frame, an upright column, an extrusion cylinder, and a hydraulic system under the electric control. The other is equipped with a mold base, a thimble, a scale board, a skateboard, etc. . Third, the classification of aluminum extrusion method According to the type of aluminum extrusion cylinder metal, stress and strain state, aluminum extrusion direction, lubrication status, extrusion temperature, extrusion speed, the type or structure of the mold, blank The shape or number, product shape or number of different, can be divided into positive extrusion method, reverse extrusion method, (including plane deformation extrusion, axisymmetric deformation extrusion, general three-dimensional deformation extrusion) side Extrusion method, glass lubrication extrusion method, hydrostatic extrusion method, continuous extrusion method and so on. Fourth, the positive thermal deformation extrusion Most of the hot-deformed aluminum manufacturers use positive heat deformation extrusion method through a specific mold (flat die, cone die, split die) to obtain the desired cross-sectional shape of aluminum, This is the method of production of aluminum that Jin Haoye Aluminum has so far adopted! Forward extrusion process flow is simple, equipment requirements are not high, the metal deformation capacity is high, can produce a wide range of aluminum material performance controllability, production flexibility, easy to maintain and repair the mold. The defect is that the inner surface of the extrusion cylinder is strongly frictional with the aluminum material, which accounts for a large ratio of extrusion energy consumption. The friction easily causes the ingot heating in the barrel to increase the instability of the profile, impairs the efficiency of the finished product, and limits the aluminum and aluminum. The extrusion speed of the alloy accelerates the wear and service life of the extrusion die. Fifth, the type, performance and use of heat-deformed aluminum alloys The types of heat-deformed aluminum alloys are divided into eight categories according to performance and application requirements, and their performance and use are different. 1, pure aluminum (L) corresponds to the international grade 1000 pure aluminum, Industrial pure aluminum, excellent processability, corrosion resistance, surface treatment and electrical conductivity, but low strength, for household appliances, electrical products, pharmaceutical and food packaging, transmission and distribution materials. 2. The hard aluminum (Ly) corresponds to the international grade 2000AL-Cu (aluminum copper) alloy. Used for large components, brackets, containing high amounts of Cu, poor corrosion resistance. 3, rust-proof aluminum (LF) corresponds to the international brand 3000AL-Mn (aluminum) alloy. Heat treatment can not be enhanced, machinability, corrosion resistance and pure aluminum, strength has been improved, welding performance is good, widely used in daily necessities, building materials, devices and so on. 4, special aluminum (LT) corresponds to the international brand 4000AL-Si (aluminum silicon) alloy. The main welding material, low melting point (575-630 degrees), good fluidity and flow characteristics. 5, rust-proof aluminum (LF) corresponds to the international brand 5000AL-Mg (aluminum-magnesium) alloy. Heat treatment is not enhanced, corrosion resistance, weldability, and surface gloss are excellent. By controlling the content of Mg, different strength grades of alloys can be obtained. Less for decorative materials, advanced devices. Used in ships, vehicles, building materials. High welded components for ships, vehicle chemical plants. 6, 6000AL-Mg-Si alloy Mg2Si precipitation hardening heat treatment can strengthen the alloy, good corrosion resistance, moderate strength, excellent hot workability, and therefore used in large quantities as an extrusion material, forming a good performance by quenching to obtain higher hardness . Extensively used for building profiles, the industry is also a major source of materials. 7. Super hard aluminum (LC) corresponds to the international brand 7000AL-Zn-Mg-Cu (Al-Zn-Mg-Cu) high-strength aluminum alloy and AL-Zn-Mg welded component alloys. High strength, excellent welding and quenching properties The disadvantage is that the resistance to stress corrosion cracking is poor and needs to be improved by proper heat treatment. The former is mainly used for aircraft and sporting goods, and the latter is mainly used for welding structural materials for railway vehicles. The 8:8000 (AL-LI) Al-Li alloy is characterized by a density less than 7000 series 8% to 9%, high rigidity, high strength, light weight, the series is under development (metal alloy resistance under complex conditions The ability to decay has not yet been completely overcome. It is mainly used for military purposes such as aircraft, missiles, and engines.
