Forged Wheels Production Process
Forged Wheels Production Process
1, aluminum alloy wheel material A356 is a cast aluminum alloy, it is Al-Si-Mg alloy, because it contains a lot of Si (content of 6.5-7.5%), so that A356 aluminum alloy has a good liquid flow and comprehensive Casting performance. However, the impact of such an aluminum alloy is reduced. Casting aluminum alloy wheels is the use of such aluminum silicon magnesium alloy production. 6061 alloy is a deformed aluminum alloy, which is usually said forged aluminum alloy, because of its liquid flow is not required, and its solid deformation requirements are relatively high, so its Si content of 0.4 to 0.8%. So its impact resistance is much stronger than the A356 cast aluminum. Most of the forged aluminum alloy wheels are forged with 6061 alloy.
2, aluminum alloy wheel production process, can be divided into casting, forging and between casting and forging between the manufacturing methods.
(1) aluminum wheel casting process (Liufeng, Wanfeng, dawn, etc. using this process) A356 aluminum alloy melting - degassing - casting - forming - T6 heat treatment - machining - surface treatment. Gravity casting aluminum wheel of the process, that is, the molten aluminum from the mold on the gate directly poured into the mold cooling molding. This simple casting method, mold cost is low. However, the riser is relatively large, aluminum consumption is large; pouring easily into the gas and impurities, flow and temperature stability is poor, therefore, casting defects are more. On this basis, the development of tilted weight casting can reduce these defects. Low-pressure casting aluminum wheel process, is in the mold below the aluminum liquid insulation furnace, through the riser directly through the aluminum liquid through the air pressure into the wheel model, the principle and the pressure type hot water bottle similar. This way the temperature and speed stability, will not be gas and impurities into the mold, therefore, casting defects are relatively small. As the riser is almost no, aluminum consumption is relatively small. On this basis, the development of differential pressure casting and atmosphere protection casting can reduce casting defects to a minimum. (2) forging manufacturing process (CITIC Daika, Daikai Hongxin, Lianyungang gem and so on using this process) 6061 aluminum alloy round bar - according to the rough weight cut into pieces - heated to about 400 degrees - in 8000 tons More than 3 times forging the initial molding - strong spinning machine final cold-forming - T6 heat treatment - machining - surface treatment, etc .. Through the aluminum alloy forging high density, grain refinement and The mechanical properties and strength of the fibrous structure are improved, and the mechanical properties and strength of the fiber are greatly improved, and the defects such as loose, stomatal and impact resistance of the cast aluminum alloy are avoided.Therefore, the same type of forged aluminum alloy wheel The mechanical properties of the wheels than the casting height of about 30%, while the weight can be done lighter than the latter about 20% .In addition, forged aluminum wheels with less silicon than the cast aluminum wheels, the density of large, so forged aluminum wheels Conductivity and thermal conductivity are better than casting aluminum wheels.Therefore, forged aluminum wheels can be carried out by anodic oxidation of the surface of the perfect coloring; good thermal conductivity can reduce the puncture and brake (3) between the casting and forging process extrusion casting (also known as melting soup forging), that is, after casting in the mold after the pressure, so that the grain refinement and increased density, increased Strength and reduce the weight of the current (Liaoning Zhongxiang Aluminum Co., Ltd. in the wheel group using this process) casting and spinning, is the use of casting rough through the spinning machine to squeeze the tire ring tire parts, so that the fetal ring parts of the grain Refinement and increase the density, enhance the mechanical properties to reduce the weight, as well as the domestic invention in recent years, the so-called continuous casting and forging technology.