[China Aluminum Network] Wheel hubs are one of the more important safety components in automobiles. They are divided into steel hubs and aluminum hubs. The hubs are subjected to the pressure of the vehicle and the quality of loads, and are subject to the dynamics of the vehicle when starting and braking. The role of torque, but also bear the car in the driving process of turning, bumpy roads, road obstacles and other impact from the direction of the dynamic load generated by the alternating alternating force. The quality and reliability of wheel hubs not only affect the safety of vehicles and people on board, but also affect the smoothness, maneuverability, and comfort of the vehicle. This requires a good balance of wheels and high fatigue strength. With good rigidity and elasticity, high dimensional and shape accuracy, and light weight, aluminum wheels meet these requirements with its excellent overall performance, and have outstanding performance in terms of safety, comfort, and lightweight, winning the favor of the market. Gradually replacing steel wheels becomes a better choice. The main production process flow for automotive aluminum wheels is: melting → refining → material testing → low-pressure casting → X-ray inspection → heat treatment → machining → dynamic balance testing → airtightness testing → painting.