With the development of society, automobiles have become an indispensable means of transportation. As an important part of automobiles, the quality of tourism hubs not only affects the appearance of automobiles, but also the aluminum alloyhubWith its light weight, high strength, good braking balance, high precision and other characteristics, it affects the safety of the car, and it has good thermal conductivity and reduces the fuel consumption of the car.
theAluminum alloy wheelsThe casting process includes the following steps: melting the aluminum alloy material, obtaining molten aluminum, adjusting the temperature of the molten aluminum to 730-760°C, adding aluminum, titanium and boron for refining treatment, releasing the molten aluminum, degassing with high-purity nitrogen, and then transferring to low-pressure casting Machine holding furnace, holding temperature 680-700 ℃.
Pressurize the molten aluminum, use the riser to fill the cavity, and maintain the pressure. During the pressure maintaining period, the temperature of the die mouth is controlled at 490-520°C, and the temperature of the small ring of the crystallizer (that is, the PCD position) is 475-500°C. The pressing time is 280-300s.
Molds, castings and solid solution treatment and incomplete artificial aging heat treatment, automatic rolling in the cast solid heat treatment furnace, heating to 540+/-5°C, holding time 4.5h~6h, soaking in water for 25s, water temperature controlled at 80+/- -5°C, after the aging heat treatment furnace, the aging temperature is 160+5°C, and the holding time is 2.5h. After the aging treatment, cool the wheel casting to room temperature, and process it into a coating at room temperature for 8h.