The finished aluminum alloy wheels are treated with anti-oxidation. The present invention adopts a special cast rod. After forging and heat treatment, the tensile strength is 570MPa, the yield strength is 540MPa, and the elongation is 15%. Compared with the wheels of the same specification, the weight can be reduced to 17.2kg, which greatly reduces the weight of the product. Through the anti-oxidation treatment of the product, the problem of easy oxidation of aluminum alloy wheels is effectively solved, and the requirements of existing trucks for wheels can be met.

At this stage, the aluminum alloy wheels forged in our country use 6061 grade aluminum alloy (LD30). Compared with traditional steel wheels, it has the advantages of light weight, beautiful appearance, and good heat dissipation performance. However, due to the limitations of 6061 material, under the existing commonly used forging methods, its good mechanical properties can only reach the tensile strength of 350Mpa, the yield strength of 320MPa, the elongation is about 12%, and the finished product of a 6061 aluminum alloy truck wheel is about 25kg, so its tensile strength, yield strength, elongation and weight can no longer meet the requirements of existing trucks for wheels.

Forging: The front surface of the cast rod is pre-forged with a pressure forging machine, forged into a bowl shape, and then the back of the cast rod is forged once with a pressure forging machine, forged into a cylindrical shape, and the cast rod is rolled into a forged billet with a spinning machine. The forged billet is in the shape of the edge of therim.

Heat treatment: solid solution treatment of forged billet, solution temperature 465-475℃, solution time 2-3 hours, quenching within 15 seconds after solution treatment, quenching temperature 40-60°C, time 85-95 seconds, aging treatment after quenching, aging temperature 115-125°C, aging time 22-24 hours.