Spinning process of magnesium alloy wheel hub

A spinning process of a magnesium alloy wheel hub, wherein the spinning process comprises the following steps:

• Step 1, heating a magnesium alloy bar at 350-430° C. and keeping the temperature for 20 minutes;
• Step 2, initially forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 6-15 mm/s;
• Step 3, finally forging and forming on the bar under a forging press to obtain a final forged magnesium alloy blank, wherein the forging down-pressing speed is 5-8 mm/s;
• Step 4, stress relief annealing on the final forged magnesium alloy blank, the stress relief annealing temperature is 300-350° C., and the holding time of the stress relief annealing is 6-8 h;
• Step 5, solution treatment on the annealed magnesium alloy blank, the solution treatment temperature is 390-420° C., and the holding time of the solution treatment is 16-24 h;
• Step 6, taking out the blank after solution treatment and directly spinning by a spinning machine;
• Step 7, aging treatment.