Forging process of magnesium alloy wheel hub

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

• step 1, heating a magnesium alloy bar having an initial length to 350-420° C. and keeping the temperature for 20 minutes;
• step 2, forging and forming the bar in a multistep process by a forging press to form a wheel hub forging stock having a thickness;
• and
• Step 3, machining the hub forging stock to make the magnesium alloy wheel hub,
• wherein the step 2 comprises the following sub-steps:
• pressing the bar down from the initial length to ⅔ of the initial length at a down-pressing speed of 12-15 mm/s;
• pressing the bar down from ⅔ of the initial length to ⅓ of the initial length at a down-pressing speed of 9-13 mm/s;
• and
• pressing the bar down from ⅓ of the initial length to the thickness of wheel hub forging stock at a down-pressing speed of 6-10 mm/s.