Device for production of magnesium alloy seamless tube

A production device for a magnesium alloy seamless tube, the device comprising:

• a) an integrated piercing and rolling roll having a roll surface that defines both a piercing deformation zone and a pipe rolling zone, wherein the piercing deformation zone is configured to pierce a magnesium alloy billet to form a tube blank, and the pipe rolling zone is configured to receive the tube blank from the piercing deformation zone and to roll the tube blank such that the tube blank directly enters a rolling deformation after piercing is completed, whereby a piercing load and a rolling traction force are shared on a single roll;
• b) at least a pair of driven support guide rolls disposed in a circumferential vacant region of the integrated piercing and rolling roll, wherein a roll surface of each of the driven support guide rolls comprises sections corresponding respectively to the piercing deformation zone and the pipe rolling zone, for constraining radial flow of the tube blank during formation;
• c) a piercing plug disposed within the piercing deformation zone;
• and
• d) a mandrel threadedly connected to the piercing plug and extending into the pipe rolling zone, wherein the piercing plug comprises a liner boss positioned corresponding to the pipe rolling zone.