Effect of Preheating Temperature on Hydrostatic Extending-Extrusion Forming of Magnesium Alloy Tube
The AZ80 magnesium alloy extrusion forming was numerically simulated by using the software Deform-3D.And the extrusion test was carried out. The effects of different preheating temperatures of the die, the die core and the extrusion container on hydrostatic extending-extrusion forming process were studied. The results show that the higher the preheating temperature is, the less the required extrusion pressure is and the easier the tube forming is; the temperatures of the die and die core has great impact on the peak of extrusion force, and the temperature of extrusion container mainly affects the stationeriness of extrusion force during the steady stage. The experiments show that when the temperature of the die, the die core and extrusion container is 250, 250, 20℃ separately, the tube can be completely formed, which verifies the feasibility of hydrostatic extending-extrusion forming for AZ80 magnesium alloy and the rationality of numerical simulation.