Finite Element Simulation And Experiment Research On Rolled Of Magnesium Alloy Seamless Pipe

Compared with the commonly used metal materials, such as aluminum alloys and titanium alloys, as the most promising metal material in 21 st century, magnesium alloys not only have better specific strength and specific stiffness, but also have a greater advantage in density and price. But the disadvantage of poor ductility of magnesium alloys leads to the slow development of plastic forming. Therefore, the study of magnesium alloy plastic forming process has important practical significance. Taking AZ31 magnesium alloy tube as the research object, this paper studies the roll-forming technology of magnesium alloy seamless tube, and researches the law of microstructure evolution during rolling deformation and its related mechanism problems.In this paper, using the finite element software DEFORM-3D, Assel three-roll skew rolling magnesium alloy seamless pipe process was simulated. There are many parameters that affected magnesium alloy rolled in the rolling process. This paper combined with magnesium alloy seamless pipe rolling test, select a greater impact on its process parameters – temperature to perform simulation analysis. By setting different temperatures and studying effective stress, effective strain, rolling force in the entire rolling process, the rolling mechanism of magnesium alloy seamless tube and the influence of temperature on the rolling process were obtained, and get better rolling process parameters, which provide a reliable theoretical basis for the future magnesium alloy seamless tube rolling.Finally, using the obtained process parameters on the simulation, this paper verified the magnesium alloy seamless pipe rolling process, and 380℃ is a better rolling process parameters, and can smoothly roll out shape, dimension and surface quality are within the allowable error range of magnesium alloy seamless tubes. Having compared the microstructure of before and after rolling, twin dynamic recrystallization occurred in the rolled magnesium alloy tube, which get refined grain obviously. So that enhances the mechanical properties and mechanical properties of AZ31 magnesium alloy seamless tubes, which has a certain significance for the future study of the pipe material of wrought magnesium alloy.