AZ31镁合金加工图研究

Analysis on Processing Map of AZ31 Magnesium Alloy

采用加工图理论系统的分析了AZ31镁合金在高温变形过程中的变形行为。结果表明：AZ31镁合金在塑性变形行为过程中发生动态再结晶,温度的升高和应变速率的降低有利于动态再结晶形核的形成与长大。采用加工图理论分析AZ31镁合金高温下的塑性变形行为并至关反映变形后AZ31镁合金材料的组织演化以及性能变化规律。由加工图可知材料的最佳变形条件：压缩变形过程温度为320℃~360℃、应变速率为0.5~0.05 s-1;拉伸变形过程温度为350℃~400℃、应变速率为0.001~0.000 33 s-1.

The deformation behavior of AZ31 magnesium alloy at high-temperature deformation process was systematically analyzed with adoption of processing map theory. The results showed that： dynamic recrystallization process,temperature rise and reduction of strain rate of AZ31 magnesium alloy during its plastic deformation process are in favor of formation and growth of dynamic recrystallization nucleation. Processing map theory was used to accurately analyze high-temperature plastic deformation behavior of AZ31 magnesium alloy and intuitively reflect the laws of organizational evolution and performance change under different conditions. The processing map gives the best material deformation conditions： compression deformation temperature is 320 ℃ ~ 360 ℃,strain rate is 0. 5 ~ 0. 05s-1; tensile deformation temperature is 350 ℃ ~ 400 ℃ and strain rate is 0. 001 ~ 0. 000 33 s-1.