Ce和均匀化对Mg-2.0Zn-1.0Mn镁合金组织和性能的影响

Effect of Ce and homogeneous annealing on microstructure and deformation performance of Mg-2.0Zn-1.0Mn alloy

在Mg-2.0Zn-1.0Mn镁合金中添加稀土Ce进行均匀化和挤压实验,分析稀土Ce和均匀化对ZM21镁合金组织和性能的影响规律。结果表明,添加稀土Ce可以有效细化ZM21合金的晶粒,提高ZM21镁合金的力学性能,降低ZM21镁合金凝固过程中的潜热和凝固温度范围。均匀化退火对ZM21镁合金挤压制品的性能和组织影响较小,但对ZM21+Ce镁合金的性能和组织影响明显,两种合金的断口均为混合型断裂,其中ZM21+Ce镁合金倾向于韧性断裂。

The Mg-2.0Zn-l.0Mn magnesium alloys add Ce were deformed with extrusion simulation system, the mechanism properties of Ce element and homogenizing in Mg-2.0Zn-l.0Mn magnesium alloys and its effect on microstructure were analyzed. The results showed that the addition of Ce can effectively refine the grain ZM21 alloy to improve the mechanical properties of magnesium alloy ZM21 reduce ZM21 magnesium alloy solidifica- tion process of latent heat and solidification temperature range. Homogenization of ZM21 magnesium alloy ex- trusion products less affected by the performance and organization, but ZM21＋Ce magnesium alloy perform- ance and organizational impact was clear that the fracture of the two alloys are mixed fracture, in which the tendency of magnesium alloy ZM21＋Ce in ductile fracture.