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对变形镁合金AZ31进行了横向和高向锻造,然后进行轧制,检测了不同锻造比的板坯经轧制后的组织性能变化。结果表明:锻造时,随着锻造比的增大,晶粒组织逐渐细化;当锻造比为1.67时,材料的硬度达到最大值84.4HV,当锻造比为1.82时,材料的硬度为78.9HV;晶粒大小对动态再结晶晶粒尺寸有很大影响,晶粒尺寸较大时,再结晶晶粒尺寸也较大;锻造比为1.82的试样经轧制变形后,可以获得良好的力学性能。其晶粒平均尺寸、抗拉强度和伸长率为分别为3.7μm、281.75MPa、12.7%。
The as-cast AZ31 magnesium alloy was forged in the transverse direction and in the high direction, and then rolled. The changes in the microstructure and properties of the slabs with different forging ratios were investigated. The results show that the grain size decreases with the increase of the forging ratio, and the maximum hardness reaches 84.4HV when the forging ratio is 1.67. The hardness of the material is 78.9HV when the forging ratio is 1.82 . The grain size has a great influence on the dynamic recrystallization grain size. When the grain size is larger, the recrystallized grain size is also larger. The sample with the forging ratio of 1.82 can get good mechanical properties after rolling deformation performance. The average grain size, tensile strength and elongation were 3.7μm, 281.75MPa and 12.7% respectively.