等通道转角挤压对镁铝硅合金组织性能的影响研究
发布时间：2018-07-13 19:31
【摘要】：以不同硅含量(0.5%、1.5%)的Mg-Al-Si合金为原料,在自制的120°转角的等通道转角模具中,以Bc路径进行多道次等通道挤压实验,研究挤压工艺对镁合金组织及力学性能的影响。实验发现:在料温为400℃,模具温度为380~400℃时,可以挤压出宏观无裂纹,外形完整,微观组织趋向均匀且存在Mg2Si相的试样;与原始铸态尺寸50~100μm相比,随挤压次数增加,多次挤压后晶粒明显细化,并且组织更加均匀。从力学性能对比发现,挤压后试样的硬度、抗拉强度和伸长率随挤压次数增加明显增加;拉伸断口呈韧窝状,随着挤压道次的增加,韧窝尺寸减小,韧窝数量增多,塑性增加。
[Abstract]:Using Mg-Al-Si alloy with different silicon content (0.5% and 1.5%) as raw material, the multi-pass secondary channel extrusion experiment was carried out by using BC path in 120 掳angle equal channel die. The effect of extrusion process on microstructure and mechanical properties of magnesium alloy was studied. The experimental results show that when the material temperature is 400 鈩，
本文编号：2120505
[Abstract]:Using Mg-Al-Si alloy with different silicon content (0.5% and 1.5%) as raw material, the multi-pass secondary channel extrusion experiment was carried out by using BC path in 120 掳angle equal channel die. The effect of extrusion process on microstructure and mechanical properties of magnesium alloy was studied. The experimental results show that when the material temperature is 400 鈩，
本文编号：2120505
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