【摘要】：以不同硅含量(0.5%、1.5%)的Mg-Al-Si合金為原料,在自制的120°轉(zhuǎn)角的等通道轉(zhuǎn)角模具中,以Bc路徑進行多道次等通道擠壓實驗,研究擠壓工藝對鎂合金組織及力學性能的影響。實驗發(fā)現(xiàn):在料溫為400℃,模具溫度為380~400℃時,可以擠壓出宏觀無裂紋,外形完整,微觀組織趨向均勻且存在Mg2Si相的試樣;與原始鑄態(tài)尺寸50~100μm相比,隨擠壓次數(shù)增加,多次擠壓后晶粒明顯細化,并且組織更加均勻。從力學性能對比發(fā)現(xiàn),擠壓后試樣的硬度、抗拉強度和伸長率隨擠壓次數(shù)增加明顯增加;拉伸斷口呈韌窩狀,隨著擠壓道次的增加,韌窩尺寸減小,韌窩數(shù)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 擄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，

本文編號：2120505