摘要
采用重力铸造法制备了Mg-16Al-12Zn-4Si-x Ca-y Sb合金,研究了Ca和Sb添加对合金组织及力学性能的影响。结果表明,未添加Ca、Sb时,合金主要由α-Mg基体、β-Mg17Al12、Mg2Si及Mg Zn2四相组成;添加微量Ca、Sb后,出现了Mg3Sb2和CaSi2新相,初生Mg2Si相由粗大的骨骼状转变为多边形块状;随Ca含量的增加,合金的抗拉强度先提高后降低。合金断裂形式为准解理脆性断裂。
Mg-16Al-12Zn-4Si-x Ca-y Sb magnesium alloy was prepared by gravity casting method.The effects of Ca and Sb addition on the microstructure and mechanical properties of Mg-16Al-12Zn-4Si magnesium alloy were investigated.The results show that the alloy is composed ofα-Mg matrix,β-Mg17Al12,Mg2Si and Mg Zn2phases before the addition of Ca and Sb.After the addition of Ca and Sb,the new phases Mg3Sb2and CaSi2appear,the primary phase morphology of Mg2Si transforms from coarse skeleton to polygon massive.The tensile strength of the alloy increases firstly and then decreases with the increase of Ca addition.The fracture mode of the alloy is quasi-cleavage brittle fracture.
作者
祝战科
宋佩维
李明
ZHU Zhanke;SONG Peiwei;LI Ming(Shaanxi Polytechnic Institute,Xianyang 712000,China;School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723001,China)
出处
《热加工工艺》
北大核心
2019年第18期55-58,64,共5页
Hot Working Technology
基金
陕西省自然科学基金资助项目(2010JM6009)
