挤压工艺对Mg-4Al-1Zn-0.6Ca-0.6Si-0.4Nd合金组织和力学性能的影响  

Influence of Extrusion on Microstructure and Mechanical Properties of Mg-4Al-1Zn-0.6Ca-0.6Si-0.4Nd Alloy

作　　者：韩敏玉[1] 张修庆[1] 陈舸[1] 汪洋[1] 

机构地区：[1]华东理工大学机械与动力工程学院,承压系统与安全教育部重点实验室(华东理工大学),上海200237

出　　处：《热加工工艺》2013年第3期5-7,10,共4页Hot Working Technology

基　　金：上海市自然科学基金资助项目(12ZR1407400)

摘　　要：研究了不同挤压温度和挤压比对Mg-4Al-1Zn-0.6Ca-0.6Si-0.4Nd镁合金显微组织和力学性能的影响。结果表明,挤压变形可以显著细化镁合金的晶粒,大幅度提高材料的抗拉强度,屈服强度和伸长率。较低的挤压温度和较高的挤压比配合可以更好地细化晶粒。在挤压比为16,挤压温度为330℃时,合金的抗拉强度、屈服强度、伸长率分别达到375MPa、305MPa、14%。The influences of different extrusion temperature and ratios on the microstructure and mechanical properties of Mg-4Al-1Zn-0.6Ca-0.6Si-0.4Nd alloy were investigated. The results show that extrusion deformation can evidently refine the grains of the alloy. The tensile strength, yield strength and elongation were enhanced significantly. The grains become finer at lower extrusion temperature and bigger ratio. When extrusion ratio is 16 and extrusion temperature is 330℃, the tensile strength, yield strength and elongation of the alloy separately achieves 375 MPa, 305 MPa and 14%.

关 键 词：镁合金 挤压 晶粒细化 再结晶 

分 类 号：TG376.2[金属学及工艺—金属压力加工]