不同变形工艺对Mg-5Zn-1Y合金组织及性能的影响  

Effect of Different Deformation Processes on Microstructure and Properties of Mg-5Zn-1Y Alloy

作　　者：张利[1] 荆洪英[2] 

机构地区：[1]沈阳航空航天大学材料科学与工程学院,辽宁沈阳110136 [2]沈阳航空航天大学机电工程学院,辽宁沈阳110136

出　　处：《热加工工艺》2016年第21期43-46,共4页Hot Working Technology

基　　金：辽宁省教育厅项目(L2014071)

摘　　要：研究了Mg-5wt%Zn-1wt%Y合金在热挤压和热轧两种变形过程中组织及性能的变化。结果表明,两种变形工艺均能细化合金组织,提高合金性能。热轧后合金获得了20-30滋m均匀的晶粒和少量孪晶,合金的抗拉强度为291.4 MPa,断后伸长率为10.9%;而经过热挤压后的再结晶晶粒尺寸可达2μm,有部分未再结晶区域存在,合金的抗拉强度可达368.8 MPa,断后伸长率为13.4%。较高的强度源于极其细小的再结晶晶粒及弥散分布的第二相。The change of microstructure and properties of Mg-5wt%Zn-lwt%Y alloy during hot extrusion and hot rollingwas investigated. The results show that two kinds of deformation process can refine the alloy microstructure, and improve theproperties of the alloy. The grain with 20-30 μm and some twins in the alloy are obtained after hot rolling. The ultimatetensile strength and the elongation are 291.4 MPa and 10.9% respectively. While recrystallization grain size can reach 2 Ixmafter hot extrusion. There is still a part of the non-recrystallization region. The ultimate tensile strength and the elongation canreach 368.8 MPa and 13.4% respectively. The higher strength is owing to the extremely fine recrystallized grains and the finesecondary phase of dispersion distribution.

关 键 词：变形工艺 热挤压 热轧 Mg-5Zn-1Y 合金 再结晶 

分 类 号：TG379[金属学及工艺—金属压力加工]