往复挤压对Mg-0.85Zn-0.15Y-0.6Zr铸态组织和力学性能的影响  

Effects of Reciprocating Extrusion on Microstructures and Mechanical Properties of as-Cast Mg-0.85Zn-0.15Y-0.6Zr Alloys

作　　者：李安涛[1] 王锦程[1] 司林[1] 赖云亭[1] 杨根仓[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《稀有金属材料与工程》2011年第3期515-518,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50671083);陕西省自然科学基金(2007E101)项目

摘　　要：研究了往复挤压对准晶增强Mg-0.85Zn-0.15Y-0.6Zr铸态合金显微组织及力学性能的影响。结果表明,往复挤压可大幅度细化Mg-0.85Zn-0.15Y-0.6Zr铸态合金组织,且使I相等相对均匀地分布在α-Mg基体中。同铸态合金相比,挤压后Mg-0.85Zn-0.15Y-0.6Zr合金的屈服强度、抗拉强度和延伸率分别提高了75.8%,43.2%和35%。Effects of reciprocating extrusion on the microstructures and mechanical properties of as-cast Mg-0.85Zn-0.15Y-0.6Zr alloys enforced by quasicrystal particles were investigated by OM,SEM and XRD.The results show that the reciprocating extrusion can greatly refine the microstructure of as-cast Mg-0.85Zn-0.15Y-0.6Zr alloy,and make I phase relatively uniformly distribute in the α-Mg matrix.Compared with that of the as-cast alloy,the yield strength,tensile strength and elongation of the Mg-0.85Zn-0.15Y-0.6Zr magnesium alloys after reciprocating extrusion are increased by 75.8%,43.2% and 35%,respectively.

关 键 词：往复挤压 微观组织 力学性能 

分 类 号：TG379[金属学及工艺—金属压力加工]