RE和挤压工艺对AZ31镁合金组织及性能的影响  

Effects of Minor RE and Squeezing Casting on Microstructure and Properties of AZ31 Magnesium Alloy

作　　者：潘国如[1] 张勇强[1] 

机构地区：[1]华南理工大学金属新材料制备与成形广东省重点实验室

出　　处：《特种铸造及有色合金》2012年第6期565-567,共3页Special Casting & Nonferrous Alloys

摘　　要：加入0.3%～0.6%的混合稀土能使AZ31镁合金铸态组织得到细化,经热挤压后其力学性能更有所提高。挤压态在25℃时,抗拉强度为285～300MPa,伸长率为16%～21%。但稀土加入量>0.6%,其抗拉强度、伸长率有所下降。The as-cast microstructure of AZ31 magnesium alloy can be refined with 0.3%～0.6% MM（mistchmetal）,and mechanical properties of the alloy prepared are improved after hot extruding process.Tensile strength,elongation of the extruded alloy at room temperature reach 285～300 MPa and 16%～21%,respectively.However,with MM addition more than 0.6%,the tensile strength and elongation of the extruded alloy are decreased slightly.

关 键 词：混合稀土 热挤压 AZ31镁合金 组织及性能 

分 类 号：TG379[金属学及工艺—金属压力加工]