ZK60_AZ31异种镁合金搅拌摩擦焊接头的组织与性能研究.pdfVIP

HotWorkingTechnology2019,Vol.48,No.1

ZK60/AZ31异种镁合金搅拌摩擦焊接头的

组织与性能研究

田菲】，陈海俊梁炬星2,卢志安\刘德仁4

(1.商丘工学院，河南商丘476000;2.中国中车，江苏南京210031;3.郑州大学，河南郑州450001;4.重庆大学，

重庆400044)

摘要：研究了ZK60/AZ31异种镁合金搅拌摩擦焊接头的显微组织、微区织构、显微硬度和力学性能。结果表明，

ZK60合金侧和AZ31合金侧焊缝区的晶粒尺寸都相对母材更加细小，且ZK60合金侧热影响区、冠状区和搅拌区的平

均晶粒尺寸都要小于AZ31合金侧相应区域;ZK60/AZ31镁合金焊接接头的屈服强度在AZ31合金母材和ZK60合金

母材之间，而断后伸长率远小于两种合金母材;ZK60合金侧搅拌区边部、搅拌区中心和AZ31合金侧搅拌区边部的李

晶体积分数分别为7.7%.2.8%和32.3%；ZK60/AZ31镁合金焊接接头的断裂位于后退侧AZ31合金侧过渡区与搅拌区

界面处。

关键词：ZK60/AZ31镁合金;搅拌摩擦焊；组织；性能

DOI:10.14158/j.cnki.1001-3814.2019.13.010

中图分类号：TG45319文献标识码：A文章编号:1001-3814(2019)13-0038-05

StudyonMicrostructureandPropertiesofZK60/AZ31Dissimilar

MagnesiumAlloyFrictionStirWeldedJoint

TIANFei1,CHENHaijun1,LIANGJuxing2,LUZhian,LIUDeren4

(1.ShangqiuInstituteofTechnology,Shangqiu476000,China;2.CRRCCorporationLimited,Nanjing210031,China;

3.ZhengzhouUniversity,Zhengzhou450001,China;3.ChongqingUniversity,Chongqin,400044,China)

Abstract:Themicrostructure,microtexture,microhardnessandmechanicalpropertiesofZK60/AZ1dissimilar

magnesiumalloyfrictionstirweldedjointwerestudied.TheresultsshowthatthegrainsizesoftheweldzoneatZK60alloy

sideandAZ1alloysidearerelativelyfinerthanbasemetal,theaveragegrainsizesofheataffectedzone,coronaryzoneand

stirzoneatZK60alloysidearesmallerthanthatofthecorrespondingregionofAZ1alloyside;Theyieldstrengthofthe

ZK60/AZ1jointisbetweenthoseofAZ1alloyandZK60alloybasemetal,whiletheelongationisfarlessthanthoseofthe

twoalloy.ThetwinningvolumefractionsofthesideofstirzoneatZK60alloyside,thecentero