欢迎来到天天文库
浏览记录
ID:49228163
大小:604.74 KB
页数:6页
时间:2020-02-28
《ZK60镁合金往复挤压实验研究 优先出版.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第24卷第2期塑性工程学报Vol.24No.22017年4月JOURNALOFPLASTICITYENGINEERINGApr.2017引文格式:夏显明,薛克敏,李萍,等.ZK60镁合金往复挤压实验研究[J].塑性工程学报,2017,24(2):105-110.XIAXianming,XUEKemin,LIPing,etal.ExperimentalstudyonZK60magnesiumalloybycyclicextrusionandcompressions[J].JournalofPlasticit
2、yEngineering,2017,24(2):105-110.ZK60镁合金往复挤压实验研究1,2221夏显明,薛克敏,李萍,魏宝丽(1.安徽科技学院机械工程学院,安徽凤阳233100;2.合肥工业大学材料科学与工程学院,安徽合肥230009)摘要:通过塑性变形装置实现了挤压态ZK60镁合金往复挤压实验,探讨了显微组织演变过程和力学性能变化。结果表明:相比初始挤压态,350℃往复挤压后各个道次的试样具有更加优良的显微组织和力学性能。随挤压道次增加,显微组织晶粒更加细化,等轴细小晶粒增多,组织均匀性不断提
3、高;拉伸断口形貌显示随着道次增加,韧窝数量与深度明显增加,变形能力提高显著。拉伸实验数据表明,往复挤压很大程度上改善了ZK60镁合金的力学性能,特别是塑性变形能力。1道次往复挤压后,径向硬度都比原始态高,并随温度升高有下降的趋势,轴向硬度也随着温度升高而降低,390℃下试样轴向硬度与初始样硬度值接近;350℃下不同道次往复挤压后,试样中部径向、轴向硬度随道次增大而降低,而颈部径向硬度呈不规律性变化。关键词:ZK60镁合金;往复挤压;晶粒细化;组织与性能中图分类号:TG146.22文献标识码:A文章编号:1
4、007-2012(2017)02-0105-06doi:10.3969/j.issn.1007-2012.2017.02.018ExperimentalstudyonZK60magnesiumalloybycyclicextrusionandcompression1,2221XIAXian-ming,XUEKe-min,LiPing,WEIBao-li(1.SchoolofMechanicalEngineering,UniversityofScienceandTechnologyofAnhui,Fengy
5、ang233100,China;2.SchoolofMaterialsScienceandEngineering,HefeiUniversityofTechnology,Hefei230009,China)Abstract:TheevolutionprocessofmicrostructureandmechanicalpropertiesoftheextrudedZK60magnesiumalloybycyclicextrusionandcompression(CEC)experimentwerestud
6、ied.Theresultsindicatethatsampleforeachpasshasbettermechanicalpropertiesandmi-crostructureafterCECat350℃,comparedwiththeinitialextrudedsample.Withtheincreaseofpass,thegrainbecomesrefine,thenumberoffineequiaxedgrainsgrowsobviouslyandthestructurehomogeneity
7、isimprovedcontinuously.Thetensilefracturemorphologyshowsthatwiththeincreaseofpass,thenumberandthedepthofdimplesincreaseobviouslyanddeformationcapacityenhancessignifi-cantly.ThetensiletestdatashowsthatthemechanicalpropertiesofZK60magnesiumalloyareimprovedo
8、bviouslyafterCEC,especiallyplasticdeformationability.AfterCECdeformationforonepass,theradialhardnessishigherthanthatoftheinitialstateandshowsadownwardtrendwiththeincreaseofthetemperature;theaxialhardnessat390℃issimi
此文档下载收益归作者所有