固溶处理对Ti-22Al-25Nb合金棒材组织与拉伸性能的影响.pdfVIP

HotWorkingTechnology2020,Vol.49,No.18

固溶处理对Ti-Al-25Nb合金棒材

组织与拉伸性能的影响

覃佳栋*，马雄史晓强2张熹雯3王红卫惠瑞拓\王莹1

(1.中国航发动力股份有限公司工艺技术中心，陕西西安710021;2.北京钢研高纳科技股份有限公司，北京100081;

3.钢铁研究总院高溫材料研究所，北京100081)

摘要：以Ti-Al-25Nb合金棒材为试验对象，研究了固溶温度对合金棒材组织和室温拉伸性能的影响。结果表

明：随着固溶温度的升高，〇^0相颗粒含量明显减少，B相体积分数增加；合金的拉伸性能也随之变化，强度随固溶温

度的升高而增加，塑性略有下降；断口形貌显示，Ti-Al-25Nb合金在拉伸断裂过程中以准解理断裂为主。

关键词：Ti-Al-25Nb合金；固溶温度；组织演变；拉伸性能

DOI:10.14158/j.cnki.1001-3814.2020095

中图分类号：TG166.5文献标识码：A文章编号：1001-3814(2020)18-0144-04

EffectsofSolutionTreatmentonMicrostructureandTensileProperties

ofTi-22Al-25NbAlloyBar

QWJiadong1,MAXiong23,SHXiaoqiang2-5,ZHANGXiwen23,

WANGHongwei23,HURuituo,WANGYing

(1.ProcessTechnologyCenter,AECCAviationPowerCo.,Ltd.,Xian710021,China;2.BeijingCisri-gaonaMaterials

TechnologyCo.,Ltd.,Beijing100081,China;3.HighTemperatureMaterialsResearchInstitute,CentralIronSteel

ResearchInstitute,Beijing100081,China)

AbstractTakingTi-：Al-25Nballoybarsasexperimentsubject,theeffectsofsolidsolutiontemperaturesonthe

microstructureandtensilepropertiesofthealloybaratroomtemperaturewerestudied.Theresultsshowthat,thecontentof

thea2/〇phasedecreasesobviouslywiththeincreaseofthesolidsolutiontemperature,andthevolumefractionoftheB2

phaseincreases.Inaddition,thetensilepropertiesofthealloyalsochange,thestrengthincreasewiththeincreaseofthe

solutiontemperature,andtheplasticitydecreasesslightly.ThefracturemorphologiesshowthatTi-Al-25Nbal