锻造工艺对BT25钛合金组织和性能影响.pdfVIP

HotWorkingTechnology2019,Vol.48,No.21

锻造工艺对BT25钛合金组织和性能影响

朱红I孙捷7凌敏彳

(1.贵州工业职业技术学院，贵州贵阳550002.贵州大学材料与洽金学院，贵州贵阳550025;3.贵刑理工学院材料

与冶金工程学院，贵州贵阳550003)

摘要：研究了锻造温度、锻后冷却方式和变形量对BT25钛合金的显微组织和室温力学性能的影响。结果表明：随

着锻造温度升高,BT25钛合金的显微组织从双态组织逐渐变成魏氏组织。锻后水冷抑制次生a相的析出，最终获得细片

状的a相组织。变形量越大，合金的再结晶越充分。在空冷和水冷下，合金的室温力学性能变化趋势相似。随着锻造温度

从975°C升高到1055°C,BT25合金的强度先升高后降低，而塑性一直降低。

关键词：锻造温度；锻后冷却；变形量；显微组织；力学性能

DOI:10.14158/j.cnki.1001-3814.2019.21.024

中图分类号:TG319文献标识码：A文章编号：1001-3814(2019)21-0102-03

EffectofForgingProcessonMicrostructureandProperties

ofBT25TitaniumAlloy

ZHUHong1,SUJie2,LINGMing3

(1.GuizhouCollegeofIndustrialTechnology,Guiyang550008,China;2.SchoolofMaterialsandMetallurgy,Guizhou

University,Guiyang550025,China;3.SchoolofMaterialsandMetallurgicalEngineering,GuizhouInstituteofTechnology,

Guiyang550003,China)

Abstract:Theeffectsofforgingtemperature,coolingmodeafterforgingandamountofdeformationonthemicrostructure

androomtemperaturemechanicalpropertiesofBT25titaniumalloywerestudied.Theresultsshowthatwiththeincreaseof

forgingtemperature,themicrostructureofBT25titaniumalloygraduallychangesfromdoublestatetoWidmannstatten

microstructure.Watercoolingafterforginginhibitstheprecipitationofsecondaryaphaseandfinallyfinelamellaraphase

microstructureisobtained.Thelargertheamountofdeformationis,themorefullyrecrystallizedthealloyis.Underaircooling

andwatercooling,thetrendsofmechanicalpropertiesofthealloyaresimilar.Withtheincreaseofforgingtemperaturefrom

975°Cto1055°C,thestrengthofBT25alloyfirstlyincrea