锻造工艺对Ti-22Al-25Nb合金Φ400mm规格棒材组织与性能的影响  

Effect of forging process on microstructure and properties of Ti-22Al-25Nb alloy large-sized bars

作　　者：史晓强 马雄 石雨非[1,2] 梁晓波 张建伟 SHI Xiaoqiang;MA Xiong;SHI Yufei;LIANG Xiaobo;ZHANG Jianwei(Beijing Cisri-gaona Materials and Technology Co.,Ltd.,Beijing 100081,China;High Temperature Materials Research Institute,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 10o08l,China)

机构地区：[1]北京钢研高纳科技股份有限公司,北京100081 [2]钢铁研究总院有限公司高温材料研究所,北京100081

出　　处：《金属功能材料》2023年第5期15-21,共7页Metallic Functional Materials

基　　金：国家科技重大专项项目(2017-VI-0004-0074,JPPT-135-2-030)。

摘　　要：通过三维换向锻造工艺试制Ti-22Al-25Nb合金Φ400mm大规格棒材,研究了三维换向锻造的极限变形量;分析了在B2+α_(2)+O三相区进行不同三维换向锻造次数与生产的棒材组织、力学性能和探伤杂波水平的差异。结果表明:三维换向锻造的极限变形量为50%;在B2+α_(2)+O三相区进行三维换向成品锻造,当三维换向锻造次数达到3次时,可制备出组织均匀性好、力学性能和探伤结果优异的Ti-22Al-25Nb合金400mm大规格棒材。Ti-22Al-25Nb alloy of$400 mm large-bar was produced by three-dimensional reversing forging process,the limit deformation of three-dimensional reversing forging is studied,the difference of the microstructure and mechanical properties of the bar produced by different times of three-dimensional reversing forging in the B2+α_(2)+O three phase zone is analyzed.The results show that the limit deformation of three-dimension reversing forging is 50%.When the number of three-dimensional reverse forging in B2+α_(2)+O three phase zone reaches 3,Ti-22Al-25Nb alloy 400 mm large specification bars with good microstructure uniformity,excellent mechanical properties,and flawdetection results can beprepared.

关 键 词：TI-22AL-25NB合金 锻造工艺 大规格棒材 三维换向 

分 类 号：TG316[金属学及工艺—金属压力加工] TG146.23[一般工业技术—材料科学与工程]