辛景景等：高Nb一TiAl合金叶片锻造模拟 ·537· (2)上模具压下速度增大，导致锻造时间和锻坯 现状.材料导报，2000,14(7)：15) 温降减少，变形过程中等效应力降低，提高终锻温度， [5]Viswanathan CB,Vasudevan VK.Processing microstructure and 促进动态再结晶的发生，上模具压下速度应在1.0~ tensile properties of a Ti-48at%Al alloy.Scripta Metall Mater, 1995,32(10):1705 1.5mms之间. [6]Zhang W J,Francesconi L,Evangelista E,et al.Characterization (3)预热温度升高，By高Nb-Til合金变形过 of Widmanstaitten laths and interlocking boundaries in fully-amel- 程中等效应力降低，锻坯预热温度为1250~1300℃能 lar TiAl-base alloy.Scripta Mater,1997,37 (5):627 够促进动态再结晶，提高锻件质量. 7]Naka S,Thomas M,Khan T.Potential and prospects of some in- termetallic compounds for structural applications.Mater Sci 参考文献 Technol,.1992,213(4):291 [1]Bystrzanowski Bartels A,Clemens H,et al.Characteristics of [8]Kimura M,Hashimoto K,Morikawa H.Study on phase stability the tensile flow behavior of Ti-46Al-9Nb sheet material:analysis in Ti-Al-X systems at high temperatures.Mater Sci Eng A, of thermally activated processes of plastic deformation.Intermetal- 1992,152(12):54 ic,2008,16(5):717 9]Kim Y W.Intermetallic alloys based on gamma titanium alumin- Wang Y H.Lin J P.Xu X J,et al.Effect of fabrication process ide.J0M,1989,41(7):24 on microstructure of high Nb containing TiAl alloy.J Alloys [10]Niu H Z,Chen YY,Xiao S L,et al.High temperature deform- Compd,2008,458(12):313 ation behaviors of Ti-45Al-2Nb-1.5V-1Mo-Y alloy.Interme- 3]Wang Y H,Lin JP,He Y H,et al.Microstructure and mechani- tallics,2011,19(12):1767 cal properties of as-east Ti-45Al-8.5Nb-(W,B,Y)alloy with [11]Zheng J Z,Zhang L Q,Hou Y M,et al.Quasi isothermal forg- industrial scale.Mater Sci Eng A,2007,471(12):82 ing simulation of B-y TiAl alloy containing high content of Nb. 4]Yan Y Q,Wang W S,Zhang Z Q.et al.Current R&D on TiAl Acta Metall Sin,2013,49(11):1439 based alloys containing Nb.Mater Rer,2000,14(7):15 (郑君姿，张来启，侯永明，等.By高Nb-五A合金准等温 (闫蕴琪，王文生，张振祺，等.N-Al金属间化合物研究 锻造过程模拟.金属学报，2013,49(11)：1439)辛景景等: 高 Nb--TiAl 合金叶片锻造模拟 ( 2) 上模具压下速度增大，导致锻造时间和锻坯 温降减少，变形过程中等效应力降低，提高终锻温度， 促进动态再结晶的发生，上模具压下速度应在 1. 0 ～ 1. 5 mm·s － 1之间． ( 3) 预热温度升高，β--γ 高 Nb--TiAl 合金变形过 程中等效应力降低，锻坯预热温度为 1250 ～ 1300 ℃ 能 够促进动态再结晶，提高锻件质量． 参 考 文 献 ［1］ Bystrzanowski S，Bartels A，Clemens H，et al． Characteristics of the tensile flow behavior of Ti--46Al--9Nb sheet material: analysis of thermally activated processes of plastic deformation． Intermetal￾lics，2008，16( 5) : 717 ［2］ Wang Y H，Lin J P，Xu X J，et al． Effect of fabrication process on microstructure of high Nb containing TiAl alloy． J Alloys Compd，2008，458( 1-2) : 313 ［3］ Wang Y H，Lin J P，He Y H，et al． Microstructure and mechani￾cal properties of as-cast Ti--45Al--8． 5Nb--( W，B，Y) alloy with industrial scale． Mater Sci Eng A，2007，471( 1-2) : 82 ［4］ Yan Y Q，Wang W S，Zhang Z Q，et al． Current Ｒ＆D on TiAl based alloys containing Nb． Mater Ｒev，2000，14( 7) : 15 ( 闫蕴琪，王文生，张振祺，等． Nb--TiAl 金属间化合物研究 现状． 材料导报，2000，14( 7) : 15) ［5］ Viswanathan G B，Vasudevan V K． Processing microstructure and tensile properties of a Ti--48at% Al alloy． Scripta Metall Mater， 1995，32( 10) : 1705 ［6］ Zhang W J，Francesconi L，Evangelista E，et al． Characterization of Widmansttten laths and interlocking boundaries in fully-lamel￾lar TiAl-base alloy． Scripta Mater，1997，37( 5) : 627 ［7］ Naka S，Thomas M，Khan T． Potential and prospects of some in￾termetallic compounds for structural applications． Mater Sci Technol，1992，213( 4) : 291 ［8］ Kimura M，Hashimoto K，Morikawa H． Study on phase stability in Ti--Al--X systems at high temperatures． Mater Sci Eng A， 1992，152( 1-2) : 54 ［9］ Kim Y W． Intermetallic alloys based on gamma titanium alumin￾ide． JOM，1989，41( 7) : 24 ［10］ Niu H Z，Chen Y Y，Xiao S L，et al． High temperature deform￾ation behaviors of Ti--45Al--2Nb--1． 5V--1Mo--Y alloy． Interme￾tallics，2011，19( 12) : 1767 ［11］ Zheng J Z，Zhang L Q，Hou Y M，et al． Quasi isothermal forg￾ing simulation of β--γ TiAl alloy containing high content of Nb． Acta Metall Sin，2013，49( 11) : 1439 ( 郑君姿，张来启，侯永明，等． β--γ 高 Nb--TiAl 合金准等温 锻造过程模拟． 金属学报，2013，49( 11) : 1439) · 735 ·