第6期 于秋颖等：亚固溶温度热处理对GH720Li难变形高温合金相的影响 ·769· 双时效处理时，部分一次'相转变成球形或近球 treatment and chemistry on the long-term phase stability 形，二次Y相尺寸有所增大，二次和三次Y相补 of a high strength nickel-based superalloy /Superalloys 充析出的程度更加明显. 1992.Warrendale,1992:415 (3)870℃时效500h时，合金组织变得均匀， [8]Torster F,Baumeister G,Albrecht J,et al.Influence of grain size and heat treatment on the microstructure and 二次和三次Y相完全回溶，一次Y'相则主要钉扎 mechanical properties of the nickel-base superalloy U 720 于晶界：随着时效时间继续延长，一次相有所粗 Li.Mater Sci Eng A,1997,234-236:189 化但不明显：GH720Li合金平均硬度在长期时效过 [9]Mao J.Chang K M,Yang W,et al.Cooling precipitation 程中逐渐降低而后基本保持HB350不变. and strengthening study in powder metallurgy superalloy U720Li.Metall Trans A,2001,32(10):2441 [10]Radis R,Schaffer M,Albu M,et al.Evolution of size and 参考文献 morphology of y'precipitates in UDIMET 720 LI dur- ing continuous cooling /Superalloys 2008.Warrendale. [1]Furrer D U,Fecht F J.Y'formation in superalloy U720LI. 2008:829 Scripta Mater,1999.40(11):1215 [11]Qiu YY.Retarded coarsening phenomenon of y particles [2]Jackson M P,Reed R C.Heat treatment of UDIMET in Ni-based alloy.Acta Mater,1996,44(12):4649 720Li:the effect of microstructure on properties.Mater [12]Doi M,Miyazaki T,Wakatsuki T.The effects of elastic in- Sci Eng A.1999,259(1):85 [3]Yu Q Y,Dong J X,Zhang M C,et al.Thermodynamic teraction energy on the y precipitate morphology of con- tinuously cooled nickel-base alloys.Mater Sci Eng,1985 calculation on equilibrium precipitated phases in GH720Li 74(2):139 superalloy.Rare Met Mater Eng:2010,39(5):857 (于秋颖，董建新，张麦仓，等.难变形高温合金GH720Li [13 Qiu YY.The splitting behavior of y'particles in Ni-based 平衡析出相的热力学计算.稀有金属材料与工程，2010， alloys.J Alloys Compd,1998,270(1):145 39(5):857) [14]Hazotte A,Grosdidier T,Denis S.Y precipitate splitting [4]Kim S E,Jackson M P,Reed R C,et al.Quantification of in nickel-based superalloys:a 3-D finite element analysis. the minor precipitates in UDIMET TM alloy720(LI)using Scripta Mater.1996.34(4):601 electrolytic extraction and X-ray diffraction.Mater Sci [15]Banerjee D,Banerjee R,Wang Y.Formation of split pat- EmgA.1998,245(2):225 terns of y precipitates in Ni-Al via particle aggregations. (5]Couturier R,Burlet H,TerziS,et al.Process development Scripta Mater,1999,41(9):1023 and mechanical properties of alloy U720LI for high tem- [16]Zhou L Z,Lupinc V,Guo J T.Evolution of microstruc- perature turbine disks//Superalloys 2004.Warrendale, ture and mechanical property during long-term aging in 2004:351 Udimet 720Li.J Mater Sci Technol,2001,17(6):633 [6]Furrer D U,Fecht F J.Microstructure and mechanical [17]Helm D,Roder O.Influence of long term exposure in air property development in superalloy U720Li//Superalloys on microstructure,surface stability and mechanical prop- 2000.Warrendale,2000:415 erties of UDIMET 720LI//Superalloys 2000.Warren- [7]Keefe P W,Mancuso S O,Maurer G E.Effects of heat dale,2000:487第 6 期 于秋颖等：亚固溶温度热处理对 GH720Li 难变形高温合金 γ 0 相的影响 769 ·· 双时效处理时，部分一次 γ 0 相转变成球形或近球 形，二次 γ 0 相尺寸有所增大，二次和三次 γ 0 相补 充析出的程度更加明显. (3) 870 ℃时效 500 h 时，合金组织变得均匀， 二次和三次 γ 0 相完全回溶，一次 γ 0 相则主要钉扎 于晶界；随着时效时间继续延长，一次 γ 0 相有所粗 化但不明显；GH720Li 合金平均硬度在长期时效过 程中逐渐降低而后基本保持 HB 350 不变. 参 考 文 献 [1] Furrer D U, Fecht F J. γ 0 formation in superalloy U720LI. Scripta Mater, 1999, 40(11): 1215 [2] Jackson M P, Reed R C. Heat treatment of UDIMET 720Li: the effect of microstructure on properties. Mater Sci Eng A, 1999, 259(1): 85 [3] Yu Q Y, Dong J X, Zhang M C, et al. Thermodynamic calculation on equilibrium precipitated phases in GH720Li superalloy. Rare Met Mater Eng, 2010, 39(5): 857 (于秋颖, 董建新, 张麦仓, 等. 难变形高温合金 GH720Li 平衡析出相的热力学计算. 稀有金属材料与工程, 2010, 39(5): 857) [4] Kim S E, Jackson M P, Reed R C, et al. Quantification of the minor precipitates in UDIMET TM alloy720(LI) using electrolytic extraction and X-ray diffraction. Mater Sci Eng A, 1998, 245(2): 225 [5] Couturier R, Burlet H, Terzi S, et al. Process development and mechanical properties of alloy U720LI for high tem￾perature turbine disks // Superalloys 2004. Warrendale, 2004: 351 [6] Furrer D U, Fecht F J. Microstructure and mechanical property development in superalloy U720Li // Superalloys 2000. Warrendale, 2000: 415 [7] Keefe P W, Mancuso S O, Maurer G E. Effects of heat treatment and chemistry on the long-term phase stability of a high strength nickel-based superalloy // Superalloys 1992. Warrendale, 1992: 415 [8] Torster F, Baumeister G, Albrecht J, et al. Influence of grain size and heat treatment on the microstructure and mechanical properties of the nickel-base superalloy U 720 Li. Mater Sci Eng A, 1997, 234-236: 189 [9] Mao J, Chang K M, Yang W, et al. Cooling precipitation and strengthening study in powder metallurgy superalloy U720Li. Metall Trans A, 2001, 32(10): 2441 [10] Radis R, Schaffer M, Albu M, et al. Evolution of size and morphology of γ 0 precipitates in UDIMET 720 LI dur￾ing continuous cooling // Superalloys 2008. Warrendale, 2008: 829 [11] Qiu Y Y. Retarded coarsening phenomenon of γ 0 particles in Ni-based alloy. Acta Mater, 1996, 44(12): 4649 [12] Doi M, Miyazaki T, Wakatsuki T. The effects of elastic in￾teraction energy on the γ 0 precipitate morphology of con￾tinuously cooled nickel-base alloys. Mater Sci Eng, 1985, 74(2): 139 [13] Qiu Y Y. The splitting behavior of γ 0 particles in Ni-based alloys. J Alloys Compd, 1998, 270(1): 145 [14] Hazotte A, Grosdidier T, Denis S. γ 0 precipitate splitting in nickel-based superalloys: a 3-D finite element analysis. Scripta Mater, 1996, 34(4): 601 [15] Banerjee D, Banerjee R, Wang Y. Formation of split pat￾terns of γ 0 precipitates in Ni-Al via particle aggregations. Scripta Mater, 1999, 41(9): 1023 [16] Zhou L Z, Lupinc V, Guo J T. Evolution of microstruc￾ture and mechanical property during long-term aging in Udimet 720Li. J Mater Sci Technol, 2001, 17(6): 633 [17] Helm D, Roder O. Influence of long term exposure in air on microstructure, surface stability and mechanical prop￾erties of UDIMET 720LI // Superalloys 2000. Warren￾dale, 2000: 487