850 ℃涡轮盘用新型变形高温合金GH4975挤压棒材热变形规律研究
收稿日期: 2020-03-04
修回日期: 2020-04-06
网络出版日期: 2020-06-17
基金资助
预研基金项目(9140C4302XX)
Hot Deformation Characteristics of Novel Wrought Superalloy GH4975 Extruded Rod Used for 850 ℃ Turbine Disc
Received date: 2020-03-04
Revised date: 2020-04-06
Online published: 2020-06-17
Supported by
Preparatory Studies Fund Project(9140C4302XX)
采用真空感应熔炼+真空自耗重熔工艺制备铸锭，通过挤压开坯方法制备出了GH4975合金细晶棒材。利用Gleeble 1500热模拟试验机研究了GH4975合金在变形温度为1070~1220 ℃、应变速率为0.001~1 s-1条件下的热变形行为。结果表明，GH4975合金的应力-应变曲线具有典型的动态再结晶特征，存在应变硬化、流变软化和稳态流变3个阶段。基于GH4975合金挤压棒材的应力-应变曲线，建立了热变形参数本构方程，其热变形激活能(Q)为664587 J/mol；根据动态材料模型，构建了合金挤压棒材的热加工图，结合微观组织分析，确定了合金合适的热加工工艺范围。GH4975合金在1100~1130 ℃温度条件下易发生动态再结晶，其再结晶机制为应变诱导晶界形核。
张勇 , 李鑫旭 , 韦康 , 万志鹏 , 贾崇林 , 王涛 , 李钊 , 孙宇 , 梁红艳 . 850 ℃涡轮盘用新型变形高温合金GH4975挤压棒材热变形规律研究[J]. 金属学报, 2020 , 56(10) : 1401 -1410 . DOI: 10.11900/0412.1961.2020.00074
With the development of aero-engine in the direction of high thrust ratio, high efficiency and high reliability, the indicators of temperature resistance of cast & wrought superalloys are getting higher and higher. For the demand of aero-engine, the wrought superalloy materials used for aero engine turbine disc have been made remarkable progress. Form heat-resistant steel which temperature capability reaches 550 ℃ to iron-nickel based superalloy used at 650 ℃, and the high alloyed wrought superalloy with service temperature of 750 ℃ have been developed. The nickel-based wrought superalloy GH4975 is a high strength, complex alloying, hard-deformed wrought turbine disc alloy, which can be used at 850 ℃. In the study, the thermal deformation behavior of GH4975 extruded rod prepared by vacuum induction melting (VIM) and vacuum arc remelting (VAR) was studied by thermal simulation machine with the temperature range of 1070~1220 ℃ and strain rate range of 0.001~1 s-1. The results show that the stress-strain curves of GH4975 alloy are divided into three stages: strain hardening, flow softening and steady state rheology, exhibiting typical dynamic recrystallization characteristics. The constitutive equation of GH4975 extruded rod was established and the hot deformation activation energy was calculated as 664587 J/mol. Besides, the processing maps of GH4975 alloy were drawn based on the dynamic material model (DMM), and the suitable processing parameters are determined by combining with microstructure observation. The dynamic recrystallization easily occurs at the deformation temperature range of 1100~1130 ℃, and the nucleation mechanisms were elaborated to be strain inducing grain boundary.
| [1] | Tian S F, Zhang G Q, Li Z, et al. The disk superalloys and disk manufacturing technologies for advanced aero engine [J]. J. Aeronaut. Mater., 2003, 23(suppl.1): 233 |
| [1] | (田世藩, 张国庆, 李 周等. 先进航空发动机涡轮盘合金及涡轮盘制造 [J]. 航空材料学报, 2003, 23(): 233) |
| [2] | Liu Y C, Zhang H J, Guo Q Y, et al. Microstructure evolution of Inconel 718 superalloy during hot working and its recent development tendency [J]. Acta Metall. Sin., 2018, 54: 1653 |
| [2] | (刘永长, 张宏军, 郭倩颖等. Inconel 718变形高温合金热加工组织演变与发展趋势 [J]. 金属学报, 2018, 54: 1653) |
| [3] | Wang H P, Lü P, Cai X, et al. Rapid solidification kinetics and mechanical property characteristics of Ni-Zr eutectic alloys processed under electromagnetic levitation state [J]. Mater. Sci. Eng., 2020, A772: 138660 |
| [4] | Huang Q Y, Li H K. Superalloys [M]. Beijing: Metallurgical Industry Press, 2000: 4 |
| [4] | (黄乾尧, 李汉康. 高温合金 [M]. 北京: 冶金工业出版社, 2000: 4) |
| [5] | Luo J T, Yu W L, Xi C Y, et al. Preparation of ultrafine-grained GH4169 superalloy by high-pressure torsion and analysis of grain refinement mechanism [J]. J. Alloys Compd., 2019, 777: 157 |
| [6] | Liu Y C, Guo Q Y, Li C, et al. Recent progress on evolution of precipitates in Inconel 718 superalloy [J]. Acta Metall. Sin., 2016, 52: 1259 |
| [6] | (刘永长, 郭倩颖, 李 冲等. Inconel 718高温合金中析出相演变研究进展 [J]. 金属学报, 2016, 52: 1259) |
| [7] | Zhang X, Li H W, Zhan M, et al. Electron force-induced dislocations annihilation and regeneration of a superalloy through electrical in-situ transmission electron microscopy observations [J]. J. Mater. Sci. Technol., 2020, 36: 79 |
| [8] | Zhang H J, Li C, Liu Y C, et al. Effect of hot deformation on γ" and δ phase precipitation of Inconel 718 alloy during deformation & isothermal treatment [J]. J. Alloys Compd., 2017, 716: 65 |
| [9] | Kennedy R L. Allvac? 718PlusTM, superalloy for the next forty years [A]. Superalloys 718, 625, 706 and Derivatives 2005 [C]. Pittsburgh: TMS, 2005: 1 |
| [10] | Cao W D, Kennedy R. Role of chemistry in 718-type alloys-Allvac? 718PlusTM alloy development [A]. Superalloys 2004 [C]. Pittsburgh: TMS, 2004: 91 |
| [11] | Heaney J A, Lasonde M L, Powell A M, et al. Development of a new cast and wrought alloy (René 65) for high temperature disk applications [A]. Proceedings of the 8th International Symposium on Superalloy 718 and Derivatives [C]. New York: John Wiley & Sons, 2014: 67 |
| [12] | Devaux A, Picqué B, Gervais M F, et al. AD730TM—A new nickel-based superalloy for high temperature engine rotative parts [A]. Superalloys 2012 [C]. Pennsylvania: TMS, 2012: 911 |
| [13] | Gu Y F, Cui C Y, Yuan Y, et al. Research progress in a high performance cast & wrought superalloy for turbine disc applications [J]. Acta Metall. Sin., 2015, 51: 1191 |
| [13] | (谷月峰, 崔传勇, 袁 勇等. 一种高性能航空涡轮盘用铸锻合金的研究进展 [J]. 金属学报, 2015, 51: 1191) |
| [14] | Bi Z N, Qin H L, Dong Z G, et al. Residual stress evolution and its mechanism during the manufacture of superalloy disk forgings [J]. Acta Metall. Sin., 2019, 55: 1160 |
| [14] | (毕中南, 秦海龙, 董志国等. 高温合金盘锻件制备过程残余应力的演化规律及机制 [J]. 金属学报, 2019, 55: 1160) |
| [15] | Wang Z X, Huang S, Zhang B J, et al. Study on freckle of a high-alloyed GH4065 nickel base wrought superalloy [J]. Acta Metall. Sin., 2019, 55: 417 |
| [15] | (王资兴, 黄 烁, 张北江等. 高合金化GH4065镍基变形高温合金点状偏析研究 [J]. 金属学报, 2019, 55: 417) |
| [16] | Du J H, Zhao G P, Deng Q, et al. Development of wrought superalloy in China [J]. J. Aeronaut. Mater. 2016, 36(3): 27 |
| [16] | (杜金辉, 赵光普, 邓 群等. 中国变形高温合金研制进展 [J]. 航空材料学报, 2016, 36(3): 27) |
| [17] | Fu R, Chen X C, Ren H, et al. Structure and hot deformation behavior of ESR-CDS René88DT [J]. J. Aeronaut. Mater., 2011, 31(3): 8 |
| [17] | (付 锐, 陈希春, 任 昊等. 电渣重熔连续定向凝固René88DT合金的组织与热变形行为 [J]. 航空材料学报, 2011, 31(3): 8) |
| [18] | Zhou Y H, Liu Y C, Zhou X S, et al. Precipitation and hot deformation behavior of austenitic heat-resistant steels: A review [J]. J. Mater. Sci. Technol., 2017, 33: 1448 |
| [19] | Sellars C M, McTegart W J. On the mechanism of hot deformation [J]. Acta Metall., 1996, 14: 1136 |
| [20] | Zhang H J, Li C, Liu Y C, et al. Precipitation behavior during high-temperature isothermal compressive deformation of Inconel 718 alloy [J]. Mater. Sci. Eng., 2016, A677: 515 |
| [21] | Wen D X, Lin Y C, Li X H, et al. Hot deformation characteristics and dislocation substructure evolution of a nickel-base alloy considering effects of δ phase [J]. J. Alloys Compd., 2018, 764: 1008 |
| [22] | Wu Y T, Liu Y C, Li C, et al. Deformation behavior and processing maps of Ni3Al-based superalloy during isothermal hot compression [J]. J. Alloys Compd., 2017, 712: 687 |
| [23] | Prasad Y V R K, Sasidhara S. Hot Working Guide: A Compendium of Processing Maps [M]. Materials Park, OH: ASM International, 1997: 1224 |
| [24] | Monajati H, Taheri A K, Jahazi M, et al. Deformation characteristics of isothermally forged UDIMET 720 nickel-base superalloy [J]. Metall. Mater. Trans., 2005, 36A: 895 |
| [25] | Wu J, Liu Y C, Li C, et al. Recent progress of microstructure evolution and performance of multiphase Ni3Al-based intermetallic alloy with high Fe and Cr contents [J]. Acta Metall. Sin., 2020, 56: 21 |
| [25] | (吴 静, 刘永长, 李 冲等. 高Fe、Cr含量多相Ni3Al基高温合金组织与性能研究进展 [J]. 金属学报, 2020, 56: 21) |
| [26] | Lin Y C, Huang J, He D G, et al. Phase transformation and dynamic recrystallization behaviors in a Ti55511 titanium alloy during hot compression [J]. J. Alloys Compd., 2019, 795: 471 |
| [27] | Wang X G, Han G M, Cui C Y, et al. On the γ′ precipitates of the normal and inverse Portevin-Le Chatelier effect in a wrought Ni-base superalloy [J]. J. Mater. Sci. Technol., 2019, 35: 84 |
| [28] | Chen M S, Zou Z H, Lin Y C, et al. Formation mechanism of large grains inside annealed microstructure of GH4169 superalloy by cellular automation method [J]. J. Mater. Sci. Technol., 2019, 35: 1403 |
| [29] | Wu J, Li C, Liu Y C, et al. Effect of annealing treatment on microstructure evolution and creep behavior of a multiphase Ni3Al-based superalloy [J]. Mater. Sci. Eng., 2019, A743: 623 |
| [30] | Popov A A. Effect of electronic nature and substitution behavior of ternary microadditions on the ductility of polycrystalline nickel aluminides [J]. Acta Mater., 1997, 45: 1613 |
| [31] | Wu Y T, Liu Y C, Li C, et al. Coarsening behavior of γ′ precipitates in the γ'+γ area of a Ni3Al-based alloy [J]. J. Alloys Compd., 2019, 771: 526 |
| [32] | Dai L, Liu Z, Yu L M, et al. Microstructural characterization of Mg-Al-O rich nanophase strengthened Fe-Cr alloys [J]. Mater. Sci. Eng., 2020, A771: 138664 |
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