Abstract: Due to the excellent high-temperature mechanical performance, nickel-based single-crystal superalloys have developed indispensable mate-rials in the preparation of advanced aero-engines. The high rate solidification (HRS) method is a Bridgman directional solidification technology, which moves the mold filled with molten metal out of the heating zone for cooling. Because of its simple equipment and stable solidification structure, it has been the most common technology for the preparation of aero-engine blades. However, in the process of preparing large-sized single-crystal superalloy turbine blades, the low thermal gradient of HRS method restricts the increasing of withdrawal rate, which leads to increase the tendency of defects formation, resulting in low yield of the blades. The lower withdrawal rate would also increase the production cycle and energy consumption. The gas cooling casting (GCC) method and liquid metal cooling (LMC) method developed later also have many problems, such as high cost, pollution of Sn, and the difficulties in equipment maintenance. Therefore, it is necessary to develop advanced directional solidification technology with high thermal gradient, clean cooling medium, simple equipment structure, and low cost. The fluidized bed quenching (FBQ) method is a Bridgman directional solidification technology that uses solid particles and inert gas for cooling. The FBQ method can provide a higher thermal gradient due to the excellent cooling capacity and the existence of a dynamic baffle. The dynamic baffle effectively prevents heat transfer from the hot zone to the cold zone. Additionally, the fluidized bed does not contaminate the castings and it has the advantages of simple structure, low cost, short production cycle, and easy maintenance. Therefore, the FBQ method has a good application prospect in the process of large-sized nickel-based single-crystal superalloy turbine blades. In this paper, the principles and characteristics of fluidized bed quenching are clarified, the structure of directional solidification technology with fluidized bed quenching are introduced, the research progress of dynamic baffles in directional solidification equipment with fluidized bed quen-ching are summarized, the influencing factors of the fluidized bed quenching capacity are analyzed, such as gas velocity and particle size, and the future research aspects of directional solidification technology with fluidized bed quenching are also prospected.
1 Reed R C.The superalloys fundamentals and applications, Cambridge University Press, UK, 2006. pp.19. 2 Ma D X.Acta Metallurgica Sinica, 2015, 51(10), 1179(in Chinese). 马德新. 金属学报, 2015, 51(10), 1179. 3 Luo L, Xiao C B, Chen J Y, et al. Journal of Materials Engineering, 2019, 47(6), 34(in Chinese). 罗亮,肖程波,陈晶阳,等.材料工程,2019,47(6),34. 4 Zhang J, Lou L H, Li H.Materials China, 2013,32(1),12(in Chinese). 张健,楼琅洪,李辉.中国材料进展, 2013,32(1),12. 5 Liu L, Zhang J, Shen J, et al.Materials China, 2010, 29(7), 1(in Chinese). 刘林, 张军, 沈军,等.中国材料进展, 2010, 29(7), 1. 6 Bridgman P W. US patent, US1793672, 1931. 7 Brundidge C L, Vandrasek D, Wang B, et al.Metallurgical and Mate-rials Transactions A, 2012, 43(3), 965. 8 Erickson J S, Owczarski W A, Curran P M.Metal Progress, 1971, 99(3), 58. 9 Brundidge C L, Miller J D, Pollock T M. Metallurgical and Materials Transactions A, 2011, 42(9), 2723. 10 Miller J D, Yuan L, Lee P D, et al. Acta Materialia, 2014, 69, 47. 11 Miller J D, Pollock T M. Acta Materialia, 2014, 78, 23. 12 Li Y F. Study on stray grain formation in the platform of Ni-based single crystal superalloys turbine blade. Ph.D. Thesis, North Western Ploytechnical University, China, 2018(in Chinese). 李亚峰.镍基单晶高温合金涡轮叶片平台杂晶缺陷研究. 博士学位论文,西北工业大学,2018. 13 Kates E L, Konter M, Roesler J. US patent, US5921310, 1999. 14 Giamei A F, Tschinkel J G. Metallurgical Transactions A, 1976, 7(9), 1427. 15 Elliott A J, Tin S, King W T, et al. Metallurgical and Materials Transactions A, 2004, 35(10), 3221. 16 Shen J, Xu Z G, Lu Y Z, et al. Metallurgical and Materials Transactions A, 2018, 49(9), 4003. 17 Zhang J, Wang L, Wang D, et al. Acta Metallurgica Sinica, 2019,55(9), 1077(in Chinese). 张健,王莉,王栋,等.金属学报, 2019,55(9), 1077. 18 Nakagawa Y G, Murakami K, Ohotomo A, et al. Transactions of the Iron and Steel Institute of Japan, 1980, 20(9), 614. 19 Su L S, Zhu Q Q, Liu B C, et al. Chemical Industry and Engineering Progress, 2017, 36(9), 3177(in Chinese). 苏鲁书,朱晴晴,刘丙超,等.化工进展, 2017, 36(9), 3177. 20 Li Y, Zheng P J, Zhang J B, et al. Materials Reports A:Review Papers, 2014, 28(12), 108(in Chinese). 李勇,郑碰菊,张建波,等.材料导报:综述篇, 2014,28(12), 108. 21 Liu A Y. Discrete particle simulation of hydrodynamics, heat transfer and combustion in fluidized bed. Ph.D. Thesis, Institute of Engineering Thermophsics Chinese Academy of Science, 2002(in Chinese). 刘安源.流化床内流动、传热及燃烧特性的离散颗粒模拟. 博士学位论文,中国科学院工程热物理研究所,2002. 22 Quested P N, Northwood J E. US patent, US4573516, 1986. 23 Zhang F S, Shen J, He Y H, et al. Materials Science ＆ Technology, 2007(4), 445(in Chinese). 张丰收,沈军,贺跃辉,等.材料科学与工艺, 2007(4), 445. 24 Graham L D. US patent, US6035924, 2000. 25 Graham L D. US patent, US2004173336, 2004. 26 Hofmeister M, Wirth K E, Singer R F. EU patent, DE102014208922, 2014. 27 Hofmeister M, Singer R F. EU patent, DE102014216766, 2016. 28 Hofmeister M, Franke M M, Koerner C, et al. Metallurgical and Mate-rials Transactions B, 2017, 48(6), 3132. 29 Liu L, Huang T W, Qu M, et al. Journal of Materials Processing Technology, 2010, 210(1), 159. 30 Liu L, Sun D J, Huang T W, et al. Acta Metallurgica Sinica, 2018, 54(5), 615(in Chinese). 刘林, 孙德建, 黄太文,等. 金属学报, 2018, 54(5),615. 31 Franke M M, Hilbinger R M, Lohmueller A, et al. Journal of Materials Processing Technology, 2013, 213(12), 2081. 32 Rees A C, Davidson J F, Dennis J S, et al. Chemical Engineering Science, 2005, 60(4), 1143. 33 Graham L D, Rauguth B L. EU patent, EP1153681, 2001. 34 Zhang F S. Study on soft-contact electromagnetlc shaping and directional solidfication of special alloys. Ph.D. Thesis, North Western Ploytechnical University, China, 2003(in Chinese). 张丰收.特种合金软接触电磁成形定向凝固技术研究. 博士学位论文,西北工业大学,2003. 35 Reynoldson R, Huynh L M. International Journal of Materials and Pro-duct Technology, 2005, 24(1-4), 397. 36 Barley R W.Minerals Engineering, 1993, 6(7), 804. 37 Reynoldson R W.Heat treatment in fluidized beds, ASM Intl, US, 1993, pp.7.
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2022, Vol. 36 
