DD5合金单晶双联整铸导向叶片的热工艺匹配性

doi:10.13251/j.issn.0254-6051.2022.06.003

摘要/Abstract

摘要： 研究了DD5合金单晶双联整铸导向叶片热工艺顺序对组织和性能的影响。结果表明,DD5合金标准热处理后,合金组织由碳化物、残留共晶相和规则立方状的γ'相组成。与标准热处理相比,时效前后的焊接,碳化物形貌和数量无明显变化,γ'相和基体通道尺寸呈不均匀分布,γ'相的立方化程度降低,可见锯齿状的γ'/γ相界面,基体通道可见细小不规则的二次γ'相。与时效后进行钎焊工艺相比,时效前进行钎焊工艺的γ'/γ相界面锯齿化程度较轻,γ'相的立方化程度稍好,对合金870 ℃拉伸性能、980 ℃/250 MPa和1093 ℃/158 MPa持久性能没有明显影响。考虑到叶片研制生产工序的安排,建议DD5合金导向叶片先进行标准热处理,再安排焊接工序。

关键词: DD5合金, 导向叶片, 焊接, 组织, 性能

Abstract: Thermal process sequence of single crystal double casting guide vane of DD5 alloy on microstructure and properties was studied. The results show that the microstructure of the DD5 alloy after standard heat treatment is composed of carbides, residual eutectic and regular γ' phase. Compared with that after standard heat treatment, the morphology and size of carbides welded before or after aging have no obvious change, while the size of γ' phase and γ matrix channel are not evenly distributed. The cubic shape degree of γ' phase decreases, the serrated γ'/γ phase interface can be seen, and the fine secondary γ' phase is precipitated in the γ matrix channel. Compared with that welding after aging, when welding before aging, the serrated degree of γ'/γ phase interface is slight and cubic shape degree of γ' phase is better, and the tensile properties at 870 ℃, stress rupture properties at 980 ℃/250 MPa and 1093 ℃/158 MPa are not influenced obviously. Considering the process arrangement of vane production, the optimum process sequence of the DD5 alloy guide vane is standard heat treatment first and then welding.

Key words: DD5 alloy, guide vane, welding, microstructure, property

中图分类号:

TG132.3

贾新云, 陈升平, 宗毳, 谭永宁, 黄朝晖. DD5合金单晶双联整铸导向叶片的热工艺匹配性[J]. 金属热处理, 2022, 47(6): 13-18.

Jia Xinyun, Chen Shengping, Zong Cui, Tan Yongning, Huang Zhaohui. Thermal process matching of single crystal double casting guide vane of DD5 alloy[J]. Heat Treatment of Metals, 2022, 47(6): 13-18.

参考文献

[1]Caron P, Khan T. Evolution of Ni-based superalloys for single crystal gas turbine blade applications[J]. Aerospace Science Technology, 1999, 3: 513-523.
[2]Walston S, Cetel A, Mackay R, et al. Joint development of a fourth generation single crystal superalloy[C]//Superalloys. Pennsylvania, PA: TMS, 2004: 15-24.
[3]Shi Z X, Li J R, Liu S Z. Effect of long term aging on microstructure and stress rupture properties of a nickel based single crystal superalloy[J]. Progress in Natural Science: Materials International, 2012, 22(5): 426-433.
[4]Hegdea S R, Kearseyb R M, Beddoesa J C. Designing homogenization solution heat treatments for single crystal superalloys[J]. Materials Science and Engineering A, 2010, 527: 5528-5538.
[5]Li P, Li S S, Han Y F. Influence of solution heat treatment on microstructure and stress rupture properties of a Ni₃Al base single crystal superalloy IC6SX[J]. Intermetallics, 2011, 19: 182-186.
[6]白雪峰, 任英磊, 王文珍, 等. 热处理对含铼镍基单晶高温合金显微组织的影响[J]. 铸造, 2006, 55(2): 619-622.
Bai Xuefeng, Ren Yinglei, Wang Wenzhen, et al. The influence of heat treatment on the microstructures of a single crystal nickel-base superalloy[J]. Foundry, 2006, 55(2): 619-622.
[7]Yu J J, Sun X F, Zhao N R, et al. Effect of heat treatment on microstructure and stress rupture life of DD32 single crystal Ni-base superalloy[J]. Materials Science and Engineering A, 2007, 460-461: 420-427.
[8]Fuchs G E. Improvement of creep strength of a third generation, single-crystal Ni-base superalloy by solution heat treatment[J]. Journal of Materials Engineering and Performance, 2002, 11: 19-25.
[9]Wang J, Zhang L T, Chen K, et al. Morphology and chemical composition of γ'/γ phases in Re-containing Ni-based single crystal superalloy during two-step aging[J]. Transaction Nonferrous Metal Society of China, 2010, 21: 1513-1517.
[10]Wang W Z, Jin T, Zhao N R, et al. Effect of cobalt on chemical segregation and solution process in Re-containing single crystal superalloys[J]. Transaction Nonferrous Metal Society of China, 2006, 16(S): 1978-1981.
[11]陈柏凡, 李辉. 一种第二代镍基单晶高温合金固溶时效处理工艺的确定[J]. 机械工程材料, 2013, 37(5): 18-22.
Chen Baifan, Li Hui. Determination of solid solution and aging process for a second generation Ni-based single crystal superalloy[J]. Materials for Mechanical Engineering, 2013, 37(5): 18-22.
[12]韩凤奎, 燕平, 赵京晨. 时效热处理对镍基单晶高温合金组织的影响[J]. 钢铁研究学报, 2008, 20(2): 44-48.
Han Fengkui, Yan Ping, Zhao Jingchen. Influence of aging treatment on structure of single crystal nickel base superalloy[J]. Journal of Iron and Steel Research, 2008, 20(2): 44-48.
[13]史振学, 刘世忠, 李嘉荣. 一次时效温度对单晶高温合金组织和持久性能的影响[J]. 材料热处理学报, 2014, 35(S2): 55-60.
Shi Zhenxue, Liu Shizhong, Li Jiarong. Effect of primary aging temperature on microstructure and stress rupture properties of single crystal superalloy[J]. Transactions of Materials and Heat Treatment, 2014, 35(S2): 55-60.
[14]任英磊, 金涛, 管恒荣, 等. 热处理制度对一种单晶镍基高温合金γ'相形貌演化的影响[J]. 机械工程材料, 2001, 25(4): 7-10.
Ren Yinglei, Jin Tao, Guan Hengrong, et al. Heat treatment on the evolution of γ' morphology of a single crystal nickel-base superalloy[J]. Materials for Mechanical Engineering, 2001, 25(4): 7-10.
[15]王志辉, 赵乃仁, 李金国, 等. 热处理工艺对SRR99镍基单晶高温合金组织和性能的影响[J]. 材料工程, 2008(12): 46-50.
Wang Zhihui, Zhao Nairen, Li Jinguo, et al. Effects of heat treatment on microstructures and stress rupture properties in SRR99 Ni-base single crystal superalloy[J]. Journal of Materials Engineering, 2008(12): 46-50.
[16]Murakumo T, Kobayashi T, Koizumi Y, et al. Creep behavior of Ni-base single crystal superalloys with various γ' volume fraction[J]. Acta Materialia, 2004, 52(12): 3737-3744.
[17]史振学, 刘世忠, 熊继春, 等. 不同使用温度下DD6单晶高温合金的组织演变行为[J]. 中国有色金属学报, 2015, 25(11): 3077-3083.
Shi Zhenxue, Liu Shizhong, Xiong Jichun, et al. Microstructure evolution behavior of DD6 single crystal superalloy at different using temperatures[J]. The Chinese Journal of Nonferrous Metals, 2015, 25(11): 3077-3083.
[18]赵坦. 第二代定向柱晶高温合金DZ59研究[D]. 南京: 南京理工大学, 2009.
Zhao Tan. Study on 2^nd generation direction alloy solidified superalloy DZ59[D]. Nanjing: Nanjing University of Technology, 2009.
[19]刘丽荣, 金涛, 赵乃仁, 等. 热处理对一种镍基单晶高温合金微观组织和和持久性能的影响[J]. 稀有金属材料与工程, 2006, 35(5): 711-714.
Liu Lirong, Jin Tao, Zhao Nairen, et al. Effects of heat treatment on the microstructures and stress rupture properties in a Ni-base single crystal superalloy[J]. Rare Metal Materials and Engineering, 2006, 35(5): 711-714.
[20]Miyazaki T, Koyama T, Doi M. Effect of coherent strain energy on γ'/γ phase in Ni-Al-Ti alloys[J]. Acta Metallurgical Material, 1994, 42(10): 3417-3424.