热校形工艺对Ni3Al基高温合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2025.09.006

金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 34-38.DOI: 10.13251/j.issn.0254-6051.2025.09.006

热校形工艺对Ni₃Al基高温合金组织与性能的影响

吴保平¹, 付媛媛¹, 张绪亮¹, 孙长波², 杨草³, 王凯¹, 吴剑涛¹

1.河北钢研德凯科技有限公司, 河北涿州 072750;
2.中国航发沈阳黎明航空发动机有限责任公司, 辽宁沈阳 110043;
3.中国航发贵州黎阳航空动力有限公司, 贵州贵阳 550014

收稿日期:2025-05-29 修回日期:2025-08-02 出版日期:2025-09-25 发布日期:2025-10-13
作者简介:吴保平(1986—),男,副高级工程师,博士,主要研究方向为高温合金,E-mail:wbp0104@163.com。
基金资助:
中央企业自主投入研发专项基金(事23T60180B)

Effect of thermal straightening process on microstructure and properties of Ni₃Al-based superalloy

Wu Baoping¹, Fu Yuanyuan¹, Zhang Xuliang¹, Sun Changbo², Yang Cao³, Wang Kai¹, Wu Jiantao¹

1. Dekai Intelligent Casting Co., Ltd., Zhuozhou Hebei 072750, China;
2. AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang Liaoning 110043, China;
3. AECC Guizhou Liyang Aviation Power Co., Ltd., Guiyang Guizhou 550014, China

Received:2025-05-29 Revised:2025-08-02 Online:2025-09-25 Published:2025-10-13

摘要/Abstract

摘要： 研究了不同温度(1140、1160、1180和1200 ℃)和时间(2和4 h)热校形对Ni₃Al基高温合金组织与性能的影响,通过JmatPro热力学软件计算不同温度下合金平衡相析出含量,采用扫描电镜(SEM)分析不同热校形温度和保温时间对合金中一次γ′相溶解程度及二次γ′相析出程度的影响,进而分析其对合金高温拉伸和高温持久性能的影响规律。结果表明:随着热校形温度的升高,合金中的一次粗大γ′相逐渐溶解,并在冷却的过程中逐渐析出二次细小均匀的γ′相。随着热校形保温时间的增加,二次细小γ′相析出越来越多。二次细小γ′相的含量直接影响合金的1100 ℃拉伸性能和1100 ℃/60 MPa条件下的持久性能。建议合金的热校形工艺为1160~1200 ℃,保温4 h,此时合金的性能达到最佳。

关键词: 高温合金, 热校形, 显微组织, 析出相

Abstract: Effects of thermal straightening temperature (1140, 1160, 1180 and 1200 ℃) and holding time (2 h and 4 h) on microstructure and properties of Ni₃Al-based superalloy were studied. The equilibrium phase precipitation content of the alloy at different temperatures was calculated by using JmatPro thermodynamic software. The effects of thermal straightening temperatures and holding time on the dissolution degree of the primary γ′ phase and the precipitation degree of the secondary γ′ phase were analyzed by using scanning electron microscopy (SEM), as well as the influence of which on the high-temperature tensile properties and high-temperature rupture properties of the alloy. The results show that as the thermal straightening temperature increases, the coarsed primary γ′ phase in the alloy gradually dissolves, and the fine and uniform secondary γ′ phase gradually precipitates during the cooling process. As the holding time increases, more and more secondary fine γ′ phases precipitate. The content of fine secondary γ′ phase directly affects the alloýs tensile properties at 1100 ℃ and creep rupture properties at 1100 ℃/60 MPa. It is recommended that the alloýs thermal straightening process is 1160-1200 ℃, and the holding temperature is 4 h, so that the performance of the alloy is the best.

Key words: superalloy, thermal straightening process, microstructure, precipitated phase

中图分类号:

TG24

吴保平, 付媛媛, 张绪亮, 孙长波, 杨草, 王凯, 吴剑涛. 热校形工艺对Ni₃Al基高温合金组织与性能的影响[J]. 金属热处理, 2025, 50(9): 34-38.

Wu Baoping, Fu Yuanyuan, Zhang Xuliang, Sun Changbo, Yang Cao, Wang Kai, Wu Jiantao. Effect of thermal straightening process on microstructure and properties of Ni₃Al-based superalloy[J]. Heat Treatment of Metals, 2025, 50(9): 34-38.

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热校形工艺对Ni₃Al基高温合金组织与性能的影响

Effect of thermal straightening process on microstructure and properties of Ni₃Al-based superalloy

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