斜坡固溶处理对镍基单晶高温合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2025.08.026

金属热处理 ›› 2025, Vol. 50 ›› Issue (8): 162-168.DOI: 10.13251/j.issn.0254-6051.2025.08.026

斜坡固溶处理对镍基单晶高温合金组织与性能的影响

汤耀景¹, 潘福荣¹, 郑杨¹, 王林海¹, 王宝旦¹, 鲍臣鹏¹, 徐彬¹, 岳亮²

1.国网浙江省电力有限公司温州供电公司, 浙江温州 325000;
2.浙江省科创新材料研究院, 浙江杭州 311500

收稿日期:2025-02-20 修回日期:2025-05-29 出版日期:2025-08-25 发布日期:2025-09-10
通讯作者: 岳亮,工程师,硕士,E-mail:yueliangv5@163.com
作者简介:汤耀景(1986—),男,高级工程师,硕士,主要研究方向为热处理工艺对高温合金组织与性能的影响,E-mail:515881019@qq.com。
基金资助:
国网浙江省电力有限公司科技项目(5211WZ230005)

Effect of ramp solution treatment on microstructure and mechanical properties of nickel-based single crystal superalloy

Tang Yaojing¹, Pan Furong¹, Zheng Yang¹, Wang Linhai¹, Wang Baodan¹, Bao Chenpeng¹, Xu Bin¹, Yue Liang²

1. State Grid Wenzhou Electric Power Supply Company, Wenzhou Zhejiang 325000, China;
2. Zhejiang Institute of Advanced Material Science and Innovation, Hangzhou Zhejiang 311500, China

Received:2025-02-20 Revised:2025-05-29 Online:2025-08-25 Published:2025-09-10

摘要/Abstract

摘要： 对某镍基单晶高温合金进行1340~1365 ℃保温30 min的固溶处理,利用金相法确定了该合金的初熔温度,随后对其进行不同温度的斜坡固溶+时效处理,研究了斜坡固溶对其组织与性能的影响。结果表明,试验合金的初熔温度为1355~1360 ℃。采用斜坡固溶处理,可提高合金的初熔温度点,当斜坡固溶温度达到1360 ℃时,合金未发生初熔。随斜坡固溶温度的升高,元素偏析程度逐步下降,特别是Re元素的偏析显著降低;合金的γ'相尺寸均匀性、立方度逐渐升高。1360 ℃×10 h斜坡固溶+时效处理试样在1100 ℃/137 MPa下的蠕变寿命达到500 h以上,大幅超过同等第四代镍基单晶高温合金400 h的要求。

关键词: 镍基单晶高温合金, 斜坡固溶处理, γ'相, 枝晶偏析

Abstract: A nickel-based single crystal superalloy was solution treated at 1340-1365 ℃ for 30 min, and the initial melting temperature of the alloy was determined by metallographic method. Subsequently, ramp solution treatment at different temperatures plus aging was carried out to investigate the effect of ramp solution treatment on its microstructure and properties. The results show that the initial melting temperature of the alloy is 1355-1360 ℃. The ramp solution treatment can increase the initial melting temperature of the alloy, and the alloy does not undergo initial melting when the ramp solution temperature reaches 1360 ℃. With the increase of ramp solution temperature, the degree of element segregation gradually decreases, especially the segregation of Re element is significantly reduced, and the size uniformity and cubicity of γ' phase in the alloy gradually increase. The creep life under the condition of 1100 ℃/137 MPa of the alloy exceeds 500 h after treated by ramp solution treatment at 1360 ℃ for 10 h followed by aging treatment, which significantly exceeds the requirement of 400 h for the equivalent fourth-generation nickel-based single-crystal superalloy.

Key words: nickel-based single crystal superalloy, ramp solution treatment, γ' phase, dendritic segregation

中图分类号:

TG132.3

汤耀景, 潘福荣, 郑杨, 王林海, 王宝旦, 鲍臣鹏, 徐彬, 岳亮. 斜坡固溶处理对镍基单晶高温合金组织与性能的影响[J]. 金属热处理, 2025, 50(8): 162-168.

Tang Yaojing, Pan Furong, Zheng Yang, Wang Linhai, Wang Baodan, Bao Chenpeng, Xu Bin, Yue Liang. Effect of ramp solution treatment on microstructure and mechanical properties of nickel-based single crystal superalloy[J]. Heat Treatment of Metals, 2025, 50(8): 162-168.

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斜坡固溶处理对镍基单晶高温合金组织与性能的影响

Effect of ramp solution treatment on microstructure and mechanical properties of nickel-based single crystal superalloy

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