镍基高温合金GH3536箔材高温氧化与组织演变行为
High-temperature oxidation and microstructure evolution behavior of Ni-based superalloy GH3536 foil
田伟 1王永钢 2安宁 3杨勇 2刘砚飞 1李晗 2李海山2
作者信息
- 1. 中国航发四川燃气涡轮研究院,成都 610500
- 2. 河北工业大学 材料科学与工程学院,天津 300401
- 3. 北京北冶功能材料有限公司,北京 100192
- 折叠
摘要
本文研究了镍基高温合金GH3536箔材在400、600、800℃处理100、300、500 h的氧化行为与组织变化.采用光学显微镜、X射线衍射、扫描电子显微镜、能谱及显微硬度计分析了箔材的氧化表面形貌、物相、微观组织以及显微硬度.结果表明:箔材氧化遵循抛物线规律,氧化层以Cr2O3为主,随氧化程度的加重,氧化层表面出现了尖晶石氧化物;箔材经过不同温度氧化处理后,内部析出相的种类与形态差异显著,主要析出相为M23C6、M6C、σ、µ,且在800℃处理时,氧化层形成与析出相析出两者间出现耦合现象,导致晶界µ相的析出位置逐渐移向箔材中部.
Abstract
In this paper,the oxidation behavior and microstructure evolution of Ni-based superalloy GH3536 foil heat-treated at 400,600 and 800℃for 100,300 and 500 h were studied.X-ray diffraction,scanning electron microscopy,energy spectroscopy and microhardness tester were used to analyze the oxidized surface morphology,oxidation products,microstructure and microhardness of the foil.The results show that the oxidation of the foil follows the parabolic law,and the oxide layer is mainly composed of Cr2O3.With the increase of oxidation degree,spinel oxide appears on the surface of the oxide layer.The types and morphologies of the internal precipitated phases exhibit significant variations following oxidation at different temperatures.The main precipitated phases are M23C6,M6C,σ,and µ.When treated at 800℃,the formation of the oxide layer and the precipitation of the precipitated phase produce a coupling phenomenon,resulting in the precipitation position of the μ phase on the grain boundary gradually shifting to the middle of the foil.
关键词
GH3536箔材/长期高温氧化/氧化形貌/析出相Key words
GH3536 foil/long-term high-temperature oxidation/oxidation morphology/precipitated phase引用本文复制引用
出版年
2024
NETL
NSTL
万方数据