某燃气轮机燃烧室合金高温蒸汽氧化行为研究

doi:10.11902/1005.4537.2023.105

中国腐蚀与防护学报

2024, Vol. 44

Issue (2): 355-364 CSTR: 32134.14.1005.4537.2023.105 DOI: 10.11902/1005.4537.2023.105

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某燃气轮机燃烧室合金高温蒸汽氧化行为研究

梁志远¹(

), 张超², 曲劲宇², 何建元², 郭亭山¹, 徐一鸣¹

^1.西安交通大学能源与动力工程学院西安 710049
^2.中国船舶集团有限公司第七〇三研究所船舶与海洋特种装备和动力系统国家工程研究中心哈尔滨 150078

Oxidation Behavior in Air-steam Mixed Atmosphere at 1000^oC of Four Typical High-temperature Alloys for Gas Turbine

LIANG Zhiyuan¹(

), ZHANG Chao², QU Jinyu², HE Jianyuan², GUO Tingshan¹, XU Yiming¹

^1.School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
^2.National Engineering Research Center for Ship and Marine Special Equipment and Power Systems, No. 703 Research Institute of CSSC, Harbin 150078, China

引用本文:

梁志远, 张超, 曲劲宇, 何建元, 郭亭山, 徐一鸣. 某燃气轮机燃烧室合金高温蒸汽氧化行为研究[J]. 中国腐蚀与防护学报, 2024, 44(2): 355-364.
Zhiyuan LIANG, Chao ZHANG, Jinyu QU, Jianyuan HE, Tingshan GUO, Yiming XU. Oxidation Behavior in Air-steam Mixed Atmosphere at 1000^oC of Four Typical High-temperature Alloys for Gas Turbine[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(2): 355-364.

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摘要:

采用蒸汽氧化实验与热力学理论计算研究了DD5，K447A，GH3230以及GH3536共计4种燃气轮机用典型高温合金在高温蒸汽中的氧化行为。在1000℃下含10%H₂O的空气中，合金GH3230和K447A氧化增重遵循抛物线氧化规律，合金DD5和GH3536出现失重情况。合金K447A与GH3230表面形成了Cr₂O₃和Al₂O₃为主的氧化产物，其中合金GH3230因Al含量较低而发生内氧化现象。DD5表面发生Al₂O₃氧化膜剥落，而GH3536出现氧化物挥发。结果表明，4种合金的抗蒸汽氧化性能排序为K447 > GH3230 > DD5 > GH3536。

关键词 ：高温合金, 蒸汽氧化, 燃烧工况, 燃气轮机

Abstract：

The use of doped hydrogen or pure hydrogen as fuel poses a severe test to the key structural components of gas turbines, especially the resistance of materials to steam oxidation. The high-temperature steam oxidation behavior of 4 typical high temperature alloys, namely DD5, K447A, GH3230 and GH3536 for gas turbine in a mixed flow of air with 10% steam at 1000^oC was studied by means of mass change measurement and thermodynamic theoretical calculation. It follows that the GH3230 and K447A alloys showed an oxidation mass gain and followed a parabolic law, while the alloys DD5 and GH3536 showed oxidation mass loss on the contrary. The oxidation products formed on K447A and GH3230 alloy were mainly layered Cr₂O₃ and Al₂O₃ scales. The spallation of Al₂O₃ oxide scales occurred on the surface of DD5 alloy, while oxide volatilization was found on GH3536 alloy. In sum, the steam oxidation resistance of the four alloys may be ranked as following: K447 > GH3230 > DD5 > GH3536.

Key words： superalloys steam oxidation combustion condition gas turbine

收稿日期: 2023-04-11 32134.14.1005.4537.2023.105

ZTFLH:

TG174

基金资助:创新工程(211-XXXX-N106-01-04);自立科技研发专项项目(202206Z);国家科技重大专项(J2019-III-0012-0055)

通讯作者: 梁志远，男，1989年生，博士，副教授，E-mail：liangzy@xjtu.edu.cn，研究方向为能源装备环境行为

Corresponding author: LIANG Zhiyuan, E-mail: liangzy@xjtu.edu.cn

作者简介: 梁志远，男，1989年生，博士，副教授

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.105 或 https://www.jcscp.org/CN/Y2024/V44/I2/355

图1 高温蒸汽氧化实验系统示意图

表1 4种镍基合金化学成分

图2 4 种合金在1000℃下含水蒸汽的空气中氧化增重曲线结果

图3 4种合金氧化100、200和300 h后的XRD谱

图4 合金DD5氧化100、200和300 h后表面的SEM形貌

表2 DD5合金经100、200和300 h氧化后表面标记点(见图4)EDS成分分析结果

图5 K447A合金经100、200和300 h氧化后表面SEM形貌

表3 K447A合金经100 h、200 h和300 h氧化后表面标记点(见图5)EDS成分分析

图6 GH3230合金经100、200和300 h氧化后表面SEM形貌

表4 GH3230合金经100、200和300 h氧化后表面标记点(见图6)EDS成分分析结果

图7 GH3536合金经100 h、200 h和300 h氧化后表面SEM形貌

表5 GH3536合金经100、200和300 h氧化后表面标记点EDS成分分析结果

图8 DD5合金氧化300 h后断面形貌与EDS元素分布分析

图9 K447A合金氧化300 h后断面形貌与EDS元素分布分析

图10 K447A合金氧化100和300 h后断面形貌与EDS元素分布分析

图11 GH3536合金氧化300 h后断面形貌与EDS元素分布分析

表6 1000℃下主要合金元素与H2O反应的Gibbs自由能改变

No.	Chemical reaction equation	$P O 2$ / MPa
1	2Ni+O₂ (g)=2NiO	4.54 × 10^-12
2	2Mn+O₂(g)=2MnO	2.49 × 10^-23
3	4/3Cr+O₂ (g)=2/3Cr₂O₃	1.36 × 10^-23
4	4/3Al+O₂ (g)=2/3Al₂O₃	1.73 × 10^-36

表7 1000℃下主要合金元素氧化反应的平衡氧分压

图12 1000℃下Ni-Cr-Mn/Al-H-O体系的热力学相图

图13 不同合金在1000℃下含H2O的空气中氧化机理示意图

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