| 引用本文: | 杜尚,孙钢,陈国帅,贾皓东,王优,周张健.含铝奥氏体不锈钢时效处理及热力耦合过程中沉淀相的析出及基体组织演变研究进展[J].材料科学与工艺,2025,33(2):1-11.DOI:10.11951/j.issn.1005-0299.20230241. |
| DU Shang,SUN Gang,CHEN Guoshuai,JIA Haodong,WANG You,ZHOU Zhangjian.Research developments of evolution of precipitation phase and matrix structure in aging treatment and thermodynamic coupling process for alumina-forming austenitic steel[J].Materials Science and Technology,2025,33(2):1-11.DOI:10.11951/j.issn.1005-0299.20230241. |
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| 摘要: |
| 为了解决我国能源需求量增加与环境污染加剧的现状,高参数的超超临界火力发电厂及高效先进核电机组亟待被研发,而其高温高压强腐蚀的严苛的服役环境给高温结构材料带来了严峻的挑战。新型含铝奥氏体不锈钢(Alumina Forming Austenitic Steel,AFA钢) 因其优异的抗氧化性能和高温力学性能,有望成为超超临界火力发电厂以及超临界水冷堆等发电站的关键部件候选材料。时效处理及热力耦合过程中AFA钢基体组织和沉淀相会发生复杂的演变,对其高温力学性能产生影响。本文总结了成分设计、时效温度以及时效时间对AFA钢沉淀相析出行为的影响,阐述了AFA钢在热力耦合过程中基体组织的变化、沉淀相的演变及蠕变断裂的原因,并对AFA钢沉淀相析出的优化及蠕变性能的提升给出了建议和展望。 |
| 关键词: 含铝奥氏体不锈钢 沉淀相 时效处理 组织演变 蠕变性能 |
| DOI：10.11951/j.issn.1005-0299.20230241 |
| 分类号:TG113 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51001299,U1967212). |
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| Research developments of evolution of precipitation phase and matrix structure in aging treatment and thermodynamic coupling process for alumina-forming austenitic steel |
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DU Shang1, SUN Gang2, CHEN Guoshuai1, JIA Haodong1, WANG You1, ZHOU Zhangjian1
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(1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Capital Engineering & Research Incorporation Limited, Beijing 100176, China)
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| Abstract: |
| In order to address the increasing energy demand and escalating environmental pollution in China, the development of high parameter ultra-supercritical thermal power plants and efficient advanced nuclear power units is urgently needed. However, the harsh service environment of high temperature, high pressure, and strong corrosion poses severe challenges to high-temperature structural materials. The new alumina-forming austenitic steel (AFA steel), which has excellent oxidation resistance and high temperature mechanical properties, holds promising potential as a candidate material for key components of ultra-supercritical units, supercritical water reactor and other power plants. During the aging treatment and thermal coupling process, the microstructure of matrix and precipitates of AFA steel evolve complicatedly, affecting its high-temperature mechanical properties. This paper summarizes the effects of composition design, aging temperature, and aging time on precipitation phase. It illustrates the changes in matrix structure, evolution of precipitation phase, and reasons for creep fracture of AFA steel during the thermal coupling process. Finally, suggestions and prospects are provided for optimization of precipitation phase and improvement of creep performance of AFA steel, providing reference for future research on improving the high-temperature mechanical properties of AFA steel. |
| Key words: alumina-forming austenitic steel precipitated phase aging treatment evolution of matrix structure creep performance |
