超超临界机组HR3C不锈钢蒸汽侧氧化层的微观结构和生长机理
Microstructure and Growth Mechanism of the Oxide Scale Formed on HR3C at the Steam Side in Ultra Supercritical (USC) Units
摘 要
对华能玉环电厂运行了5400 h和23400 h的HR3C末级再热器管取样, 对蒸汽侧氧化层的结构、形貌和微区元素分布规律进行了研究。结果发现, 随着氧化的深入, HR3C蒸汽侧氧化层由二层结构发展成为四层结构, 靠近氧化层的基体金属中的贫Cr带是氧化层生长的捷径。探讨了HR3C蒸汽侧氧化层的生长机理。
超超临界机组
蒸汽侧氧化层结构
生长机理
HR3C
ultra supercritical(USC) unit
structure of steam side oxide scale
growth mechanism
Abstract
The structure, morphology and elemental micro-distributions of the steam side oxide scale of the HR3C reheater tubes after operation for 5400 h and 23400 h, respectively, in Huaneng Yuhuan Power Plant were studied. It was found that with the advance of oxidation process, the steam side oxide scale of HR3C tubes developed from a double-layer structure to a four-layer structure and the Cr-depleted zone was the shortcut for the growth of the oxide scale. The growth mechanism of the steam side oxide scale on HR3C was also discussed.
中图分类号 TG172.3
所属栏目 试验研究
基金项目
收稿日期 2010/12/15
修改稿日期 2010/12/23
网络出版日期
作者单位点击查看
备注唐丽英, 工程师,
引用该论文: TANG Li-ying,JIA Jian-min,CAI Hui,YIN Zun,LIU Hong-guo. Microstructure and Growth Mechanism of the Oxide Scale Formed on HR3C at the Steam Side in Ultra Supercritical (USC) Units[J]. Corrosion & Protection, 2011, 32(10): 775
被引情况:
【1】王斌,刘正东,程世长,刘春明,包汉生,王敬忠, "NF709奥氏体耐热钢700 ℃的蒸汽氧化行为",腐蚀与防护 34, 279-282(2013)
【2】程从前,刘宜萱,赵杰, "几种耐热钢在超(超)临界水中抗氧化性能的比较",机械工程材料 38, 55-58(2014)
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参考文献
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【2】Jia J M, Montgomery M, Larsen O H, et al. Investigation of steam oxidation behaviour of TP347H FG, partⅠ:Exposure at 256 bar[J]. Materials and Corrosion, 2005, 56(7):459-467.
【3】Jia J M, Montgomery M, Larsen O H, et al. Investigation of steam oxidation behaviour of TP347H FG part Ⅱ:Exposure at 91 bar[J]. Materials and Corrosion, 2005, 56(8):542-549.
【4】江哲生, 董卫国, 毛国光. 国产1000 MW超超临界机组技术综述[J]. 电力建设, 2007, 28(8):6-13.
【5】孙叶柱. 用于超超临界锅炉的Super304H材料的性能[J]. 电力建设, 2003, 24(9):11-14.
【6】Okada H, Igarashi M, Yamamoto S, et al. Long-term service experience with advanced austenitic alloys in eddystone power station[C]//San Antonio Texas:Proceedings of CREEP 8, 2007.
【7】Swindeman R W. The potential of modified type 310 stainless steel for advanced fossil energy applications[R]. ORNL/TM-12057, 1992.
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