龙会国,谢国胜,龙毅,牟申周

• 1:湖南省湘电锅炉压力容器检验中心有限公司
• 2:湖南省电力公司科学研究院

摘要(Abstract)：

通过对某电厂TP347H不锈钢管的过热器和再热器管样内壁氧化皮及其剥落物进行金相检验、扫描电镜观察、能谱分析、X衍射等分析,研究锅炉用奥氏体不锈钢管蒸汽侧氧化皮的形态及其形成规律。结果表明:根据氧元素分布规律、Fe-Cr-Ni元素由基体向外扩散传质及水蒸汽中H、O由氧化层向内扩散传质原理,该不锈钢蒸汽侧氧化皮分为内、中、外3层,内层为致密的(Cr,Fe)2O4、NiO等非均质层,中间层为疏松的粗大柱状结构的Fe3O4,最外层为厚度较薄的Fe2O3;内层/中间柱状氧化层界面存在离解后的细小的氧化物颗粒,使界面粘附强度低,组织疏松,从而使中间柱状氧化层更易剥落,该类奥氏体不锈钢蒸汽侧氧化皮剥落物主要是以外两层片状氧化皮为主。

关键词(KeyWords)： 奥氏体不锈钢;水蒸汽氧化;氧化皮;扩散传质;氧化机理

Abstract:

Keywords:

基金项目(Foundation): 科技型中小企业技术创新基金(11C26214302934)

作者(Author): 龙会国,谢国胜,龙毅,牟申周

DOI: 10.13289/j.issn.1009-6264.2013.09.003

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