中国电力2013，Vol.46Issue(1)：54-58,5.
9Cr1MoVNb钢蒸汽侧氧化膜形态及其形成机理
Study on Steam-Side Oxidation Mechanism and Characterization of Oxide Scales Grown on T91 Tubes
谢国胜 1龙会国 2龙毅3
作者信息
- 1. 湖南省湘电锅炉压力容器检验中心有限公司,湖南长沙410007
- 2. 湖南省电力公司科学研究院,湖南长沙410007
- 折叠
摘要
Abstract
The oxidation mechanism and characterization of steam-side oxidation scale formed on the internal surface of the super-heater tubes made of T91 steel removed from the boiler of a power plant are studied by using the testing and analyzing methods of metallurgic inspection, scanning electron microscope-energy dispersive X-ray (SEM-EDX) and X-ray diffraction analysis. The results show that based on the section oxygen elemental distribution and the Fe-Cr elemental diffraction rule, the original steam-side oxidation scale normally consists of three layers. The inner layer is heterosphere oxides, which consists of Cr-enriched and Cr-depleted zones appearing alternatively; the middle layer is the loose and porous Fe3O4 with the columnar crystal microstructure; the outer layer is the thin Fe2O3. In the outer layer, there are small gaps among the oxides and the adhesion is weak, which makes it easy for the oxides to flake off during great temperature variation. The middle layer works better than the outer one.关键词
T91/水蒸气氧化/氧化膜/扩散传质/氧化机理Key words
T91/steam oxidation/oxidation scale/diffraction/oxidation mechanism分类
能源科技引用本文复制引用
谢国胜,龙会国,龙毅..9Cr1MoVNb钢蒸汽侧氧化膜形态及其形成机理[J].中国电力,2013,46(1):54-58,5.
