期刊论文

中文

武汉大学学报(工学版)

1671-8844

2010

43

5

658-661,680

本校为其他机构

利用扫描电镜,电子探针和X射线衍射技术对某电厂高温高压水蒸汽工况下运行15万h的10CrMo910钢主蒸汽管形成的氧化膜进行形貌,结构,成分及物相分析,结果表明:氧化膜外表面形貌呈丘状或蘑菇云状,低倍下横断面呈石状,有明显分层,层间存在大量孔隙;内层氧化膜结构致密,外层氧化膜结构疏松,但无贯穿内,外氧化层的缝隙或孔洞链;氧化膜晶粒大多为纳米晶粒,少量为微米晶粒,部分晶粒之间存在较大尺寸的片状晶粒;在氧化膜横断面上,O,Fe的分布较为均匀;外层氧化膜中的Cr,Mo含量较低,且分布均匀;内层氧化膜中的Cr,Mo含量显著高于外层氧化膜,较外层氧化膜有一突变,且Cr,Mo分布存在浓度梯度,在靠近内层-外层氧...

The pattern, structure, composition and phase of oxide films of the 10CrMo910 steel main steam pipe under high temperature and high pressure water vapor after 150 thousand hours＇ running were studied using SEM, EPMA and XRD. The results indicate： the exterior surface of oxide films appears buninoid, or mushroom cloud~ the cross section presents stone shaped and layered. There are no penetrating apertures in the oxide films. Moreover, compared with the inner-layer oxide films, the outer ones present much looser structure. Most of the oxides ar...