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材料研究学报  2008, Vol. 22 Issue (6): 599-605    
  研究论文 本期目录 | 过刊浏览 |
9Cr--1Mo钢在含水蒸汽气氛中的氧化行为
张都清1;3;徐敬军2;赵国群1†;管延锦1;李美栓2
1.山东大学 济南 250013
2.中国科学院金属研究所沈阳材料科学国家实验室 沈阳 110016
3.山东电力研究院 济南 250002
Oxidation characteristic of ferritic–martensitic steel T91 in water–vapour atmosphere
 ZHANG Duqing1;3; XU Jingjun2; ZHAO Guoqun1†; GUAN Yanjin1; LI Meishuan2
1.School of Materials Science & Engineering; Shandong University; Jinan 250061
2.Institute of Metal Research Chinese Academy of Sciences; Shenyang; 110016
3.Shandong Electric Research Institute; Jinan; 250013
引用本文:

张都清 徐敬军 赵国群 管延锦 李美栓. 9Cr--1Mo钢在含水蒸汽气氛中的氧化行为[J]. 材料研究学报, 2008, 22(6): 599-605.
, , , , . Oxidation characteristic of ferritic–martensitic steel T91 in water–vapour atmosphere[J]. Chin J Mater Res, 2008, 22(6): 599-605.

全文: PDF(1377 KB)  
摘要: 

研究了9Cr--1Mo(ASME T91)钢在(Ar+10%H2O)气氛中600℃、650℃和700℃下的高温氧化行为. 在恒温氧化10 h过程中, 在600℃氧化遵从抛物线规律;而在650℃和700℃氧化则遵从分阶段抛物线规律, 且后一阶段的速度常数高于前一阶段的;随着温度的升高, 氧化速度明显增大; 氧化激活能为157.2 kJ/mol.T91钢氧化时表面形成了多层结构的氧化膜, 从外到内依次为Fe2O3、Fe3O4和 (Fe,Cr)3O4; 钢基体也发生了内氧化,内氧化物为FeO和Cr2O3. 只有在700℃氧化时没有外层Fe2O3 形成和内氧化发生. 9Cr--1Mo钢氧化后冷却至室温后, 氧化膜发生开裂或局部剥落.最外层Fe2O3与次外层Fe3O4间出现很大的裂隙,Fe2O3层容易剥落. 同时探讨了9Cr--1Mo钢在含水蒸汽气氛中的氧化机制.

关键词 金属材料 9Cr--1Mo 水蒸汽 氧化膜 氧化 腐蚀    
Abstract

The oxidation behavior of 9Cr-1Mo steel in (Ar+10%H2O) atmosphere at 600 °C, 650 °C and 700 °C was investigated. During oxidation for 10h the oxidation kinetics followed parabolic law at 600 °C, but two–stage parabolic law at 650 °C and 700 °C, in which the rate constant at the initial stage was higher than that at the second stage. With increasing temperature, the oxidation rate of T91 steel increased significantly. The oxidation activation energy was identified as 157.2 kJ/mol. The oxide scale with three–layer microstructure was composed of Fe2O3, Fe3O4 and (Fe, Cr)3O4 in the order from the top layer to the inner layer. Meanwhile the internal oxidation was also observed, the corresponding internal oxides were Cr2O3 and FeO. However, at 700 °C, neither Fe2O3 outer layer nor internal oxides formed. The outer layer (Fe2O3) had a weak adhesion to the intermediate layer (Fe3O4) and easily spalled during cooling from oxidation temperature to room temperature. The oxidation mechanism of T91 in (Ar+H2O) atmosphere was discussed finally.

Key wordsmetal material    9Cr–1Mo steel    water vapor    oxide scale    oxidation    corrosion
收稿日期: 2008-02-18     
ZTFLH: 

TG172

 
基金资助:

华电国际重点基金2006年生字第8号资助项目

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