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Structure degradation of 25Cr35Ni heat-resistant tube associated with surface coking and internal carburization
Wu, XQ; Yang, YS; Zhan, Q; Hu, ZQ
Corresponding AuthorWu, XQ()
1998-10-01
Source PublicationJOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
ISSN1059-9495
Volume7Issue:5Pages:667-672
AbstractMicrostructures of 25Cr35Ni heat-resistant cracking tube after service were investigated and degradation mechanism of tube material was discussed. Results reveal that three distinguished zones, that is, internal oxide, carbide free, and internally carburized zones, will gradually develop in the inner wall of a cracking tube during service. Carbide free and internally carburized zones are formed primarily in relation to the periodic spalling and regeneration of surface oxide scale, and diffusion velocity of carbon and carbide forming elements in matrix and the solubility limit of carbon in alloy. The formation and growth of filament coke can aggravate structure degradation of the inner wall of the cracking tube, while deposition of lamellar and spheroidal coke may slow structure degradation to some extent, Surface coking and decoking cycles strongly aggravate the structure degradation of tube material and damage the service life of the cracking tube.
Keywordcarburization coking heat-resistant alloy
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000076210600012
PublisherASM INTERNATIONAL
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/108103
Collection中国科学院金属研究所
Corresponding AuthorWu, XQ
AffiliationChinese Acad Sci, Dept Superalloy & Special Casting, Met Res Inst, Shenyang 110015, Peoples R China
Recommended Citation
GB/T 7714
Wu, XQ,Yang, YS,Zhan, Q,et al. Structure degradation of 25Cr35Ni heat-resistant tube associated with surface coking and internal carburization[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,1998,7(5):667-672.
APA Wu, XQ,Yang, YS,Zhan, Q,&Hu, ZQ.(1998).Structure degradation of 25Cr35Ni heat-resistant tube associated with surface coking and internal carburization.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,7(5),667-672.
MLA Wu, XQ,et al."Structure degradation of 25Cr35Ni heat-resistant tube associated with surface coking and internal carburization".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 7.5(1998):667-672.
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