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http://dx.doi.org/10.7842/kigas.2012.16.5.28

Material Degradation of 2Cr and 12Cr Tube Steels for High Temperature and Long-Time Exposure  

Choe, Byung-Hak (Department of Metal and Materials Engineering, Gangneung-Wonju National University)
Lee, Gil Jae (Technical Expert Team Power Generation Department, Korea East-West Power Co.,LTD.)
Kim, Sang-Ho (Ocean Plant Research Division Maritime and Ocean Engineering Research Institute Korea Institute of Ocean Science & Technology)
Hong, Key-Yong (Ocean Plant Research Division Maritime and Ocean Engineering Research Institute Korea Institute of Ocean Science & Technology)
Kim, Woo Sik (Research and Development Center, Korea Gas Corporation)
Baek, Un Bong (Division of Industrial Metrology, Korea Research Institute of Standards and Science)
Nahm, Seung Hoon (Division of Industrial Metrology, Korea Research Institute of Standards and Science)
Publication Information
Journal of the Korean Institute of Gas / v.16, no.5, 2012 , pp. 28-34 More about this Journal
Abstract
Material degradation of Cr steels in using for boiler tubes was studied in the relation of microstructural changes like carbide behavior and mechanical properties of hardness and creep-rupture life. The carbide dissolution was occurred in 2Cr steel of T22 during high temperature operation. And the grain refinement within martensite lath of 12Cr steel of X20 was derived by the high temperature-long time exposure. But the specific phenomena of material degradation which might be represented by hardness or creep-rupture time of the used tubes were not shown in all the tubes of T22 and X20 even in the fire-side using.
Keywords
Material degradation; Cr steel; carbide behavior; grain refinement; creep-rupture time;
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Times Cited By KSCI : 1  (Citation Analysis)
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