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Depletion of Solid Solution Elements and Change of Carbides in Artificially Aging Heat Treated 2.25CrMo Steel  

Byeon, Jal Won (Research Institute of Engineering and Technology, Korea University)
Pyo, S.W. (Division of Materials Science and Engineering, Korea University)
Kwun, S.I. (Division of Materials Science and Engineering, Korea University)
Publication Information
Journal of the Korean Society for Heat Treatment / v.15, no.2, 2002 , pp. 70-75 More about this Journal
Abstract
The depletion of solid solution elements from matrix and the change of carbides during artificial aging of 2.25CrMo steel at $630^{\circ}C$ were investigated. The Mo and Cr elements were found to be depleted drastically in the early stage of aging. The change of carbides was confirmed by analyzing the XRD patterns of electrolytically extracted carbides. Four type of carbides, $M_{23}C_6$, $M_3C$, $M_2C$ and $M_6C$, were found to exist in the specimen before aging. The amount of $M_6C$ carbides increased with aging time, while that of $M_3C$ carbides diminished after short aging time.
Keywords
Aging degradation; 2.25CrMo steel; carbide characteristic; electrolytic extraction; solid solution element;
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