Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/43330
標題: Effect of carbon content on microstructure and corrosion behavior of hypereutectic Fe-Cr-C claddings
作者: Chang, C.M.
吳威德
Hsieh, C.C.
Lin, C.M.
Chen, J.H.
Fan, C.M.
Wu, W.T.
關鍵字: Carbides
Welding
Microstructure
Corrosion
white cast irons
hardfacing alloys
structural characteristics
(cr,fe)(23)c-6 carbides
liquidus surface
wear behavior
resistance
solidification
期刊/報告no:: Materials Chemistry and Physics, Volume 123, Issue 1, Page(s) 241-246.
摘要: The aim of this study was to examine the influence of carbon content on the microstructures and corrosion characteristics. The results showed that the hypereutectic microstructure comprised primary (Cr,Fe)(7)C(3) carbides and the eutectic colonies [gamma-Fe + (Cr,Fe)(7)C(3)]. The amounts of primary (Cr,Fe)(7)C(3) carbides increased from 33.81 to 86.14% when carbon content increased from 3.73 to 4.85 wt%. The corrosion resistance of the hypereutectic alloy with 4.85 wt% C was about 20 times higher than that with 3.73 wt% C. The galvanic corrosion occurred in all claddings due to difference of corrosion potential between primary carbide and austenite. The dense distribution of primary carbides could retard the austenitic matrix from selective corrosion. The austenite dissolved the Fe(2+) ions and formed a Cr(2)O(3) film under 3.5% NaCl aqueous solution. (C) 2010 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/43330
ISSN: 0254-0584
文章連結: http://dx.doi.org/10.1016/j.matchemphys.2010.04.003
Appears in Collections:材料科學與工程學系

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