Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/43329
標題: Effect of carbon content on microstructural characteristics of the hypereutectic Fe-Cr-C claddings
作者: Chang, C.M.
吳威德
Lin, C.M.
Hsieh, C.C.
Chen, J.H.
Fan, C.M.
Wu, W.T.
關鍵字: Carbide
Welding
Microstructure
Hardness
white cast-iron
hardfacing alloys
liquidus surface
wear behavior
resistance
stability
carbides
steel
期刊/報告no:: Materials Chemistry and Physics, Volume 117, Issue 1, Page(s) 257-261.
摘要: The hypereutectic Fe-Cr-C claddings with different C contents were deposited on ASTM A36 steel substrates by flux cored arc welding (FCAW) to investigate that the effect of C content on microstructural characteristics. The results showed that the microstructure of hypereutectic Fe-Cr-C claddings consisted of primary proeutectic (Cr,Fe)(7)C(3) and the austenite plus (Cr,Fe)(7)C(3) eutectic. Proeutectic carbides undergone to several microstructural changes in response to higher carbon content in the cladding. The morphologies of proeutectic (Cr,Fe)(7)C(3) carbides changed from blade-like to rod-like with hexagonal cross section. The amounts of proeutectic (Cr,Fe)(7)C(3) carbides increased with increase of the C contents. The nucleation sites of proeutectic (Cr,Fe)(7)C(3) carbides increased under high undercooling condition. Hence, the latent heat of solidification can be released by formed proeutectic (CrFe)(7)C(3) carbides and then the growth of proeutectic (CrFe)(7)C(3) carbides were suppressed. Consequently, it showed a maximum hardness value (about HRC 62) when the amount of proeutectic (Cr,Fe)(7)C(3) carbides exceeded 86%. (c) 2009 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/43329
ISSN: 0254-0584
文章連結: http://dx.doi.org/10.1016/j.matchemphys.2009.05.052
Appears in Collections:材料科學與工程學系

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