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Metal dusting phenomenon during carburization of FeNiCr‐alloys at 850–1000°C
Author(s) -
Forseth S.,
Kofstad P.
Publication year - 1995
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19950460403
Subject(s) - metallurgy , carbide , materials science , austenite , graphite , metal , chromium , decomposition , decarburization , chemistry , microstructure , organic chemistry
Three austenitic FeNiCr steels, G 4848, G 4852 and 36 XM, have been corroded in CH 4 + H 2 mixtures at 850, 900 and 1000°C. Under these conditions a new metal dusting phenomenon has been observed where closed cavities near the exposed surfaces of the alloys are filled with a powdery mixture of graphite, iron metal, chromium carbide and also in cases SiO 2 . It is tentatively concluded that the powder is formed through the decomposition of (Cr, Fe) 7 C 3 .