Effect of carbon structure crystallinity on initial stage of iron carburization

Ko Ichiro Ohno, Takayuki Maeda, Koki Nishioka, Masakata Shimizu

Research output: Contribution to journalArticle

Abstract

Iron carburization is one of the most important reactions in iron making process. Ifthe rate and efficiency of carburization reaction are increased, energy consumption of the process will be reduced to a large extent. The purpose of this study is to clarify the effect of carbon structure on initial iron carburization behavior for suggestion of effective carbon utilization in iron making process. Samples of different carbon structures were prepared by heat treatment of CH4 decomposed carbon at various temperatures. Carbon structures of prepared carbon samples were analyzed by a Raman spectroscopy. Forexperiments, high-purity iron samples directly-contacted with carbon were prepared. A laser microscope combined with an infrared image furnace was used for heating of the sampleand "in-situ" observation of carburization phenomena. Carbon concentration profile in ironsample was analyzed by a wavelength dispersion type electron probe micro analyzer. The results of this work showed that primary Fe-C liquid formation temperature becamelower from 1439 to 1431K with use of lower crystallization carbon. It was indicated that utilization of the lower crystallization degree of carbon structure causes formation of primary Fe-C liquid at the lower temperature.

Original languageEnglish
Pages (from-to)475-481
Number of pages7
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume96
Issue number8
DOIs
Publication statusPublished - Oct 19 2010

Fingerprint

crystallinity
Carbon
Iron
iron
carbon
Crystallization
image furnaces
crystallization
Liquids
energy consumption
electron probes
liquids
Temperature
suggestion
Raman spectroscopy
analyzers
purity
Furnaces
Microscopes
heat treatment

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Effect of carbon structure crystallinity on initial stage of iron carburization. / Ohno, Ko Ichiro; Maeda, Takayuki; Nishioka, Koki; Shimizu, Masakata.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 96, No. 8, 19.10.2010, p. 475-481.

Research output: Contribution to journalArticle

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