Production of Fe-C alloys through reduction and sintering of cementite powders in hydrogen gas atmosphere

Koichi Nakashima, Nobuaki Ouchida, Makoto Egashira, Toshihiro Tsuchiyama, Setsuo Takaki

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    In recent years, it has become important to reduce emission of CO 2 from the iron and steel making process in terms of preserving ecological environment. Cementite is recognized as a new iron resource because there is no CO2 emission on the reduction of cementite to iron. In this study, a new steel making process through reduction and sintering treatment of cementite powder was proposed, and microstructure of the material obtained by this process was examined by scanning electron microscopy and EBSP analysis. The cementite powder obtained by mechanical alloying technique was compacted and then subjected to the reduction and sintering treatment in H2 gas atmosphere at 1073-1273K in order to obtain bulky steel materials. The relative density of sintered material became 95% or more when the sintering was performed at 1173K. The sintered material has ferrite-pearlite structure of the grain size of around 5 μm. This result demonstrates that the reduction and sintering of cementite is one of useful methods to fabricate fine-grained steel without CO2 emission.

    Original languageEnglish
    Pages (from-to)228-233
    Number of pages6
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume93
    Issue number3
    DOIs
    Publication statusPublished - Mar 2007

    All Science Journal Classification (ASJC) codes

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

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