Control of graphite formation in solidification of white cast iron

V. Sergio, S. Ishikawa, K. Yamamoto, H. Miyahara, K. Ogi, K. Kamimiyada

    研究成果: ジャーナルへの寄稿学術誌査読

    9 被引用数 (Scopus)

    抄録

    Graphite formation should be strictly suppressed for the most abrasion resistant white cast irons, since austenite (γ) +graphite eutectic structure shows lower hardness and selectively wears thus deteriorates the abrasion resistance even though the austenite transform to hard phase such as martensite. On the other hand, a small amount of fine graphite is desired to distribute in rolls for hot steel mills to suppress the scoring. However, strong carbide formers such as Cr, V, Nb have been increasingly added to rolls, in order to crystallise more harder carbides. As γ+carbide eutectic grows, the residual liquid among eutectic cells becomes poor in carbide formers and rich in elements which promote graphite formation. Therefore an appropriate alloy design is essential for the hot steel milling rolls. In this study, the graphite formation mechanisms are discussed for chromium cast iron, high speed steel type cast iron and Ni hard type cast iron.

    本文言語英語
    ページ(範囲)27-30
    ページ数4
    ジャーナルInternational Journal of Cast Metals Research
    21
    1-4
    DOI
    出版ステータス出版済み - 8月 2008

    !!!All Science Journal Classification (ASJC) codes

    • 材料力学
    • 機械工学
    • 金属および合金

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