Microstructure control for toughening a high carbon martensitic stainless steel

Toshihiro Tsuchiyama, Yoshinori Ono, Setsuo Takaki

    研究成果: ジャーナルへの寄稿学術誌査読

    6 被引用数 (Scopus)

    抄録

    A High carbon martensitic stainless steel (Fe-12%Cr-0.7%C) was subjected to isothermal aging after full solution treatment, and then solution-treated again in the two phase region of austenite and M23C6 carbide; partial solution (PS) treatment. Microstructural development during these heat treatment was investigated, and mechanical properties for the PS treated steel were evaluated by comparison with a referencial steel without isothermal aging. During the isothermal aging at 923K, the supercooled austenite undergoes eutectoid transformation and decomposes to ferrite and M23C6 carbide, and the carbide particles are finely dispersed within the matrix. Insoluble carbide particles retained during the following PS treatment contribute to suppressing austenite grain growth effectively through the grain boundary pinning effect. Ductile-brittle transition in the PS treated steel is characterized by a lower transition temperature and a higher upper-shelf energy compared with the referencial steel. This is due to the grain refining of prior austenite as well as the homogeneous dispersion of carbide particles through the PS treatment with isothermal aging.

    本文言語英語
    ページ(範囲)S184-S188
    ジャーナルisij international
    40
    SUPPL.
    DOI
    出版ステータス出版済み - 2000

    !!!All Science Journal Classification (ASJC) codes

    • 材料力学
    • 機械工学
    • 金属および合金
    • 材料化学

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