STP1532: The Effect of Si on the Precipitates for Nb Bearing High Purity Ferritic Stainless Steel

    Ito, Masatoshi
    Kyushu Univ., Fukuoka,

    Honda, Yuma
    Kyushu Univ., Fukuoka,

    Aramaki, Masatoshi
    Research Associate, Kyushu Univ., Fukuoka,

    Kato, Yasushi
    Senior Researcher, JFE Steel Corporation, Chiba,

    Furukimi, Osamu
    Professor, Kyushi Univ., Fukuoka,

    Pages: 6    Published: Apr 2012


    Abstract

    The effect of Si on the precipitation of the Laves phase in high purity 17Cr–0.5Nb ferritic stainless steel was investigated. Precipitation was observed using a scanning electron microscope and transmission electron microscope. Quantitative analysis of the amount of precipitates as Laves phase was performed. The precipitation rate of the Laves phase and the equilibrium amount of precipitates of the Laves phase increased with the amount of Si. A Si peak was detected in the Laves phase in 0.5Si steel by energy dispersive X-ray spectrometer analysis. It was revealed that precipitation of the Laves phase was promoted and the chemical composition of the Laves phase was changed by the addition of Si.

    Keywords:

    silicon, Laves phase, precipitation


    Paper ID: STP153220120008

    Committee/Subcommittee: D02.L0

    DOI: 10.1520/STP153220120008


    CrossRef ASTM International is a member of CrossRef.