Characterization of functional gradient structures in duplex stainless steel castings

Jyri Tiusanen, Kati Rissa, Tapio Ritvonen, Juha Lagerbom, Kaisu Keskiaho, Toivo Lepistö

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Titanium carbide particle reinforced metal-matrix composite coatings, formed on duplex (austenitic/ferritic) stainless steel castings, were studied. These coatings, developed for wear applications, develop a functional gradient structure through a self-propagating high-temperature synthesis (SHS) of titanium carbide (TiC). This SHS-reaction was ignited in reactive inserts by the heat of liquid steel. The reactive inserts were compressed from mixtures of titanium, carbon and molybdenum powders together with iron or duplex stainless steel powders. The coating micro­structure depends on the reactive insert composition. Molybdenum reduced the TiC particle diameter, and reducing the binder content reduced the areal fraction of TiC.
    Original languageEnglish
    Pages (from-to)293-300
    Number of pages8
    JournalEstonian Journal of Engineering
    Volume15
    Issue number4
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Keywords

    • particle reinforced cast structure
    • SHS-reaction
    • metal-matrix composite
    • coating
    • TiC
    • duplex stainless steel
    • interface

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