Microstructure and properties of gas atomized UHCS compacted by HIP and SPS

Juha Lagerbom, Jouko Virta, Juho Lotta, Katri Honkanen, Simo-Pekka Hannula

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Ultra-high carbon steels (UHCS) are hypereutectoid steels containing 1.0-2.1% carbon. Exceptional mechanical properties have been reported in materials processed to fine ferrite grains with fine spherical carbides. In this study UHCS C 1.6, Al 1.67, Cr 1.28, Si 0.72, Mn 0.72 wt.-% was cast and hot rolled (HR), hot isostatical pressed (HIP) and spark plasma sintered (SPS). Microstructures, phase structures and mechanical properties were compared. Processing parameters affect the microstructure considerably. HIP and SPS materials had with optimum parameters fine spherical carbides and fine-grained ferrite/perlite structure. Hot rolled material had coarser microstructure with large ferrite grains. Hot rolled material had higher hardness and lower elasticity than PM-materials. Heat-treated materials were also compared using hardness testing and tensile testing.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publicationEURO PM2013
    Place of PublicationGöteborg
    PublisherEuropean Powder Metallurgy Association (EPMA)
    ISBN (Electronic)978-1-899072-40-8
    Publication statusPublished - 2013
    MoE publication typeA4 Article in a conference publication
    EventEuro PM2013 - Gothenburg, Sweden
    Duration: 15 Sept 201318 Sept 2013


    ConferenceEuro PM2013


    • powder
    • gas atomization
    • HIP


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