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  • Comparison of measured and calculated thickness of martensite and ledeburite shells around graphite nodules in the hardened layer after laser surface remelting
    Grum, Janez, 1946- ; Šturm, Roman, 1965-
    The application of laser surface remelting to nodular iron 400-12 causes the material to undergo microstructural changes. The process of rapid heating above the melting-point temperature and the ... temperature of the austenitic transformation creates conditions for the formation of metastable microstructures that are the carriers of important technological properties such as high hardness, good wear and corrosion resistance. A newly created austenite-cementite microstructure with the presence of graphite nodules in the remelted layer and a martensite-ferrite microstructure with graphite nodules in the hardened layer have been observed. Microscopy of the hardened layer was used to analyze the occurrence of martensite or shells ledeburite shells around the graphite nodules in ferrite matrix. The size of the shells was later supported by diffusion calculations. The qualitative effects of the changed microstructures were additionally verified by microhardness measurements in the modified layer and microhardness measurements of characteristic microstructures around the graphite nodules in the hardened layer.
    Vir: Proceedings of DIMAT2000 (Part 2, str. 1774-1778)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2001
    Jezik - angleški
    COBISS.SI-ID - 4474395

vir: Proceedings of DIMAT2000 (Part 2, str. 1774-1778)
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