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  • Comparison of measured and calculated thickness of martensite and ledeburite shells around graphite nodules in the hardened layer of nodular iron 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. Because of the rapidity of laser beam action on the surface of the specimen ... material, melting occurs only in a thin surface layer. After the laser beam has passed along the specimen, thanks to very rapid heat transfer from the surface to the interior of the specimen, we can achieve very rapid solidification of the melted pool and self-hardening of the rest of the modified layer. 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 can offer 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 analyse the occurrence of martensite shells or ledeburite shells around the graphite nodules in the ferrite matrix. The size of the shells was later supported by simple diffusion calculations.
    Vir: Applied Surface Science. - ISSN 0169-4332 (Vol. 187, no. 1/2, 2002, str. 116-123)
    Vrsta gradiva - članek, sestavni del
    Leto - 2002
    Jezik - angleški
    COBISS.SI-ID - 5123355

    Povezava(-e):

    http://www.elsevier.com/gej-ng/29/30/23/114/27/41/abstract.html

    PII: S0169-4332(01)00823-6

    Prosto dostopen samo abstrakt članka


    http://www.sciencedirect.com/science/journal/01694332

    DOI: 10.1016/S0169-4332(01)00823-6

    Dostop do polnega teksta za člane



vir: Applied Surface Science. - ISSN 0169-4332 (Vol. 187, no. 1/2, 2002, str. 116-123)
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