from the conferences organized by TANGER Ltd. provisional website
Work is aimed at three laboratory manufactured high strength manganese steels after cast, rolling and aging process (at 500 °C after 6, 12, 30 and/or 60 minutes of dwell). Micro-hardnesses (HV0.2) as well as potential k-carbides formation of micro- and/or nano-size and microstructures characters of all treatment modes are mutually compared. Revealed disproportions are explained by differences in chemical composition and in finishing hot rolling temperature leading to undesirable coarser k-carbides formation on the austenite-austenite, resp. austenite-ferite interphase. Simultaneously, changes in selected thermos-physical parameters both after hot rolling and after subsequent aging (560 °C / 6 minutes) were studied. Between micro-hardness and those thermos-physical parameters some proportionality was observed.Keywords: high strength manganese steel, micro-hardness, k-carbides, microstructure, thermo-physical parameter
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