12 KB372 KB11 KB200020262006Drnek, JaroslavKraus, LiborMotyčka, Petrštevilka:33 straniletnik:40str. 111-113ISSN:1580-2949COBISSID:560810URN:URN:NBN:SI:doc-QXO7F20SenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijehitrost ohlajanjajeklomanganmikrolegiranjemikrostrukturaInfluence of micro-alloying on the phase transformations in cast manganese steels|The influence of m icro-alloying on the course of phase transformations in cast manganese steel with 0.15 % C and 1.2 % Mn was studied. Vanadium, niobium and titanium were added as micro-alloying additions. Changes in the Asub(C1) and Asub(C3) temperatures as well as the austenite transformation were recorded using dilatometry. The resulting microstructure and hardness (HV30) of samples cooled with various cooling rates and the possibility of a decrease in the critical hardening cooling rate are discussedRaziskan je bil vpliv mikrolegiranja na fazne premene v jeklu z 0,15 % C in 1,2 % Mn ter vanadijem, niobijem in titanom kot mikrolegirnimi elementi. Z dilatometrijo so bile določene temperature Aspodaj(C1) in Aspodaj(C3) ter premene avstenita. Podana je ocena nastalih mikrostruktur, trdota (HV 30) vzorcev, ohlajenih z različno hitrostjo, in možnosti zmanjšanja kritične hitrosti kaljenjaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije