556 KB14 KB200020242014Bílek, PavelČaplovič, L'ubomírČička, RomanJurči, PeterPašák, Matejletnik:48številka:5str. 693-696COBISSID:1095338ISSN:1580-2949URN:URN:NBN:SI:doc-WPCUEV7ZenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijechromiumfazna premenakromledeburitic steelsledeburitna jeklaorodna jeklaphase transformationThermo-Calctool steelsvanadijvanadiumStudy of phase transformations in Cr-V tool steel| Študij faznih premen v orodnem jeklu Cr-V|The properties of steels are very dependent on the phases present in the microstructure. The wear resistance and thermal stability of tool steels are achieved with the presence of different types of carbides. So the chemical composition and heat treatment play crucial roles in optimizing the properties of tool steels. The phase transformations in Cr-V tool steel were analyzed during the heating from room temperature up to 1100 °C using DTA and dilatometry. After soft annealing the microstructure of the investigated steel consists of a ferritic matrix and M7C3 and MC carbides, as determined with SEM, EDX and XRD techniques. The experimental results were compared to the computational results (Thermo-Calc)Lastnosti jekla so močno odvisne od faz, ki so v mikrostrukturi. Odpornost proti obrabi in toplotna stabilnost orodnih jekel se dosežeta z različnimi vrstami karbidov. Kemijska sestava in toplotna obdelava imata ključno vlogo pri optimiranju lastnosti orodnih jekel. DTA in dilatometrija sta bili uporabljeni za preučevanje faznih premen v orodnem jeklu Cr-V med ogrevanjem od sobne temperature do 1100 °C. Tehnike SEM, EDX in XRD so potrdile, da po mehkem žarjenju mikrostrukturo preiskovanega jekla sestavlja feritna osnova ter karbidi M7C3 in MC. Eksperimentalni rezultati so bili primerjani z izračunanimi (Thermo-Calc)TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije