Приказ основних података о документу
Physical simulation of finish rolling of microalloyed steels in isothermal conditions
Simulacija završnog valjanja mikrolegiranog čelika u izotermalnim uslovima
dc.creator | Dikić, Stefan | |
dc.creator | Glišić, Dragomir | |
dc.creator | Fadel, Abdunaser Hamza | |
dc.creator | Jovanović, Gvozden | |
dc.creator | Radović, Nenad | |
dc.date.accessioned | 2022-12-22T18:05:19Z | |
dc.date.available | 2022-12-22T18:05:19Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 0367-598X | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5285 | |
dc.description.abstract | The aim of this work was to establish a temperature of finish rolling stage of Nb/Ti microalloyed steel containing 0.06 wt.% C, 0.77 wt.% Mn, 0.039 wt.% Nb and 0.015 wt.% Ti, using physical simulation. Samples were subjected to laboratory simulation at a twist plastometer at high temperatures, i.e. between 825 and 950 °C. Five pass deformation and interpass times were selected in accordance with a processing parameters at five stand finishing hot strip mill. Restoration (recovery and/or recrystallization) behavior was evaluated by calculation of Fraction Softening (FS) and Area Softening Parameter (ASP) values. At 950 °C all individual pass stress-strain curves, FS and ASP show full recrystallization in all interpass intervals. On the other hand, with a decrease in temperature to the interval of 875-825 °C, the extent of restoration is decreasing, leading to recovery as a sole softening mechanism at 825 °C, which was confirmed by the stress-strain curve shape, and values of FS and ASP. It is assumed that, due to high supersaturation, strain-induced precipitation promoted pinning of grain and subgrain boundaries and suppressed recrystallization. Therefore, the critical temperature for finish rolling was estimated to be 825 °C. | sr |
dc.description.abstract | Cilj ovog rada je određivanje temperature završnog valjanja Nb/Ti mikrolegiranog čelika koji sadrži 0,06 % C, 0,77 % Mn, 0,039 % Nb i 0,015 % Ti. Uzorci su ispitivani laboratorijskom simulacijom, na plastomeru - uredjaju za ispitivanje uvijanjem, na temperaturama, između 825 i 950 °C. Režim deformacije u pet provlaka i pauza između provlaka odabrani su u saglasnosti sa parametraima valjanja na petostanskoj završnoj valjačkoj pruzi valjaonice toplovaljanih traka. Udeo obnovljene mikrostrukture (oporavljanja i/ili rekristalizacije) je određivan na osnovu proračuna prekidnog omekšavanja (engl. fraction softening, FS) i parametra omekšavanja na osnovu promene površine ispod krive (engl. area softening parameter, ASP). Na 950 °C krive deformacionog ojačavanja za svaki provlak, FS i ASP pokazuju ponašanje koje odgovara potpuno rekristalisanom uzorku. Udeo obnovljene mikrostrukture se smanjuje sa sniženjem temperature do intervala 875-850°C. Pretpostavlja se da zbog velikog presićenja dolazi do pojave taloženja izazvanog deformacijom, što utiče na smanjenje pokretljivosti granica zrna/subzrna što dovodi do potiskivanja rekristalizacije. Na 825°C obnavljanje se odvija isključivo mehanizmom oporavljanja pa se ova temperatura može uzeti za kritičnu temperaturu završnog valjanja. | |
dc.language.iso | en | sr |
dc.publisher | Association of the Chemical Engineers of Serbia | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200135/RS// | sr |
dc.rights | openAccess | sr |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.source | Hemijska industrija | sr |
dc.subject | fraction softening | sr |
dc.subject | mechanical metallography | sr |
dc.subject | deformation | sr |
dc.subject | recrystallization, critical rolling temperatures, controlled rolling | sr |
dc.subject | prekidno omekšavanje | |
dc.subject | mehanička metalografija | |
dc.subject | kontrolisano valjanje | |
dc.subject | rekristalizacija, deformacija | |
dc.subject | kritične temperature | |
dc.title | Physical simulation of finish rolling of microalloyed steels in isothermal conditions | sr |
dc.title | Simulacija završnog valjanja mikrolegiranog čelika u izotermalnim uslovima | |
dc.type | article | sr |
dc.rights.license | BY-NC-ND | sr |
dc.citation.epage | 236 | |
dc.citation.issue | 4 | |
dc.citation.rank | M23 | |
dc.citation.spage | 227 | |
dc.citation.volume | 76 | |
dc.identifier.doi | 10.2298/HEMIND220816018D | |
dc.identifier.fulltext | http://TechnoRep.tmf.bg.ac.rs/bitstream/id/13631/Physical_simulation_of_finish_pub_2022.pdf | |
dc.identifier.scopus | 2-s2.0-85143688340 | |
dc.type.version | publishedVersion | sr |