Physical simulation of finish rolling of microalloyed steels in isothermal conditions
Simulacija završnog valjanja mikrolegiranog čelika u izotermalnim uslovima
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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.
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 d...olazi 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.
Ključne reči:
fraction softening / mechanical metallography / deformation / recrystallization, critical rolling temperatures, controlled rolling / prekidno omekšavanje / mehanička metalografija / kontrolisano valjanje / rekristalizacija, deformacija / kritične temperatureIzvor:
Hemijska industrija, 2022, 76, 4, 227-236Izdavač:
- Association of the Chemical Engineers of Serbia
Finansiranje / projekti:
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200135 (Univerzitet u Beogradu, Tehnološko-metalurški fakultet) (RS-MESTD-inst-2020-200135)
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Dikić, Stefan AU - Glišić, Dragomir AU - Fadel, Abdunaser Hamza AU - Jovanović, Gvozden AU - Radović, Nenad PY - 2022 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5285 AB - 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. AB - 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. PB - Association of the Chemical Engineers of Serbia T2 - Hemijska industrija T1 - Physical simulation of finish rolling of microalloyed steels in isothermal conditions T1 - Simulacija završnog valjanja mikrolegiranog čelika u izotermalnim uslovima EP - 236 IS - 4 SP - 227 VL - 76 DO - 10.2298/HEMIND220816018D ER -
@article{ author = "Dikić, Stefan and Glišić, Dragomir and Fadel, Abdunaser Hamza and Jovanović, Gvozden and Radović, Nenad", year = "2022", 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., 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.", publisher = "Association of the Chemical Engineers of Serbia", journal = "Hemijska industrija", title = "Physical simulation of finish rolling of microalloyed steels in isothermal conditions, Simulacija završnog valjanja mikrolegiranog čelika u izotermalnim uslovima", pages = "236-227", number = "4", volume = "76", doi = "10.2298/HEMIND220816018D" }
Dikić, S., Glišić, D., Fadel, A. H., Jovanović, G.,& Radović, N.. (2022). Physical simulation of finish rolling of microalloyed steels in isothermal conditions. in Hemijska industrija Association of the Chemical Engineers of Serbia., 76(4), 227-236. https://doi.org/10.2298/HEMIND220816018D
Dikić S, Glišić D, Fadel AH, Jovanović G, Radović N. Physical simulation of finish rolling of microalloyed steels in isothermal conditions. in Hemijska industrija. 2022;76(4):227-236. doi:10.2298/HEMIND220816018D .
Dikić, Stefan, Glišić, Dragomir, Fadel, Abdunaser Hamza, Jovanović, Gvozden, Radović, Nenad, "Physical simulation of finish rolling of microalloyed steels in isothermal conditions" in Hemijska industrija, 76, no. 4 (2022):227-236, https://doi.org/10.2298/HEMIND220816018D . .