Thermal-mechanical-microstructural model of rolling and cooling of rails

• Autorzy: Smyk G. , Pernach M. , Ambroziński M.

Warianty tytułu

PL

Cieplno-mechaniczno-mikrostrukturalny model walcowania i chłodzenia szyn

• Języki publikacji: EN

Abstrakty

EN

The paper describes complex thermal-mechanical-microstructural model of rolling and cooling of rails. The equations describing microstructure evolution and phase transformations in rail steels were implemented in the Finite Element code, which simulates thermal and mechanical phenomena. Numerical tests of the model were performed. Simulations covered last three passes of the rolling process followed by controlled cooling of the rail head. The results included changes of the temperature during the whole manufacturing cycle, as well as changes of the austenite grain size during rolling and kinetics of the phase transformations during cooling. Numerical tests confirmed good predictive capabilities of the model.

PL

W artykule opisano cieplno-mechaniczno-mikrostrukmralny model walcowania i kontrolowanego chłodzenia szyn. Modele opisujące rozwój mikrostruktury i przemiany fazowe w stalach szynowych zostały zaimplementowane w programie z metody elementów skończonych, który symuluje zjawiska cieplne i mechaniczne. Przeprowadzone zostały numeryczne testy opracowanego programu. Symulacje objęły ostatnie trzy przepusty w procesie walcowania oraz proces kontrolowanego chłodzenia główki szyny po walcowaniu. W pracy przedstawiono wyniki w postaci rozkładów odkształceń i naprężeń oraz zmian temperatury w procesie walcowania, a także zmian wielkości ziarna austenitu w poszczególnych przepustach i kinetyki przemian fazowych w czasie chłodzenia. Numeryczne testy potwierdziły duże możliwości obliczeniowe modelu.

Słowa kluczowe

EN

pearlitic steels; rails; controlled cooling; modelling; validation

• Wydawca: Wydawnictwa AGH
• Czasopismo: Computer Methods in Materials Science
• Rocznik: 2015
• Tom: Vol. 15, No.3
• Strony: 416--426
• Opis fizyczny: Bibliogr. 29 poz., rys.

Twórcy

autor

Smyk G.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Pernach M.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Ambroziński M.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

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