Fast algorithms for phase transformations in dual phase steels on a hot strip mill run-out table (ROT)

• Autorzy: Suwanpinij P. , Prahl U. , Bleck W. , Kawalla R.
• Języki publikacji: EN

Abstrakty

EN

The hot rolling of dual phase steel, alloyed with 0.064% C, 0.05% Al, 0.48% Cr, 0.93% Mn, and 0.41% Si, was simulated by a deformation dilatometer. To model the ferrite transformation behaviour on the run-out table, the rate law approach proposed by Leblond and Devaux was employed. It models the ferrite transformation kinetics as a function of holding temperature and austenite conditioning, which is achieved by varying the austenite grain size and retained strain. Its transformation kinetics during cooling to the coiling temperature was investigated by varying the carbon content of the remaining austenite. The martensite transformation kinetics was also modelled by Leblond and Devaux's approach with a parameter coupled to the Koistinen–Marburger model. The modelling shows that this alloying concept allows a large process window for both temperature and austenite grain size. Finally, a selected set of processing parameters was chosen and transferred to a pilot rolling mill. The mechanical properties of the rolled sheets are satisfactory.

Słowa kluczowe

EN

hot rolling; dual phase steel; phase transformation

PL

walcowanie na gorąco; stal dwufazowa; przemiany fazowe

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2012
• Tom: Vol. 12, no. 3
• Strony: 305--311
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Suwanpinij P.

• Department of Ferrous Metallurgy, RWTH Aachen University, Intzestrasse1, 52072 Aachen, Germany

autor

Prahl U.

• Department of Ferrous Metallurgy, RWTH Aachen University, Intzestrasse1, 52072 Aachen, Germany

autor

Bleck W.

• Department of Ferrous Metallurgy, RWTH Aachen University, Intzestrasse1, 52072 Aachen, Germany

autor

Kawalla R.

• Institute of Metal Forming, TUB ergakademie Freiberg, Bernhard-von-Cotta-Straße 4, Freiberg 09596, Germany

Bibliografia

• [1] W. Bleck, S. Papaefthymiou, A. Frehn, Steel Research International 75 (11) (2004) 704–710.
• [2] A.T. Davenport (Ed.), Metallurgical Society of AIME, 1979.
• [3] R.A. Kot, B.L. Bramfitt (Eds.), Metallurgical Society of AIME, 1981.
• [4] R.A. Kot, J.W. Morris (Eds.), Metallurgical Society of AIME, 1979.
• [5] P. Suwanpinij, D. Yan, U. Prahl, W. Bleck, Steel Research International 83 (2012), submitted for publication.
• [6] F.Boratto,S.Yue,J.J.Jonas,T.H.Lawrence,Designofschedules for the production of high strength microalloyed steel strip in a hot stickle mill, Proc. Thermec’88, ISIJ 1 (1988) 383–390.
• [7] I. Tamura, et al., Thermomechanical processing of high-strength low-alloy steels, Butterworths 129 (210) (1988) 31–32.
• [8] D. Liu, F. Fazeli, M. Militzer, ISIJ International 47 (12) (2007) 1789–1798.
• [9] W.P. Sun, M. Militzer, E.B. Hawbolt, T.R. Meadowcroft, Transactions of ISS 25 (5) (1998) 85–94.
• [10] T. Kvackaj, I. Mamuzic, ISIJ International 38 (11) (1998) 1270–1276.
• [11] J.B. Leblond, G. Mottet, J. Devaux, J.C. Devaux, Materials Science and Technology 1 (1985) 815–822.
• [12] D. Koistinen, R. Marburger, Acta Metallurgica 7 (1959) 59–60.
• [13] U. Lorenz, Anwendung von Werkstoffmodellen auf die Phasenumwandlung und die Austenitkonditionierung von Stahlen, Dissertation, RWTH Aachen, 2003.