Modelling of the DP and TRIP micro-structure in the CMnAlSi automotive steel

• Autorzy: Lis A. K. , Gajda B.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The CMnAlSi steel is a new grade of TRIP steels with 1wt % of Al and Si. It is important to determine the usability of the CMnAlSi for production of sheets for automotive applications. Design/methodology/approach: The effect of cooling rate and austenitization temperature on phase transformations was investigated. The dilatometric experiments of the steel were done for the full austenitization temperature 1200°C, and for (α+γ) temperature ranges: 1100°C, 1000°C, 900°C and 800°C. Steel was also processed to achieve TRIP grade by continuous annealing with modeled vertical hot dip galvanizing line. The microstructures were investigated by light optical microscopy and SEM with EDX attachment. The amount of retained austenite in the obtained microstructures was investigated with X-ray diffraction. Findings: There is possibility to produce “dual-phase” CMnAlSi steel grade with controlled rolling at finishing temperature below 900°C to 800°C and fast cooling. Steel CMnAlSi is well suited for production of TRIP grade via heating cycle which correspond to vertical hot dip galvanizing process. Practical implications: This steel is suitable for production of automotive applications. Originality/value: The new procedure of control rolling from the (α+γ) temperature range of CMnAlSi steel was presented.

Słowa kluczowe

EN

automotive steel; CCT; SEM; scanning electron microscopy; TRIP; transformation induced plasticity; HDG

PL

stal samochodowa; CCT; SEM; skaningowa mikroskopia elektronowa; TRIP; plastyczność indukowana transformacją; linia HDG; cynkowanie ogniowe

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 15, nr 1-2
• Strony: 127--134
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Lis A. K.

• Institute of Materials Egineering; Faculty of Materials Processing Technology and Applied Physics, Czestochowa University of Technology, Al. Krajowej 19, 42-200 Czestochowa, Poland

autor

Gajda B.

• Institute of Materials Egineering; Faculty of Materials Processing Technology and Applied Physics, Czestochowa University of Technology, Al. Krajowej 19, 42-200 Czestochowa, Poland

Bibliografia

• [1] B. Ehrhardt, T. Gerber, H. Hofmann, T.W. Schaumann. Steel Grips 2 No. 4 (2004) 247-255.
• [2] D. Mahieu, L. van Dooren, B.C. Barbe, B.C. De Cooman. Steel Research 73 No. 6+7 (2002) 267-273.
• [3] A. K. Lis; B. Gajda. Inżynieria Materiałowa nr 5 (147) XXVI (2005) 597-600.
• [4] A.K. Lis, W. Gliński, J. Lis. Proceedings 12th International Scientific Conference “Achievements In Mechanical & Matreials Engineering, Gliwice-Zakopane, AMME’2003, (2003) 609-612.
• [5] J. Adamczyk, A. Grajcar. 11th International Scientific Conference on Contemporary Achievements in Mechanics, Manufacturing and Materials Science, Zakopane (2005) 1-6
• [6] J.Lis, B.Gajda, A.K. Lis. Proceedings 12th International Scientific Conference “Achievements In Mechanical & Matreials Engineering, Gliwice-Zakopane, AMME’2003, (2003) 605-608.
• [7] A.K. Lis, B.Gajda. 11th International Scientific Conference on Contemporary Achievements in Mechanics, Manufacturing and Materials Science, Zakopane (2005) 585-591.
• [8] E. Girault, A. Martens, P. Jacques, Y. Houbaert, B. Verlinden, J. van Humbeeck. Scripta Materialia 44 (2001) 885-892.
• [9] O.A. Girina, N.M. Fonstein: Developments in Sheet Products for Automotive Applications. Materials Science & Technology (2005) 65-76.
• [10] P. Maynier, J. Dollet, P. Bastien, D.V. Doane, J.S. Kirkaldy, [eds.:] AIME, New York, NY (1978) 518.
• [11] O. Muransky, P. Hornak, P. Lukas, J. Zrnik, P. Sittner. 11th International Scientific Conference on Contemporary Achievements in Mechanics, Manufacturing and Materials Science, Zakopane (2005) 694-697.