The effect of boundary conditions of casting on the size of porosity of heavy steel ingot

• Autorzy: Tkadlečková M. , Michalek K. , Gryc K. , Smetana B. , Machovčák P. , Socha L.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents new knowledge from numerical modelling of porosity in heavy steel ingot using ProCAST software. The main aim of numerical modelling realized under the conditions of the Department of Metallurgy and Foundry and Regional Materials Science and Technology Centre at the VSB-TU Ostrava is the optimization of the production of heavy steel ingots produced at the companyVítkovice Heavy Machinery a.s. Design/methodology/approach: The selected method of numerical modelling enables 3D fully dimensional numerical simulation of steel casting and the subsequent solidification of steel with the possibility of prediction of ingot defects. Findings: The numerical modelling of casting and solidification of the 90 ton heavy steel ingot under different boundary conditions of the casting led to these main conclusions: In all simulated variants, the final character of solidification was very similar. The lowest level of porosities were achieved in the variant when we used the longer filling time together with decrease of casting temperatures. However, the tested adjustment of casting technology appeared to have only small impact on the resulting porosity. Practical implications: The change of geometry of the mould will have probably more effect on the character of the solidification than only the small changes of the casting parameters which are dependent on the steel grade. Originality/value: On the basis of applied research in close collaboration with industry companies, the obtained data can contribute significantly to optimization the operating conditions, thereby increasing the efficiency of the steelmaking technology and final quality of cast steel.

Słowa kluczowe

EN

casting; heavy steel ingot; modelling; porosity

PL

odlewnictwo; wlewki stalowe ciężkie; modelowanie; porowatość

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2013
• Tom: Vol. 56, nr 1
• Strony: 29--37
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Tkadlečková M.

• Department of Metallurgy and Foundry and Regional Materials Science and Technology Centre, VŠB - Technical University of Ostrava, 17. listopadu 15, 708-33 Ostrava-Poruba, Czech Republic

autor

Michalek K.

• Department of Metallurgy and Foundry and Regional Materials Science and Technology Centre, VŠB - Technical University of Ostrava, 17. listopadu 15, 708-33 Ostrava-Poruba, Czech Republic

autor

Gryc K.

• Department of Metallurgy and Foundry and Regional Materials Science and Technology Centre, VŠB - Technical University of Ostrava, 17. listopadu 15, 708-33 Ostrava-Poruba, Czech Republic

autor

Smetana B.

• Department of Physical Chemistry and Theory of Technological Processes and Regional Materials Science and Technology Centre, VŠB - Technical University of Ostrava, 17. listopadu 15, 708-33 Ostrava-Poruba, Czech Republic

autor

Machovčák P.

• Vítkovice Heavy Machinery a.s., Ruská 2887/101, 706-02 Ostrava-Vítkovice, Czech Republic

autor

Socha L.

• Department of Metallurgy and Foundry and Regional Materials Science and Technology Centre, VŠB - Technical University of Ostrava, 17. listopadu 15, 708-33 Ostrava-Poruba, Czech Republic

Bibliografia

• [1] M. Tkadlečková, K. Michalek, P. Klus, K. Gryc, V. Sikora, M. Kováč, Testing of numerical model settings for simulation of steel ingot casting and solidification, Proceedings of the 20th Anniversary International Conference on Metallurgy and Materials METAL’2011, Brno, 2011, 61-67.
• [2] K. Tashiro, S. Watanabe, I. Kitagawa, I. Tamura, Influence of mould design on the solidification and soundness of heavy forging ingots, ISIJ International 23 (1983) 312-321.
• [3] A. Kermanpus, M. Eskandari, H. Purmohamad, M.A. Soltani, B. Shateri, Influence of mould design on the solidification of heavy forging ingots of low alloy steels by numerical simulation, Materials and Design 31 (2010) 1096-1104.
• [4] O. Bogdan, Numerical analysis of casting technology and A-segregation prediction in AISI 4340 Forgings Products. Industrial Soft, Montreal, Canada, 2010, http://castingsnet.com/AISI4340-casting-report.pdf.
• [5] M. Kearney, M. Crabbe, J. Talamantes-Silva, Development and manufacture of large plate mill rolls, Ironmaking and Steelmaking 34/5 (2007) 380-383.
• [6] S. Baoguang, K. Xiuhong, L. Dianzhong, A novel technique for reducing macrosegregation in heavy steel ingots, Journal of Materials Processing Technology 210/4 (2010) 703-711.
• [7] A.N. Smirnov, The improving of the quality of the steel ingots using vibration with pulse exposure during their solidification, STAL 66/4 (1997) 14-20.
• [8] V.A. Efimov, A.S. Eldarchanov, A.S. Nuradinov, The effect of vibration on the structure and properties of ingot from steel 60, STAL 71/12 (2002) 15-17.
• [9] L.J. Nedeljkovic, V.L. Pilyushenko, A.N. Smirnov, Effect of pulsating stirring of liquid core on solidification of large steel ingots, Ironmaking Steelmaking 17/6 (1991) 414-423.
• [10] K. Janiszewski, Influence of slenderness ratios of a multi-hole ceramic filters at the effectiveness of process of filtration of non-metallic inclusions from liquid steel, Archives of metallurgy and Materials 57/1 (2012) 135-143.
• [11] L. Bulkowski, U. Galisz, H. Kania, Z. Kudlinski, J. Pieprzyca, J. Baranski, Industrial tests of steel filtering process, Archives of Metallurgy and Materials 57/1 (2012) 363-369.
• [12] P.G. Joensson, A. Tilliander, S. Yokoya, Z.A. Zhang, A numerical study of swirl blade effects in uphill teeming casting, ISIJ International 50/12 (2010) 1756-1762.
• [13] K. Michalek, K. Gryc, M. Tkadleckova, D. Bocek, Model study of tundish steel intermixing and operational verification, Archives of Metallurgy and Materials 57/41 (2012) 291-296.
• [14] K. Michalek, K. Gryc, J. Morávka, Physical Modelling of Bath Homogenisation in Argon Stirred Ladle, Metalurgija, 48/4 (2009) 215-218.
• [15] M. Kováč, Large castings - Ingot, ProCAST 2010, User Guide, 2011.
• [16] P. Machovčák, A. Opler, M. Tkadlečková, K. Michalek, K. Gryc, V. Krutiš, M. Kováč, The utilization of numerical modelling to optimize the production of heavy forging ingots in Vítkovice Heavy Machinery, Proceedings of the 1st International Conference on Ingot Casting, Rolling and Forging ICRF, Aachen, 2012.
• [17] B. Smetana, M. Žaludová, M. Tkadlečková, J. Dobrovská, S. Zlá, K. Gryc, P. Klus, K. Michalek, P. Machovčák, L. Řeháčková, Experimental verification of hematite ingot mould heat capacity and its direct utilisation in simulation of casting process. Journal of Thermal Analysis and Calorimetry 111 (2013) 1572-8943.
• [18] ProCAST User Guide 2009, ESI Group.
• [19] M. Tkadlečková, K. Gryc, P. Machovčák, P. Klus, K. Michalek, L. Socha, M. Kováč, Setting a numerical simulation of filling and solidification of heavy steel ingots based on real casting conditions. Materiali In Technologije. 46/4 (2012) 399-402.