INVESTIGATION OF MICROSTRUCTURE AND MECHANICAL PROPERTIES PRODUCED BY USING THERMAL ANALYSIS IN THE PRODUCTION OF CAST IRON MATERIAL WITH VERMICULAR GRAPHITE

Yıl 2023, Cilt: 11 Sayı: 2, 542 - 548, 23.06.2023

Hasan Hasırcı

https://doi.org/10.29109/gujsc.1227029

Öz

In this study; microstructure and mechanical properties of Vermicular Graphite Cast Iron (VGCI) material in accordance with EURO6 standard were evaluated by using thermal analysis during the production of engine block. Production of this engine block was performed by ladle metallurgy method with a new production approach suitable for mass production in Erkunt Industry company. Thermal analysis technique was used during production as a production control tool. Samples taken from the block material produced were examined in order to analyze microstructural and mechanical properties. The study results showed that the engine block produced was liable to the standards in terms of chemical composition, structure and mechanical properties. It was determined that the conformity of the microstructure and mechanical properties to the targeted standards can be ensured by using thermal analysis technique. Some foreign (European countries) approvals have been obtained for the material produced.

Anahtar Kelimeler

Vermicular Graphitic Cast Iron (VGCI), EURO6 standard, Thermal analysis, Microstructure, Mechanical properties

Proje Numarası

20221/1

Kaynakça

• [1] Dong, J.P., Kim, H.G., and Park, Y. (2015). A Study of the oxidation of FeCrAl alloy in pressurized water and high-temperature steam environment, Corrosion Science, 94, 459-465. 10.1016/j.corsci.2015.02.027
• [2] Da, S. (2009). The Origin, Development and melting process of vermicular cast iron, Modern Cast Iron, 10, 20-26. Corpus ID: 137731482
• [3] Jiang, H. and Huang, Z.M. (2015). Experimental analysis of vermicular iron materials, Heat Treatment Technique 8, 12-24.
• [4] Karatay, B. (2019). Investigation of the change of mechanical properties and thermal conductivity of vermicular graphite cast iron depending on production conditions, Gazi University Institute of Science, Master's thesis, 25-30.
• [5] Davis, J. R. (1996). Cast Irons, ASM Speciality Handbook, ASM International.
• [6] Marcin, G., and Kawalec, M. (2013). Effects of Titanium Addition on Microstructure and Mechanical Properties of Thin-Walled Compacted Graphite Iron Castings, Journal of Materials Engineering and Performance, 22 (5), 1519-1524. 10.1007/s11665-012-0432-8
• [7] Hrusovsky, J. P. and Wallace, J. F. (1982). Effect of Composition on Solidification of Compacted Graphite Iron, AFS Transactions, 90, 55-72.
• [8] Murthy, V. S., Kishore and Seshan, S. (1985). Vermicular Graphite Cast Iron-Current State of the Art, Sadhana, 8(4), 361-372.
• [9] König, M. (2010). Literature review of microstructure formation in compacted graphite Iron, International Journal of Cast Metals Research, 23 (3), 185-192. 10.1179/136404609X12535244328378
• [10] Zych, J. and Żyrek, A. (2013). Vermicular cast iron production in the “Inmold” technology (in the Metalpol casting house) and the assessment of its thermal fatigue resistance, Archives of Foundry Engineering, 11 (3), 255–260.
• [11] Skaland, T. (2005). Understanding Ductile Iron Solidification by the Use of Thermal Analysis, Vestas Wind System A/S Windcast Group Kristiansand, Aalen Germany.
• [12] Udroıu, A. (2002). The Use of Thermal Analysis for Process Control of Ductile Iron, Seminarium, NovaCast.
• [13] Avcı, Y. (2005). Description of Casting Methods of Compact Graphite Cast Irons, Evaluation of Metallographic and Mechanical Properties, Master Thesis, Osmangazi University, Institute of Science and Technology, 63-65.
• [14] Elmabrouk, O. (2007). An Investigation of Compacted Graphite Iron Production by Means of Thermal Analysis Technique and Other Process Control Windows, Doctoral Thesis, Middle East Technical University, Institute of Science and Technology, 10-22.
• [15] Zhang, M.X., Pang, J.C., Meng, L.J., Li, S.X., Liu, Q.Y., Jiang, A.L., and Zhang, Z.F. (2021). Study on Thermal Fatigue Behaviors of Two Kinds of Vermicular Graphite Cast Irons, Materials Science & Engineering A, 814,141212. 10.1016/j.msea.2021.141212
• [16] Qiaoqin, G., Yang, Z., Tao, D., Peihu, G., Yongchun, G. and Jianping, L. (2018). Effects of vermicular graphite rate on the oxidation resistance and mechanical properties of vermicular graphite iron, Journal of Alloys and Compounds, 765, 213-220. 10.1016/j.jallcom.2018.06.236
• [17] Fragassa, C., Radovic, N., Pavlovic, A. and Minak, G. (2016). Comparison of Mechanical Properties in Compacted and Spheroidal Graphite Irons, Tribology in Industry, 38, 1, 45-56. 10.1179/136404604225017474