Effect of Chromium on the Solidification Process and Microstructure of Vermicular Graphite Cast Iron

Open access

Abstract

The paper presents the results of studies of the effect of chromium concentration on the solidification process, microstructure and selected properties of cast iron with vermicular graphite. The vermicular graphite cast iron was obtained by an Inmold process. Studies covered the cast iron containing chromium in a concentration at which graphite is still able to preserve its vermicular form. The effect of chromium on the temperature of eutectic crystallization and on the temperature of the start and end of austenite transformation was discussed. The conditions under which, at a predetermined chromium concentration, the vermicular graphite cast iron of a pearlitic matrix is obtained were presented, and the limit concentration of chromium was calculated starting from which partial solidification of the cast iron in a metastable system takes place. The effect of chromium on the hardness of cast iron, microhardness of individual phases and surface fraction of carbides was disclosed.

[1] Founding – Compacted (vermicular) graphite cast irons PN-EN 16079:2012.

[2] Pietrowski, S. (2000). Compendium of knowledge about vermicular cast iron. Solidification of Metals and Alloys. 2(44), 279-292. (in Polish).

[3] Guzik, E. (2010). Structure and mechanical properties as well as application of high quality vermicular cast iron. Archives of Foundry Engineering. 10(3), 95-100.

[4] Guzik, E. & Dzik, S. (2009). Structure and mechanical properties of vermicular cast iron in cylinder head casting. Archives of Foundry Engineering. 9(1), 175-180.

[5] Górny, M., Kawalec, M. & Sikora, G. (2014). Effect of Cooling Rate on Microstructure of Thin-Walled Vermicular Graphite Iron Castings. Archives of Foundry Engineering. 14(spec. 1), 139-142.

[6] Górny, M. & Kawalec, M. (2013). Role of Titanium in Thin Wall Vermicular Graphite Iron Castings Production. Archives of Foundry Engineering. 13(2), 25-28.

[7] Laneri, K., Bruna, P. & Crespo, D. Microstructural characterization and kinetics modelling of vermicular cast irons. Retrieved May, 25. 2015 from http://arxiv.org/ftp/cond-mat/papers/0606/0606031.pdf.

[8] Guzik, E. & Kleingartner, T. (2009). A study on the structure and mechanical properties of vermicular cast iron with pearlitic-ferritic matrix. Archives of Foundry Engineering. 9(3), 55-60.

[9] Kopyciński, D., Guzik, E., Nowak, A., Ronduda, M. & Sokolnicki, M. (2012). Preparation Vermicular Graphite in Thin and Thick Wall Iron Castings. Archives of Foundry Engineering. 12(2), 41-44.

[10] Pietrowski, S. (1998). A mechanism of the vermicular graphite crystallization in cast iron. Solidification of Metals and Alloys. 37, 97-104. (in Polish).

[11] Soiński, M.S. & Mierzwa, P. (2011). Effectiveness of cast iron vermicularization including ‘conditioning’ of the alloy. Archives of Foundry Engineering. 11(2). 133-138.

[12] Zych, J. & Żyrek, A. (2011). 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(spec. 3), 255-260.

[13] Mierzwa, P. & Soiński, M.S. (2010). The effect of thermal treatment on the mechanical properties of vermicular cast iron. Archives of Foundry Engineering. 10(spec. 1), 133-138.

[14] Andrsova, Z. & Volesky, L. (2012). The Potential of Isothermally Hardened Iron wth Vermicular Graphite. CO-MAT 2012. 21.-22. 11. 2012. Plzeň, Czech Republic, EU. Retrieved May, 25. 2015 from http://www.comat.cz/files/-proceedings/11/reports/1060.pdf.

[15] García-Hinojosa, J.A., Amaro A.M., Márquez, V.J. & Ramírez-Argaez, M.A. (2007). Manufacturing of Carbide Austempered Vermicular Iron. METAL 2007. 22. – 24. 5. 2007 Hradec nad Moravicí. Retrieved May, 25. 2015 from http://konsyst.tanger.cz/files/proceedings/metal_07/Lists/Papers/120.pdf.

[16] Pytel, A. & Gazda, A. (2014). Evaluation of selected properties in austempered vermicular cast iron (AVCI). Transactions of Foundry Research Institute. LIV(4), 23-31. DOI: 10.7356/iod.2014.18.

[17] Soiński, M.S. & Jakubus, A. (2014). Initial Assessment of Abrasive Wear Resistance of Austempered Cast Iron with Vermicular Graphite. Archives of Metallurgy and Materials. 59(3), 1073-1076. DOI: 10.2478/amm-2014-0183.

[18] Pietrowski, S. (1998). Alloyed Cast Iron with Vermicular Graphite. Solidification of Metals and Alloys. 37, 105-111. (in Polish).

[19] Choong-Hwan, L. & Byeong-Choon, G. (2011). Development of Compacted Vermicular Graphite Cast Iron for Railway Brake Discs. Met. Mater. Int. 17(2), 199-205.

[20] Popov, P.I. & Sizov, I.G. (2006). Effect of Alloying Elements on the Structure and Properties of Iron with Vermicular Graphite. Metal Science and Heat Treatment. 48(5-6), 272-275.

[21] Rapiejko, C., Pisarek, B., Czekaj, E. & Pacyniak, T. (2014). Analysis of the Crystallization of AZ91 Alloy by Thermal and Derivative Analysis Method Intensively Cooled in Ceramic Shell. Archives of Foundry Engineering. 14(1), 97-102.

[22] Pietrowski, S., Pisarek, B., Władysiak, R., Gumienny, G. & Szymczak, T. (2009). TDA curves of metals alloys and the control of their quality. In Szajnar J. Advances in Theory and Practice Foundry. (pp. 345-377). Katowice – Gliwice: PAN. (in Polish).

[23] Pisarek, B.P. (2013). Model of Cu-Al-Fe-Ni Bronze Crystallisation. Archives of Foundry Engineering. 13(3), 72-79.

[24] Kacprzyk, B., Szymczak, T., Gumienny, G. & Klimek, L. (2013). Effect of the Remelting on Transformations in Co-Cr-Mo Prosthetics Alloy. Archives of Foundry Engineering. 13(3), 47-50.

[25] Dobrzański, L.A. (2004). Metal engineering materials. Warsaw: WNT. (in Polish).

Archives of Foundry Engineering

The Journal of Polish Academy of Sciences

Journal Information


CiteScore 2016: 0.42

SCImago Journal Rank (SJR) 2016: 0.192
Source Normalized Impact per Paper (SNIP) 2016: 0.316

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 212 207 28
PDF Downloads 97 95 20