Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30135
Influence of Raw Material Composition on Microstructure and Mechanical Properties of Nodular Cast Iron

Authors: Alan Vaško, Juraj Belan, Lenka Hurtalová, Eva Tillová

Abstract:

The aim of this study is to evaluate the influence of raw material composition on the microstructure, mechanical and fatigue properties and micromechanisms of failure of nodular cast iron. In order to evaluate the influence of charge composition, the structural analysis, mechanical and fatigue tests and microfractographic analysis were carried out on specimens of ten melts with different charge compositions. The basic charge of individual melts was formed by different ratio of pig iron and steel scrap and by different additive for regulation of chemical composition (silicon carbide or ferrosilicon). The results show differences in mechanical and fatigue properties, which are connected with the microstructure. SiC additive positively influences microstructure. Consequently, mechanical and fatigue properties of nodular cast iron are improved, especially in the melts with higher ratio of steel scrap in the charge.

Keywords: Nodular cast iron, silicon carbide, microstructure, mechanical properties.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1123675

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1042

References:


[1] R. Konečná, V. Konstantová, and G. Nicoletto, “Sizing of defects and fatigue behavior of nitrided nodular cast irons,” Materials Science (Medžiagotyra), vol. 14, pp. 215-220, 2008.
[2] P. Skočovský, and T. Podrábský, Graphitic cast irons. Žilina: EDIS, 2005.
[3] T. Benecke, S. Venkateswaran, W.D. Schubert, and B. Lux, “Investigation of the influence of silicon carbide in the production of ductile cast iron,” Foundryman, vol. 87, pp. 355-360, October 1994.
[4] R. Gerhardt, Properties and applications of silicon carbide. Rijeka: InTech, 2011.
[5] K.W. Copi, Y.S. Lerner, and N.S. Laukhin, “SiC vs. 75% FeSi: Comparing pre-inoculation effects,” Modern Casting, vol. 93, pp. 29-31, April 2003.
[6] W.H. Zhang, J. Ding, and F.R. Nie, “SiC inoculation pretreatment of cast iron,” Zhuzao/Foundry, vol. 58, pp. 279-281, March 2009.
[7] P. Skočovský, and A. Vaško, Quantitative evaluation of structure of cast irons. Žilina: EDIS, 2007.
[8] A. Vaško, and P. Skočovský, Properties and using of metal materials. Žilina: EDIS, 2014.
[9] O. Bokůvka, G. Nicoletto, M. Guagliano, L. Kunz, P. Palček, F. Nový, Fatigue of materials at low and high frequency loading. Žilina: EDIS, 2014.
[10] M. Sága, P. Kopas, and M. Uhríčik, “Modeling and experimental analysis of the aluminium alloy fatigue damage in the case of bending-torsion loading,” Procedia Engineering, vol. 48, pp. 599-606, 2012.
[11] M. Vaško, and M. Sága, “Application of fuzzy structural analysis for damage prediction considering uncertain S/N curve,” Applied Mechanics and Materials, vol. 420, pp. 21-29, 2013.
[12] R. Konečná, and B. Hadzimová, “Microfractography of nodular cast iron,” Transactions of Famena, vol. 26, pp. 59-65, 2002.