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Abstrakt

This paper presents the study about defects found in industrial high silicon ductile iron. The microstructures were analysed using an optical microscope. Afterwards, a scanning electron microscope was used to analyse the chemical composition.The study also examined the origin of oxygen and what is the amount of oxygen in the cast iron.The amount of active oxygen was measured at two production processes. Firstly, at the end of melting process, and secondly, after the nodularization treatment. The research was carried out with different proportions of the raw materials. The focus was on determining the mechanism of the formation of slag defects to eliminate them in order to obtain ductile iron with increased silicon content of the highest possible quality. The research presented in this publication is a part of an implementation doctorate carried out in the METALPOL Foundry in Węgierska Górka (Poland). The presented research concerns the elaboration of initial parameters of liquid metal intended for processing into high-silicon ductile cast iron SiMo1000 type with aluminum and chromium additives.
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Bibliografia

[1] Kopyciński, D. (2015). Shaping the structure and mechanical properties of cast iron intended for operation in difficult conditions of use (selected issues). Katowice-Gliwice: Monography. Archives of Foundry Engineering. (in Polish).
[2] Kleiner, S. & Track K. (2010). SiMo 1000 - Ein aluminium - legiertes gusseisen für Hochtemperatur-anwendungen. Giesserei. 97, 28-34.
[3] Papis, K., Tunziniand, S., Menk, W. (2014). Cast iron alloys for exhaust applications. In 10th International Symposium on the Science and Processing of Cast Iron - SPCI10, November 2014. Mar del Plata, Argentina.
[4] Öberg, Ch., Zhu, B. & Jonsson, S. (2017). Plastic deformation and creep of two ductile cast irons, SiMo51 and SiMo1000, during thermal cycling with large strain. Materials Science Forum. 925, 361-368. DOI: https://doi.org/10.4028/www.scientific.net/MSF.925.361.
[5] Guzik, E. (2001). Cast iron refining processes, selected issues. Katowice: Archiwum Odlewnictwa PAN. (in Polish).
[6] Collective work (2013). Foundry's guide. Kraków: STOP. 138-139. (in Polish).
[7] Keivan A. Kasvayee, & Ghasemali E. (2017). Characterization and modeling of the mechanical behavior of high silicon ductile iron. Material Science & Engineering A. 708, 159-170. DOI: https://doi.org/10.1016/j.msea.2017.09.115.
[8] Li, D., Perrin,. R., Burger, G., McFarlan, D., Black, B., Logan, R. & Williams, R. (2004). Solidification behavior, microstructure, mechanical properties, hot oxidation and thermal fatigue resistance of high silicon SiMo nodular cast irons. SAE International, Warrendale, 1-12. DOI: https://doi.org/10.4271/2004-01-0792.
[9] Muller, J., Wolf, G. (2001). Optimierte magnesiumdrahtinjektionstechnik zur herstellung von hochwertigem gusseisen mit kugelgraphit aus kupolofenbasiseisn. Giessereiforschung. 53(3), 85-103.
[10] Hampl, J. & Elbert, T. (2010). On modelling of the effect of oxygen on graphite morphology and properties of modified cast irons. Archives of Foundry Engineering. 10(4), 55-60.
[11] Mocek, J., Chojecki, A. (2009). Changes in the gas atmosphere of the casting mould during pouring iron alloys. In XXXIII Scientific Founder's Day Conference. Kraków. (in Polish).
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Autorzy i Afiliacje

Ł. Dyrlaga
1 2
D. Kopyciński
1
E. Guzik
1

  1. AGH University of Science and Technology, Department of Foundry Engineering, Al. Mickiewicza 30, 30-059 Kraków, Poland
  2. METALPOL Węgierska Górka ul. Kolejowa 6, 34-350 Węgierska Górka, Poland

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