Influence of electromagnetic field on pure metals and alloys structure

• Autorzy: Szajnar J. , Stawarz M. , Wróbel T. , Sebzda W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The first aim of investigations was the reduction of grain size and unification of structure for pure Al casting by introduction of small amount of inoculant (less than obligatory standard PN-EN 573-3, which concerning about aluminium purity) and with electromagnetic field. The second aim was to determination of electromagnetic field influence on morphology of graphite in cast iron ingots, which were poured with variable founding parameters. Design/methodology/approach: To investigations of pure Al and grey cast iron were used two types of rotate electromagnetic field i.e. without reversion (WPM) and with reversion and with a pause between following changes of electromagnetic field direction (IRPM). Findings: The results of investigations and their analysis show possibility of effective inoculation of pure aluminium structure by use of influencing of stirring electromagnetic field into metal during solidification and inoculation by introducing AlTi5B1 inoculant into liquid aluminium. Moreover results of studies show advantageous influence of electromagnetic field on graphite morphology. Research limitations/implications: In further researches, authors of this paper are going to apply his method of inoculation in industrial tests. Practical implications: The work presents a method of structure refinement which is particularly important in continuous and semi – continuous casting. In pure metals large columnar crystals zone result in forces extrusion rate reduction and during the ingot rolling delamination of external layers can occur. Thus, in some cases ingot skinning is needed, which rises the production costs. Whereas morphology of graphite in cast iron ingots for automobile industry is very important in viewpoint of wear resistance. Originality/value: Contributes to research on size reduction in pure metals structure and forming of graphite in cast iron.

Słowa kluczowe

EN

casting; aluminium; cast iron; electromagnetic field

PL

odlewnictwo; aluminium; żeliwo; pole elektromagnetyczne

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 34, nr 1
• Strony: 95--102
• Opis fizyczny: Bibliogr. 15 poz., rys., tabl.

Twórcy

autor

Szajnar J.

autor

Stawarz M.

autor

Wróbel T.

autor

Sebzda W.

• Division of Foundry, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Towarowa 7, 44-100 Gliwice, Poland,

Bibliografia

• [1] K. Miyazawa, Continuous casting of steels in Japan, Science and Technology of Advanced Materials 2 (2001) 59-64.
• [2] R. Sikora, Theory of electromagnetic field, WNT, Warsaw, 1998, (in Polish).
• [3] S. Asai, Recent development and prospect of electroma-gnetic processing of materials, Science and Technology of Advanced Materials 1 (2000) 191-196.
• [4] J. Szajnar, T. Wróbel, Inoculation of pure aluminium aided by electromagnetic field, Archives of Foundry Engineering 8 (2008) 123-132.
• [5] J. Szajnar, M. Stawarz, T. Wróbel, The influence of external factors on morphology of graphite in grey cast iron, Archives of Foundry Engineering 3 (2008) 159-162.
• [6] J. Szajnar, T. Wróbel, Methods of inoculation of pure aluminium structure, Journal of Achievements in Materials and Manufacturing Engineering 27/1 (2008) 95-98.
• [7] J. Szajnar, T. Wróbel, Influence of magnetic field and inoculation on size reduction in pure aluminium structrure, International Journal of Materials and Product Technology 3 (2008) 322-334.
• [8] E. Fraś, Crystallization of metals, WNT, Warsaw, 2003, (in Polish).
• [9] P. Gillon, Uses of intense d.c. magnetic fields in materials processing, Materials Science and Engineering 287 (2000) 146-151.
• [10] S. Pietrowski, Complex silumins, Journal of Achievements in Materials and Manufacturing Engineering 24/1 (2007) 101-105.
• [11] M. Robert, E. Zoqui, F. Tanabe, T. Motegi, Producing thixotropic semi-solid A356 alloy: microstructure formation x forming behaviour, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 19-26.
• [12] M. Kciuk, Structure, mechanical properties and corrosion resistance of AlMg5 alloy, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 185-188.
• [13] C. Vives, R. Ricou, Experimental study of continuous electromagnetic casting of aluminium alloys, Metallurgical Transactions 16B (1985) 377-384.
• [14] H. Harada, E. Takeuchi, M. Zeze, H. Tanaka, MHD analysis in hydromagnetic casting process of clad steel slabs, Applied Mathematical Modeling 23 (1998) 873-880.
• [15] S. Guo, J. Cui, Q. Le, Z. Zhao, The effect of alternating magnetic field on the process of semi-continuous casting for AZ91 billets, Materials Letters 59 (2005) 184-189.