Inoculation of primary structure of pure aluminium

• Autorzy: Szajnar J. , Wróbel T.
• Konferencja: 12th International Scientific Conference CAM3S'2006, 27-30th November 2006, Gliwice-Zakopane
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main aim of studies was to determine common influences on EN AW-A199,5 structure refinement of reverse or impulse reverse magnetic field and small amount of inoculants sort AlTi5B1, AlZr5 and AlV10 - less than obligatory standard PN-EN 573-3 (concerning about aluminium purity). Design/methodology/approach: Factor variables of founding were: pulse frequency of magnetic field (f), magnetic induction (B), time of magnetic field action (t) and inoculant quantity (M). Degree of fineness was represented by equiaxed crystals zone content (SKR) on cylindrical castings cross-section of aluminium EN AW-Al 99,5, average area of equiaxed crystal (PKR) and average area of columnar crystal (PKK) were calculated by computer program to processing and image analysis after macroscopic metallographic research. Findings: The results of investigations and their analysis show, that contribution of these both mechanism models of additional crystal nucleuses formation i.e. magnetic field influence and introduction of small amount of inoculant - less than in conventional modification process, should result in higher degree of fineness in pure metals structure. It is not possible, when we use one of these methods. We must use these two methods together. Research limitations/implications: I further research, authors of this paper are going to identify the "washers" to heterogeneous nucleation, which influences on increase of size reduction in structure. Practical implications: The work presents refinement of structure methods which are particularly important in continuous and semi - continuous casting where products are used for plastic forming. Originality/value: The value of this paper resides in coupling of two fineness of structure methods. The first method is internal factor - inoculation with (Ti+B) and the second method is external factor - influence of electromagnetic field crystallization process.

Słowa kluczowe

EN

working properties; magnetic field; inoculation; aluminium

PL

właściwości użytkowe; pole magnetyczne; modyfikacja; aluminium

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 20, nr 1-2
• Strony: 283--286
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Szajnar J.

autor

Wróbel T.

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

Bibliografia

• [1] J. Szajnar, The columnar to equiaxed transition at casting solidification with convection forced by rotating magnetic field, Scientific book of Silesian University of Technology, Mechanic, 138, Gliwice, 2001 (in Polish).
• [2] E. Fraś, Crystallization of metals, WNT, Warszawa, 2003 (in Polish).
• [3] S. Jura, Modeling research of modification process in metals, Scientific book of Silesian University of Technology, Mechanic, 32, Gliwice, 1968 (in Polish).
• [4] J. Szajnar, The influence of rotating reversing magnetic field on solidification process of cast. Doctors thesis, Silesian University of Technology, Gliwice, 1986, (in Polish).
• [5] J. Szajnar, J. Gawroński, The influence of electromagnetic stirring of a flowing metal stream on the cast structure, Proceedings of the 1st International Scientific Сonference Achievements in Mechanical & Materials Engineering AMME, Gliwice, 1992, 183.
• [6] J. Szajnar, J. Gawroński: The influence of stirring liquid metal in mould by means of magnetic field on the structure and the characteristic of castings, Proceedings of the 2nd International Scientific Conference Achievements in Mechanical & Materials Engineering AMME, Gliwice, 1993, 209.
• [7] J. Szajnar, J. Gawroński, Effect of the magnetic field on the transformation of columnar structure of the castings, Foundry Review, vol. 55, No 4, 2005, p.232, (in Polish).
• [8] J. Szajnar, The columnar crystals shape and castings structure cast in magnetic field, Journal of Materials Processing Technology, 157-158, 2004, 761.
• [9] J. Szajnar, J. Gawroński, Method of aluminium and aluminium alloy casting. Patent PL nr 134 861, 5.03.1987 (in Polish).
• [10] J. Szajnar, M. Stawarz, Т. Wróbel, Influence оf impulse magnetic field reaction and inoculation with Ti + B addition on aluminium structure. Archives of foundry, N° 18(1/2), vol. 6, 2006 (in Polish).
• [11] J. Szajnar, T. Wróbel, Influence of magnetic field and inoculation on columnar structure transformation. Journal of Achievements in Materials and Manufacturing Engineering, vol. 17, 2006, 209.
• [12] J. Szajnar, M. Stawarz, Т. Wróbel, Inoculation of pure aluminium structure with Ti+B addition in impulse magnetic field. Journal of Achievements in Materials and Manufacturing Engineering, vol. 14, 2006, 64.
• [13] J. Szajnar, M. Stawarz, Т. Wróbel, Inoculation of pure aluminium structure with Ti + B addition in impulse magnetic field, The 11th International Scientific Сonference on the Contemporary Achievements in Mechanics, Manufacturing and Materials Science CAM3 S 2005, (on CD), nr 1.173.
• [14] J. Szajnar, T. Wróbel, Modification of pure aluminium structure by internal and external factors. Archives of foundry, No22, vol. 6, 2006 (in Polish).
• [15] Z. Poniewierski, Crystallization, structure and properties of silumines, WNT, Warszawa, 1989 (in Polish).