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Abstrakty
High-vanadium cast iron is a type of white cast iron, in which a regular fibrous γ + VC eutectic with about 20 vol.% of vanadium carbides crystallises. The paper presents the results of research during which the high-vanadium cast iron was subjected to spheroidisation treatment with magnesium Elmag 5800 master alloy. The purpose of this operation was to obtain the VC carbides of a spheroidal shape. The study also included metallographic examinations and testing of mechanical properties carried out on high-vanadium cast iron of a eutectic composition in as-cast condition and after the spheroidising treatment. The attempt to spheroidise the vanadium carbides has proved to be quite successful. The introduction of magnesium alloy has made nearly one half of the crystallised vanadium carbides acquire a spheroidal shape. The, obtained in this way, high-vanadium cast iron with vanadium carbides of a spheroidal shape showed very high mechanical and plastic properties. The tensile strength Rm increased by 60% compared to the as-cast alloy, while ductility increased more than twenty times. The presented results are based on the initial trials, but further studies of this new material are planned, mainly to check its resistance to abrasion, to impacts and corrosion. Tests are also planned to increase the fraction of spheroidal carbides and measure the effect of their content on the mechanical and tribological properties.
Czasopismo
Rocznik
Strony
111--116
Opis fizyczny
Bibliogr. 21 poz., rys., tab., wykr.
Twórcy
autor
- AGH University of Science and Technology, ul. Reymonta 23, 30-059 Cracow, Poland
Bibliografia
- [1] E. Guzik: Procesy uszlachetniania żeliwa wybrane zagadnienia, Archiwum Odlewnictwa, PAN, Katowice (2001).
- [2] M. Kawalec, E. Fraś: Wpływ wanadu na kształtowanie struktury żeliwa, Archiwum Odlewnictwa, 6(2006), Nr 18 (2/2), s. 57-64.
- [3] M. Kawalec, E. Fraś: Wpływ krzemu na strukturę żeliwa wysokowanadowego, Archiwum Odlewnictwa, 6(2006), Nr 21 (1/2) s. 389-394.
- [4] M. Kawalec, E. Fraś: „Wpływ wanadu na własności wytrzymałościowe żeliwa”. Archiwum Odlewnictwa, 6(2006), Nr 21 (1/2) s. 395-400.
- [5] M. Kawalec, E. Fraś: Mikrostruktura żeliwa o wysokiej zawartości wanadu, XXXIV Szkoła Inżynierii Materiałowej Kraków – Krynica, wrzesień 2006, s. 87-92.
- [6] M. Kawalec, E. Fraś: Wpływ krzemu na własności wytrzymałościowe żeliwa wysokowanadowego, XXXIV Szkoła Inżynierii Materiałowej Kraków – Krynica, wrzesień 2006, s. 93-98.
- [7] M. Kawalec, E. Fraś: Właściwości wytrzymałościowe żeliwa wysokowanadowego z dodatkiem krzemu, XXX Konferencja Naukowa z okazji Święta Odlewnika, Kraków, listopad 2006.
- [8] M. Kawalec, E. Fraś: Structure, Mechanical Properties and Wear Resistance of Highvanadium Cast Iron, ISIJ International, Vol. 48 (2008), No. 4, pp. 518-524.
- [9] E. Fraś, M. Kawalec: Struktura, właściwości mechaniczne i odporność na zużycie ścierne stopów Fe-C-V, Inżynieria Materiałowa, Rok XXIX, Nr 2/2008, s. 78-85.
- [10] E. Fraś, M. Kawalec, H.F. Lopez: Solidification microstructures and mechanical properties of high-vanadium Fe-C-V and Fe-C-V-Si alloys, Materials Science and Engineering A, 524 (2009), pp. 193-203.
- [11] Fraś E., Kawalec M.: Effect of silicon on the structure and mechanical properties of high-vanadium cast iron, Archives of Foundry Engineering, vol. 9, Issue 3/2009, pp. 231-234.
- [12] M. Kawalec, E. Fraś: Abrasive wear resistance of high-vanadium cast iron. Archives of Foundry Engineering, vol. 9, Issue 4/2009, pp. 103-108.
- [13] Fraś E., Kawalec M., H.F. Lopez: Solidification microstructures and mechanical properties of high-vanadium Fe-C-V and Fe-C-V-Si alloys, International Foundry Research/Giessereiforschung 62 (2010) No. 2, pp. 2-13.
- [14] M. Kawalec, E. Fraś: Shaping of the microstructure in near-eutectic Fe-C-V alloys, Archives of Foundry Engineering, Vol. 10, Issue 4/2010, pp. 83-88.
- [15] Kopyciński D.: Inoculation of chromium white cast iron. ISSN 1897-3310. Archives of Foundry Engineering 2009, v. 9, s. 191-194.
- [16] Kopyciński D.: Analysis of the structure of castings made from chromium white cast iron resistant to abrasive wear. ISSN 1897-3310. Archives of Foundry Engineering 2009, v. 9, issue 4, s. 109-112.
- [17] Kopyciński D., Guzik E., Piasny S.: The structure of abrasion-resisting castings made of chromium cast iron. ISSN 1897-3310. Archives of Foundry Engineering 2011, v. 11, s. 61–66.
- [18] Y. Uematsu, K. Tokaji, T. Horie, K. Nishigaki: Fracture toughness and fatigue crack propagation in cast irons with spheroidal vanadium carbides dispersed within martensitic matrix microstructure, Materials Science and Technology A, vol. 471 (2007), pp. 15-21.
- [19] K. Tokaji, T. Horie, Y. Enomoto: Effect of microstructure and carbide spheroidization on fatigue behaviour in high V-Cr-Ni cast irons, International Journal of Fatigue, vol. 28 (2006), pp. 281-288.
- [20] M. Tanaka, K. Shimizu, D. Ito, T. Noguchi: Fatigue Characteristic of Spheroidal Vanadium Carbides Cast Iron, Key Engineering Materials, vol. 457 (2011), pp. 279-284.
- [21] S. Nishiuchi, S. Yamamoto, T. Tanabe, T. Kitsudo, H. Matsumoto, Y. Kawano: Development of Stainless Spheroidal Carbide (VC) Cast Iron, Transaction of the American Foundry Society, 2003, pp. 831-844.
Typ dokumentu
Bibliografia
Identyfikator YADDA
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