Effect of Cr and W on the Crystallization Process, the Microstructure and Properties of Hypoeutectic Silumin to Pressure Die Casting

• Autorzy: Szymczak T. , Gumienny G. , Pacyniak T.

Identyfikatory

DOI

10.1515/afe-2016-0060

• Języki publikacji: EN

Abstrakty

EN

This article presents the results of studies in the hypoeutectic silumin destined for pressure die casting with the simultaneous addition of chromium and tungsten. The study involved the derivative and thermal analysis of the crystallization process, metallographic analysis and mechanical properties testing. Silumin 226 grade was destined for studies. It is a typical silumin to pressure die casting. AlCr15 and AlW8 preliminary alloys were added to silumin. Its quantity allowed to obtain 0.1, 0.2, 0.3 and 0.4% of Cr and W in the tested alloy. Studies of the crystallization process as well as the microstructure of the silumin poured into DTA sampler allowed to state the presence of additional phase containing 0.2% or more Cr and W. It has not occurred in silumin without the addition of above mentioned elements. It is probably the intermetallic phase containing Cr and W. DTA studies have shown this phase crystallizes at a higher temperature range than α (Al) solid solution. In the microstructure of each pressure die casting containing Cr and W the new phases formed. Mechanical properties tests have shown Cr and W additives in silumin in an appropriate amount may increase its tensile strength Rm (about 11%), the yield strength Rp0.2 (about 21%) and to a small extent elongation A.

Słowa kluczowe

EN

theory of crystallization; innovative foundry; innovative foundry materials; pressure die casting; multicomponent silumin; DTA method

PL

teoria krystalizacji; innowacyjna odlewnia; innowacyjne materiały odlewnicze; odlewnictwo ciśnieniowe; siluminy; metoda DTA

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 3
• Strony: 109--114
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Szymczak T.

• Lodz University of Technology, Department of Materials Engineering and Production Systems, Stefanowskiego 1/15 Street, 90-924 Łódź, Poland

autor

Gumienny G.

• Lodz University of Technology, Department of Materials Engineering and Production Systems, Stefanowskiego 1/15 Street, 90-924 Łódź, Poland

autor

Pacyniak T.

• Lodz University of Technology, Department of Materials Engineering and Production Systems, Stefanowskiego 1/15 Street, 90-924 Łódź, Poland

Bibliografia

• [1] Szymczak, T., Gumienny, G., Walas, K. & Pacyniak, T. (2015). Effect of Tungsten and Molybdenum on the Crystallization, Microstructure and Properties of Silumin 226. Archives of Foundry Engineering. 15(3), 61-66.
• [2] Władysiak, R. & Kozuń, A. (2015). Structure of AlSi20 Alloy in Heat Treated Die Casting. Archives of Foundry Engineering. 15(1), 113-118.
• [3] Pietrowski, S. (2001). Silumins. Łódź: Publishing house of Lodz University of Technology.
• [4] Piątkowski, J. (2013). Influence of overheating temperature on the shape of primary silicon crystals in hypereutectic Al-Si cast alloy. Solid State Phenomena. 203-204, 417-422.
• [5] Wróbel, T. & Szajnar, J. (2013). Modification of pure Al and AlSi2 alloy primary structure with use of electromagnetic stirring method. Archives of Metallurgy and Materials. 58(3), 941-944.
• [6] Binczyk, F. & Piątkowski, J. (2003). Crystallization of AlSi17 silumin with additive of Cr, Co and Ti. Archives of Foundry, 3(9), 39-44. (in Polish).
• [7] Sahoo, K.L. & Pathak, B.N. (2009). Solidification behaviour, microstructure and mechanical properties of high Fe-containing Al–Si–V alloys. Journal of Materials Processing Technology. 209, 798-804.
• [8] Sahoo, K.L., Das, S.K. & Murty B.S. (2003). Formation of novel microstructures in conventionally cast Al-Fe-V-Si alloys. Materials Science and Engineering. 355(1-2), 193-200.
• [9] Pietrowski, S., Władysiak, R., Pisarek, B. (1999). Crystallization, structure and properties of silumins with cobalt, chromium, molybdenum and tungsten admixtures. In International Conference Light Alloys and Composites, 13-16 May 1999 (77-83).
• [10] Pietrowski, S., Władysiak, R. & Pisarek, B. (1998). Eutectic silumin with an additions of Cr, Mo, W, and Co. Solidification of metals and alloys. 13, 103-108.
• [11] Pietrowski, S. & Szymczak, T. (2009). Silumins alloy crystallization. Archives of Foundry Engineering. 9(3), 143-158.
• [12] Pietrowski, S., Szymczak, T., Siemińska-Jankowska, B. & Jankowski, A. (2010). Selected characteristic of silumins with additives of Ni, Cu, Cr, Mo, W and V. Archives of Foundry Engineering. 10(2), 107-126.
• [13] Pietrowski, S. & Szymczak, T. (2010). Modification of silumins with an alloying elements. In S. Pietrowski (Eds.), Tendencies of Optimization of the Production System in Foundries. 277-290. Katowice-Gliwice: Polish Academy of Sciences, Foundry Commission. (in Polish).
• [14] Szymczak, T., Gumienny, G. & Pacyniak, T. (2015). Effect of tungsten on the solidification process, microstructure and properties of silumin 226. Transactions of the Foundry Research Institute. 55(3), 3-14.
• [15] Szymczak, T., Gumienny, G. & Pacyniak, T. (2015). Effect of Vanadium and Molybdenum on the Crystallization, Microstructure and Properties of Hypoeutectic Silumin. Archives of Foundry Engineering. 15(4), 81-86.
• [16] Okamoto, H. (2008). Al-Cr (Aluminum-Chromium). Journal of Phase Equilibria and Diffusion. 29(1), 111-112. DOI: 10.1007/s11669-007-9225-4
• [17] Alloy Phase Diagrams. ASM Handbook Vol. 3. 1992.
• [18] Nagender Naidu, S.V., Sriramamurthy, A.M. & Rama Rao, P. (1984). The Cr-W (Chromium-Tungsten) System. Bulletin of Alloy Phase Diagrams. 5(3), 289-292.
• [19] Pietrowski, S., Pisarek, B., Władysiak, R., Gumienny, G. & Szymczak, T. (2009). TDA curves of metals alloys and the control of their quality. In Szajnar J. Advances In Theory and Practice Foundry, 345-377, Katowice – Gliwice, PAN. (in Polish).
• [20] Pisarek, B.P. (2013). Model of Cu-Al-Fe-Ni Bronze Crystalization. Archives of Foundry Engineering. 13(3), 72-79.
• [21] Rapiejko, C., Pisarek, B., Czekaj, E. & Pacyniak, T. (2014). Analysis of the Crystallization of AZ91 Alloy by Thermal and Derivative Analysis Method Intensively Cooled in Ceramic Shell. Archives of Foundry Engineering. 14(1), 97-102.
• [22] Kacprzyk, B., Szymczak, T., Gumienny, G. & Klimek, L. (2013). Effect of the Remelting on Transformations in Co-Cr-Mo Prosthetics Alloy. Archives of Foundry Engineering. 13(3). 47-50.
• [23] PN-EN 1706:2011. Aluminum and aluminum alloys. Castings. The chemical composition and mechanical properties. (in Polish).

Uwagi

PL

Opracowane ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.