Effect of Technological Parameters on the AlSi12 Alloy Microstructure During Crystallization Under Pressure

• Autorzy: Pastirčák R.

Identyfikatory

DOI

10.1515/afe-2017-0054

• Języki publikacji: EN

Abstrakty

EN

The paper deals with the impact of technological parameters on the heat transfer coefficient and microstructure in AlSi12 alloy using squeeze casting technology. The casting with crystallization under pressure was used, specifically direct squeeze casting method. The goal was to affect crystallization by pressure with a value 100 and 150 MPa. The pressure applied to the melt causes a significant increase of the coefficient of heat transfer between the melt and the mold. There is an increase in heat flow by approximately 50% and the heat transfer coefficient of up to 100 fold, depending on the casting conditions. The change in cooling rate influences the morphology of the silicon particles and intermetallic phases. A change of excluded needles to a rod-shaped geometries with significantly shorter length occurs when used gravity casting method. By using the pressure of 150 MPa during the crystallization process, in the structure can be observed an irregular silica particles, but the size does not exceed 25 microns.

Słowa kluczowe

EN

squeeze casting; heat transfer; pressure; aluminium alloy

PL

wyciskanie; wymiana ciepła; nacisk; stop aluminium

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 2
• Strony: 75--78
• Opis fizyczny: Bibliogr. 5 poz., rys., tab., wykr.

Twórcy

autor

Pastirčák R.

• Department of Technological Engineering, University of Zilina , Univerzitna 1, 010 26 Zilina, Slovakia

Bibliografia

• [1] Aweda, J.O., Adeyemi, M.B. (2012). Experimental Determination of Heat Transfer Coefficients During Squeeze Casting of Aluminium. An Overview of Heat Transfer Phenomena. Dr M. Salim Newaz Kazi (Ed.). ISBN 978-953-51-0827-6. InTech. DOI: 10.5772/52038.
• [2] Ragan, E. et al. (2007). Casting of metals under pressure (Liatie kovov pod tlakom). Michal Vaško pub., 392. ISBN 978–80–8073–979–9.
• [3] Konar, R., Patek, M. & Zrak, A. (2015). Ultrasonic testing of non-ferrous materials in the foundry industry. Manufacturing Technology: journal for science, research and production. 15(4), 557-562. ISSN 1213-2489.
• [4] Vasková, I., Hrubovčáková, M., Malik, J. & Eperješi, Š. (2014). Influence of technological parameters of furane-mixtures on shrinkage creation in ductile cast iron castings. Archives of Metallurgy and Materials. 59(3), 1037-1040. DOI: 10.2478/amm-2014-0174.
• [5] Lee, J. H., Kim, H. S., Won, C. W. & Cantor, B. (2002). Effect of the gap distance on the cooling behavior and the microstructure of indirect squeeze cast and gravity die cast 5083 wrought Al alloy. Materials Science & Engineering A. 338(1-2), 182-190. Elsevier.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)