Detectability of Defect and its Beginning on the Formed Cast-iron Cast

• Autorzy: Kantoriková E.

Identyfikatory

DOI

10.24425/afe.2019.127119

• Języki publikacji: EN

Abstrakty

EN

The article describes the detection of a defect in a cast iron casting. It analyzes the cause of the crack in the Turbine Component casting. In this article, we are focusing on a particular turbine casting that is commonly used in automobiles as one of the components for turbochargers. The turbine is a casting made of ductile cast iron with a visible crack on the naked eye. The formation of cracks in castings is a common but undesirable phenomenon in the foundry practice. It is important to identify the errors, but also to know the cause of defects in castings. The solution is a detailed error analysis. In this paper I used metallographic analysis and magnetic powder method. The crack formation is due to tension in the casting, which results in tensile, shear, or shear forces. The crack formation kinetics is difficult because it is still very low during hardening and shortly after the casting is overloaded. The crack is most often due to core resistance or shrinkage molds that begin after the surface layer is tightened when the strength of the material is negligible to the end of the crystallisation.

Słowa kluczowe

EN

ductile cast iron; defect; casting; turbine component

PL

żeliwo sferoidalne; wada; odlew; element turbiny

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2019
• Tom: iss. 2
• Strony: 75--78
• Opis fizyczny: Bibliogr. 9 poz., fot., rys., tab.

Twórcy

autor

Kantoriková E.

• University of Žilina, Department of Technological Engineering, Žilina, Slovakia

Bibliografia

• [1] Trytek, A., Orłowicz, A.W., Tupaj, M., Mróz, M., Markowska, O., Bąk, G., Abram, T. (2016). The Effect of a Thin-Wall Casting Mould Cavity Filling Conditions on the Casting Surface Quality. Archives of Foundry Engineering. 16(4), 222-226.
• [2] Hajkowski, J., Roquet, P., Khamashta, M., Codina, E., Ignaszak, Z. (2014). Validation Tests of Prediction Modules of Shrinkage Defects in Cast Iron Sample. Archives of Foundry Engineering. 17(1), 57-66.
• [3] Revue (2014). https://automix.centrum.sk/revue/830315/ako-to-funguje-turbo-biturbo-twinscroll-turbo-a-kompresor.
• [4] Bechný, L. (1990). Foundry metallurgy and technology. ALFA Bratislava. (in Slovak).
• [5] Scholtes, B. (1990). Eigenspannungen in mechanisch randschichtverformten Werkstoffzu ständen, DGM Informationsgesellschaft mbH, Oberursel.
• [6] Skrzypczak, T., Wegrzyn-Skrzypczak, E., Winczek, J. (2016). Archives of Metallurgy and Materials. 61(3), 1243-1252.
• [7] Stefanescu, D.M., Alonso, G., Larranaga, P., Suález R. (2015). Acta Materialia. 103:103-114.
• [8] Alonso, G, Stefanescu, D.M., Larranaga, P., Suález. R. (2016). Castexpo and Metals Casting Congress. American Foundry Society.
• [9] Ferencey, V., Vala M., Bugár, M. (2013). Mechatronic systems for driving dynamics. http://www.e-mobilita.fei.stuba.sk/.

Uwagi

EN

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).