The Influence of the Mould Filling Conditions on the Quality of Castings Made of EN AC-44000 Alloy

• Autorzy: Nadolski M. , Konopka Z. , Łągiewka M. , Zyska A.

Identyfikatory

DOI

10.2478/afe-2014-0029

• Języki publikacji: EN

Abstrakty

EN

The work deals with the influence of change in the filling conditions of the ceramic moulds with plaster binder on the presence of gaseous porosity and the microstructure of the achieved test castings with graded wall thickness. Castings made of EN AC-44000 alloy, produced either by gravity casting, or by gravity casting with negative pressure generated around the mould (according to the Vacumetal technology), or by counter-gravity casting were compared. The results of examinations concerning the density of the produced castings indicate that no significant change in porosity was found. The increased size of silicon crystals was found for the increased wall thicknesses due to the slower cooling and solidification of castings.

Słowa kluczowe

EN

innovative foundry materials; innovative foundry technologies; plaster mould; counter-gravity casting; vacuum casting

PL

innowacyjne materiały odlewnicze; innowacyjne technologie odlewnicze; forma odlewnicza; odlewanie próżniowe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 2
• Strony: 19--22
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Nadolski M.

• Department of Foundry, Technical University of Częstochowa, ul. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Konopka Z.

• Department of Foundry, Technical University of Częstochowa, ul. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Łągiewka M.

• Department of Foundry, Technical University of Częstochowa, ul. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Zyska A.

• Department of Foundry, Technical University of Częstochowa, ul. Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

• [1] Dańko, J. (2000). Machines and devices for pressure casting. Theoretical foundations. Construction. Measurements and maintenance. Cracow: Ed. AGH.
• [2] Białobrzeski, A. (1992). Pressure casting. Machines, devices and technology. Warsaw: PWN.
• [3] Białobrzeski, A. & Martynowska, E. (1977). Pressure reducing systems in a pressure die. Przegląd Odlewnictwa (Foundry Review). 5, 112-115.
• [4] Białobrzeski, A. (1984). Machines, devices and technology of pressure casting. Cracow: Ed. Foundry Research Institute.
• [5] Piłkowski, Z. & Czyż, M. (1997). Examinations of moulding materials intended for Vacumetal process. Krzepnięcie Metali i Stopów (Solidification of Metals and Alloys). 31, 171-179.
• [6] Ochęduszko, S. (1981). Applied thermodynamics. Warsaw: WNT.
• [7] Wierzbicka, B. (1981). Solidification of casting alloys under external pressure. Krzepnięcie metali i stopów (Solidification of Metals and Alloys). IV, 35-46. Ossolineum.