Casting Quality Improvement by Gating System Optimization

• Autorzy: Bruna M. , Galčík M.

Identyfikatory

DOI

10.24425/afe.2021.136089

• Języki publikacji: EN

Abstrakty

EN

One of the main reason for decreased internal homogeneity of aluminium alloy castings is reoxidation. The resulting products of reoxidation are doubled oxides, so called "bifilms". Submitted paper deals with optimization of gating system design in order to reduce reoxidation processes taking place in mold cavity. Experimental work compares and evaluates three gating systems designs based on non-pressurized and naturally pressurized principles. Unconventional spin trap extension of runner was used in third design. Among the evaluated aspects were: mechanical properties, hot tearing index, visual inspection of average porosity amount, numerical simulation of velocity, turbulence and oxide amount. Paper aim is also to clarify the reoxidation phenomenon by visualization with the aid of ProCAST numerical simulation software. Results of mechanical properties and hot tear index clearly confirmed the positive effect of the naturally pressurized gating system with applied element for velocity reduction.

Słowa kluczowe

EN

reoxidation; gating system; numerical simulation; aluminium alloys; mechanical properties

PL

utlenianie; system bramkowania; symulacja numeryczna; stopy aluminium; właściwości mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2021
• Tom: Vol. 21, iss. 1
• Strony: 132--136
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Bruna M.

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

autor

Galčík M.

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

Bibliografia

• [1] Svoboda, J.M., Monroe, R.W., Bates, C.E. & Griffin, J. (1987). TAFS. 95, 187-202.
• [2] Campbell, J. (2006). Entrainment defects. Materials Science and Technology. 22(2), 127-145. ISSN 0267-0836. https://doi.org/10.1179/174328406X74248.
• [3] Campbell, J. (1993). Invisible Macrodefects in castings. Journal de Physique Archives. 03(C7), 861-872. https://doi.org/10.1051/jp4:19937135.
• [4] Dojka, R. Jezierski, J. & Campbell, J. (2018) Optimized gating system for steel castings. Journal of Materials Engineering and Performance. 10. DOI: 10.1007/s11665-018-3497-1.
• [5] Sladek, A., Patek, M. & Mician, M. (2017). Behavior of steel branch connections during fatigue loading. Archives of Metallurgy and Materials. 62 (3), 1597-1601.
• [6] Brůna, M., Bolibruchová, D. & Pastirčák, R. (2017). Archives of Foundry Engineering. 17, 23-26. https://doi.org/10.1515/afe-2017-0084.
• [7] Lin, S., Aliravci, C. & Pekguleryuz, N.I.O. (2007). Hot-tear susceptibility of aluminum wrought alloys and the effect of grain refining. Materials Science and Engineering. A Sci. 38A, 1056-1068. https://doi.org/10.1007/s11661-007-9132-7.
• [8] Campbell, J. (2006). An overview of the effects of bifilms on the structure and properties of cast alloys. Metallurgical and Materials Transaction B. 37, 857-863. https://doi.org/ 10.1007/BF0273500.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)