Livarski vestnik 60/2013 nr. 3
Horacek, M. – Kosour, V. – Zemcik, L. – Macku,M. – Stachovec,I.jr.
Brno University of Technology, Institute of Manufacturing Technology,
Michalcik, P. – Vastak, P. – Horensky, J. – Jedovnicky, J. – Mazurek, T.
Fimes,a.s. Foundry, Uherske Hradiste, Czech Republic
A. Megušar, M. Debeljak, P. Mrvar, A. Mahmutović,
LTH Ulitki d.o.o., Vincarje 2, Škofja Loka
University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and Metallurgy, Chair of Foundry Engineering, Aškerčeva 12, Ljubljana, Slovenia
TC livarstvo d.o.o. Teslova 30, 1000 Ljubljana www://tc-liv.eu
Srđan Marković, Mauro Cibaldi, Marko Stakić, Srećko Manasijević,Radomir Radisa
Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia, www.tmf.bg.ac.rs,
DERAL Spa-Via Moretto 80, 25025 Manerbio (BS), Italy, www.deral.it
cEling,A.D.Georgija Jaksica 14,L.Sor,15300Loznica,Serbia,
LOLA-Institute, Kneza Viseslava 70a, 11000 Belgrade, Serbia, www.li.rs
Horacek, M. – Kosour, V. – Zemcik, L. – Macku,M. – Stachovec,I.ml.
Brno University of Technology, Institute of Manufacturing Technology,
Michalcik, P. – Vastak, P. – Horensky, J. – Jedovnicky, J. – Mazurek, T.
Fimes,a.s. Foundry, Uherske Hradiste, Czech Republic
RESEARCH AND DEVELOPMENT OF TECHNOLOGY FOR LARGE – THIN WALL – HIGH QUALITY ALUMINIUM CASTINGS FOR AIRCRAFT INDUSTRY
ABSTRACT
Investment casting technology is one of the foundry technologies enabling to achieve both very narrow dimensional casting tolerances (so called “net shape technology”) and also very complex casting shapes. The whole concept of the three years research joint project of Fimes,a.s.- aluminium investment casting foundry in Uherske Hradiste and the Brno University of Technology, is focused to development of this technology. The main goal of this research is the implementation of the achieved results into daily Fimes foundry practice and thus to increase the foundry chances to address customers from aircraft, aerospace, defence and similar hi-tech industries .
The whole project and therefore also this paper is divided into 7 parts (Chapters 2.1 – 2.7)
following the main phases of investment casting technology:
1/ “Mother” die (i.e. mould for making wax patterns)
2/ Wax pattern
3/ Ceramic shell mould
4/ Preparation of aluminium melt
5/ Pouring technique
6/ Filling the ceramic mould cavity by molten metal
7/ Finishing operations and monitoring of the whole manufacturing process
In the first year of the project (2011) the actual situation at Fimes foundry in each phases of the technology has been analyzed (design of the dies, making wax patterns, pattern
assembly including gating systems, monitoring existing shelling process, preparation of the
aluminium melt, pouring techniques, etc.) and in each part of the process also direction of future research set up.
na vrh
A. Megušar, M. Debeljak, P. Mrvar, A. Mahmutović,
LTH Ulitki d.o.o., Vincarje 2, Škofja Loka
University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and Metallurgy, Chair of Foundry Engineering, Aškerčeva 12, Ljubljana, Slovenia
TC livarstvo d.o.o. Teslova 30, 1000 Ljubljana www://tc-liv.eu
APPLICATION OF JET-COOLING SYSTEM FOR LOCAL DIRECTIONAL SOLIDIFICATION OF ALUMINIUM-ALLOY CASTINGS
ABSTRACT
Aluminium-alloy castings must often assure functionality of supporting or sealing elements. Therefore pressure-die castings must have microstructure of high-quality. Design of product does not always assure the shape that is also the most suitable for the pressure-die casting process. Therefore porosity appears in castings. It cannot be always eliminated with standard methods. Local directional solidification that improves the quality of material in single parts of the casting can be the solution of this problem.
na vrh
Srđan Marković, Mauro Cibaldi, Marko Stakić, Srećko Manasijević,Radomir Radisa
Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia, www.tmf.bg.ac.rs,
DERAL Spa-Via Moretto 80, 25025 Manerbio (BS), Italy, www.deral.it
cEling,A.D.Georgija Jaksica 14,L.Sor,15300Loznica,Serbia,
LOLA-Institute, Kneza Viseslava 70a, 11000 Belgrade, Serbia, www.li.rs
EFFECT OF USE OF LOW-FREQUENCY ELECTROMAGNETIC FIELD ON THE PRODUCTION AND PROPERTIES OF DIRECT CHILL CAST 6060 ALUMINUM ALLOY
ABSTRACT
In this study, the effect of low frequency electromagnetic fields during the vertical semi-continuous casting process of 6060 aluminum alloy billets was investigated. The results were compared with those obtained by conventional semi-continuous casting. Based on comparative analysis of the results, it was found that casting in a low frequency electromagnetic field offers many advantages, such as smooth surface of the billets, smaller grain size in the cross section, finer microstructure and a uniform distribution of inter-metallic phases in the alloy, with the same or even slightly better mechanical properties. For these reasons, the employment of this casting process is considered an option for obtaining economic savings.
Keywords: low frequency electromagnetic casting process (LFEC), direct chill casting
process (DC), aluminum alloy, microstructure, mechanical properties
na vrh