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4 Archives of Foundry Engineering

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Influence analysis foamed polystyrene model on casting defects as well as microstructure ductile cast iron from Lost Foam process with Inmold method

100%

Just P. , Pacyniak T.

2011

tom Vol. 11, iss. 3

155-158

In this work was shown a influence analysis foamed polystyrene model on casting defects as well as microstructure ductile cast iron from Lost Foam process with Inmold method.

Control of cast iron and casts manufacturing by Inmold method

84%

Pietrowski S.

2009

tom Vol. 9, iss. 3

133-142

In this paper the usability of cast iron spheroidizing process in mould control by ATD method as well as by ultrasonic method were presented. Structure of instrumentation needed for control form performance of cast iron spheroidizing by Inmold method was illustrated. Author, pointed out that amount of magnesium master alloy should obtain 0,8 - 1,0% of mass in form at all. Such quantity of preliminary alloy assure of obtain of nodular graphite in cast iron. In consequence of this, is reduce the cast iron liquidus temperature and decrease of recalescence temperature of graphite-eutectic crystallization in compare with initial cast iron. Control of casts can be carried out by ultrasonic method. In plain cast iron, ferritic-pearlitic microstructure is obtaining. Additives of 1,5% Cu ensure pearlitic structure.

Influence of reaction chamber shape on cast-iron spheroidization process in-mold

84%

Pietrowski S.

tom Vol. 10, iss. 1

115-122

This paper presents a results concerning the influence of reaction chamber shape on cast - iron spheroidization process in form. The volume of the tested reaction chambers was about 118000mm3. Reaction chambers in the shape of: rectangular, cylinder and spherical cap were examined. It has been shown that the best graphite spheroidizing process was provided by spherical cap chamber shape. The reaction of cast – iron with magnesium in reaction chamber depends on the flow of cast - iron in the chamber. In rectangular and cylinder shape chambers proceed the impact of diphase stream on flat bottom wall. It causes the creation on its surface film, called: cast – iron "film", where single grains of magnesium master alloy exist. The largest part of master alloy is drifted by liquid cast – iron to the top and only there graphite spheroidization process proceed. In the spherical cap shape reaction chamber, as a result of rotation movement of liquid cast – iron throughout its volume, graphite spheroidization process proceed. Apart from the reaction chamber shape, applying of mixing chamber ensure full cast - iron spheroidization process.

Ductile cast iron obtaining by Inmold method with use of LOST FOAM process

84%

Pacyniak T. , Kaczorowski R.

tom Vol. 10, iss. 1

101-104

The possibility of manufacturing of ductile cast iron castings by Inmold method with use of LOST FOAM process was presented in this work. The spheroidization was carried out by magnesium master alloy in amounts of 1% casting mass. Nodulizer was located in the reactive chamber in the gating system made of foamed polystyrene. Pretests showed, that there are technical possibilities of manufacturing of casts from ductile cast iron in the LOST FOAM process with use of spheroidization in mould.