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1
Content available Intermetallic Phases in Alloyed Cast Iron with 18%Si Addition
Stawarz M.
Archives of Foundry Engineering
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2020
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Vol. 20, iss. 2
37--42
EN
The paper presents an analysis of a selected grade of high silicon cast iron intended for work in corrosive and abrasive conditions. The text describes its microstructure taking into account the process of crystallization, TDA analysis, EDS, XRD and the chemical composition analysis. In order to determine the phase composition, X-ray diffraction tests were carried out. The tests were executed on a Panalytical X'Pert PRO X-ray diffractometer with filtration of radiation from a lamp with copper anode and PIXcel 3D detector on the deflected beam axis. Completed tests allowed to describe the microstructure with detailed consideration of intermetallic phases present in the alloy. Results of the analysis of the examined alloy clearly show that we deal with intermetallic phases of Fe3Si, Fe5Si3 types, as well as silicon ferrite and crystals of silicon. In the examined alloy, we observed the phenomenon of segregation of carbon, which, as a result of this process, enriches the surface of silicon crystals, not creating a compound with it. Moreover, the paper demonstrates capability for crystallization of spheroidal graphite in the examined alloy despite lack of elements that contribute to balling in the charge materials.
2
Content available The Reliability of the Results of the Modified Low-cycle Fatigue Test for Cast Iron Evaluated by Metallographic Studies
Maj M., Pietrzak K.
Archives of Foundry Engineering
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2015
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Vol. 15, iss. 1
41--46
EN
This study discloses the characteristic features of the modified low-cycle fatigue test used for the determination of the mechanical properties of two types of cast iron, i.e. EN-GJL-250 and EN-GJS-600-3. For selected materials, metallographic studies were also conducted in the range of light microscopy and scanning microscopy.
3
Content available Observation of spheroidal graphite in ductile cast iron by TEM
Hara T., Maekawa T, Terayama K, Kawabata T., Ikeno S., Matsuda K.
Archives of Metallurgy and Materials
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2013
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Vol. 58, iss. 2
431--432
EN
The microstructure of spheroidal graphites in ductile cast iron (FCD450) was investigated by TEM using cross sectional TEM samples prepared by FIB method. The spheroidal graphite consisted of many small areas, and all of these areas were indexed as the graphite structure and just carbon peak was detected from there.
PL
Mikrostruktura sferoidalnych wydzieleń grafitu w żeliwie sferoidalnym (FCD450) badana była przy użyciu transmisyjnej mikroskopii elektronowej i cienkich folii przygotowanych technika FIB. Grafit sferoidalny składał się z wielu małych obszarów i stwierdzono, że wszystkie te obszary mają strukturę grafitu i wykryto tylko pik od wegla.
4
Content available Segregation of Admixing Elements in the Boundary Layer of the Main Inlet of a Ductile Iron Casting
Borowiecki B., Mak S.
Archives of Foundry Engineering
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2013
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Vol. 13, iss. 2 spec.
10--17
EN
The object of the present paper is to determine the distribution of admixing elements, such as magnesium, manganese, silicon and sulfur, in the boundary layer of the main inlet of a ductile iron casting. The authors also intend to demonstrate the influence of elements diffusing from the casting mold, such as oxygen and silica, on the chemical composition of the boundary layer of the casting.
5
Content available A Comparison of Selected Methods of Graphitizing Inoculation Applied after the Spheroidizing Treatment
Gunia P., Soiński M.
Archives of Foundry Engineering
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2012
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Vol. 12, iss. 2s
95--99
EN
The work compares the effectiveness of selected methods of graphitizing inoculation applied after the spheroidization in the slender tundish ladle of 1 Mg capacity. The inoculation was carried out according to the three various options. The first one was performed simply by means of the block of inoculant inserted in the gating system of the mould, the second one started with initial inoculation by the in-stream method during the transfer of metal from the slender ladle to the pouring ladle and was completed with the secondary modification by means of the inoculant insert placed in the mould, the third one consisted in similar initial inoculation by the in-stream method during the transfer of metal from the slender ladle to the pouring ladle followed by the secondary inoculation, again by the in-stream method, applied during the pouring operation. Examination of cast iron structure allowed to find that the best results of inoculation are achieved in the case of inoculation carried out according to the Option III, though in all cases it was possible to produce cast iron of EN-GJS-400-15 grade meeting the demands of the Standard.
6
Content available remote Influence of molding sand on the number of grains graphite and on the rate of thin ferrite in pieces in a nodular iron ferritic matrix
Khatemi B.
Archives of Foundry Engineering
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2010
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Vol. 10, iss. 3 spec.
303--309
EN
The nodular cast irons are characterized by high mechanical properties compared to cast iron with lamellar graphite or vermicular graphite. The ductile iron has already been the subject of many studies especially since the literature is rich on them, and sources of information are different. The fact is that the mechanical properties of nodular cast iron (FGS) depend on the number of graphite grains, their roundness, the solidification rate and nature of the matrix [3]. Many studies of nodular cast irons showed that the more spherical particles of graphite, the higher the mechanical properties are high. In gray cast irons, the graphite spheroids have anticracking and give the ductile iron ductility. Note in this connection that the higher the number of graphite grains, the higher the ductile iron has better mechanical properties. In cast iron, the nature of the matrix is depending on several parameters including the cooling rate of molten metal, the thickness, shape and dimensions of parts. The faster cooling is slow over rate of ferrite is important [3, 4]. In this paper, we tested three types of sand casting: sand –based sodium silicate, furan resin and green sand on samples spherical graphite cast iron of different thickness. The objective in this article is to determine the number of grains of graphite and ferrite for each type of sand casting under the same experimental conditions including the cooling rate and chemical composition of the liquid metal.
7
Content available remote Analysis of quality and cost of FeSiMg treatment master alloy vs. cored wire in production of ductile cast iron
Guzik E.
Archives of Foundry Engineering
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2008
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Vol. 8, iss. 2
45-48
EN
The results of studies on the use of FeSi5%Mg magnesium alloy in modern cored wire injection method for production of nodular and vermicular graphite cast irons were described. The injection of Mg cored wire length is a treatment method which can be used to process The injection of Mg cored wire length is a treatment method which can be used to process iron melted in an electric induction furnace. This paper describes the results of using a high-magnesium ferrosilicon alloy in cored wire (Mg recovery 47-70%) for the production of vermicular and nodular graphite cast irons at in at least 13 foundries. The results of calculations and experiments have indicated the length of the cored wire to be injected basing on the initial sulfur content and weight of the treated melt. The results of numerous trials have shown that the magnesium cored wire process can produce high quality nodular and vermicular graphite irons under the specific industrial conditions of the above mentioned foundries. It has also been proved that in the manufacture of nodular graphite iron, the cost of the nodulariser in the form of elastic cored wire is lower than the cost of the FeSiMg5 master alloys.
8
Content available remote Quality and cost assessment of treatment with SiMg and NiCuMg master alloys vs cored wire in production of ductile iron
Guzik E.
Archives of Foundry Engineering
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2007
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Vol. 7, iss. 3
57-60
EN
The results of studies on the use of magnesium alloy in modern cored wire injection method for production of nodular and vermicular graphite cast irons were described. The injection of Mg cored wire length is a treatment method which can be used to process high sulphur cupola iron held in ladles or iron melted in an electric induction furnace. This paper describes the results of using a high-magnesium ferrosilicon alloy in cored wire (Mg recovery 47-70% ) for the production of vermicular and nodular graphite cast irons at Ścinawka Foundry, and for the production of nodular graphite iron at the following foundries: GZUT, KRAKODLEW, Centrozap - DEFKA, EE Zawiercie, WSK-Rzeszów, FWM PRZYSUCHA, HSW Stalowa Wola and PIOMA. The results of calculations and experiments have indicated the length of the cored wire to be injected basing on the initial sulfur content and weight of the treated melt. The results of numerous trials have shown that the magnesium cored wire process can produce high quality nodular and vermicular graphite irons under the specific industrial conditions of the above mentioned foundries. It has also been proved that in the manufacture of nodular graphite iron, the cost of the nodulariser in the form of elastic cored wire is lower than the cost of the FeSiMg or NiCuMg master alloys.
9
Content available remote Określenie własności mechanicznych żeliwa sferoidalnego metodą ATD
Stawarz M., Szajnar J.
Archiwum Odlewnictwa
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2005
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R. 5, nr 15
361--370
PL
W artykule przedstawiono sposób oceny jakości żeliwa sferoidalnego gatunku ZsCu1.0 w oparciu o metodę ATD. Przedstawiono krzywe ATD, dla których wyznaczono punkty charakterystyczne i w oparciu o nie dokonano oceny jakości żeliwa.
EN
The paper presented equation of regression for evaluation of quality of ductile cast iron of sort ZsCu1.0. They were prepared with the use of characteristic points of TDA curves.
10
Content available remote Kompleksowa ocena jakości żeliwa sferoidalnego
Stawarz M.
Eksploatacja i Niezawodność
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2004
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nr 2
55-58
PL
W pracy przedstawiono ocenę jakości żeliwa sferoidalnego w oparciu o przeprowadzone badania kompleksowe dwóch gatunków żeliw. Przedstawiono równania regresji do oceny jakości żeliwa sferoidalnego gatunku ZsCul. Opracowano je na podstawie charakterystycznych punktów krzywych ATD. Do opisu kształtu wydzieleń grafitu zastosowano współczynnik kształtu C.
EN
The paper presented equations of regression for evaluation of graphite shape in nodular cast iron. They were prepared with the use of characteristic points of TDA curves. The factor shape C was used to describe the nodular cast iron.
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