Effect of Magnesium and Calcium as Spheroidizers on the Graphite Morphology in Ductile Cast Iron

Oluwole, Oluleke; Olorunniwo, O. E.; Ogundare, O.O.; Atanda, P. O.; Oridota, O.O

doi:10.4236/jmmce.2007.61003

Cited by 10 publications

(8 citation statements)

References 1 publication

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“…The effect of calcium and magnesium as spheroidizers on the graphite microstructure in cast iron was investigated in [6]. Samples of cast iron were heated in an induction furnace with a known composition charge as well as with specified ratios of calcium and magnesium as spheriodizers to the molten metal in the mold during casting process.…”

Section: Iron Productionmentioning

confidence: 99%

Spheroidal graphite iron production of furnace roof hangers

et al. 2021

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The wire rod mill of the Ajaokuta Steel Company Limited produces coils, wire rods and re-bars of different sizes. Without the furnace hangers, it will be difficult for the mill to continue to operate. This paper describes the production of furnace roof hangers that are required for re-heating furnace using the spheroidal graphite iron (SGI), highlighting the sand-casting process, charge calculation, and the chemical compositions. The facilities within the foundry shop of the steel company are used to produce furnace roof hangers. The available materials used for the casting of the hangers are the pig iron, scrap ends, foundry returns and magnesium. The process of production was performed through the reheating furnace for the heating of 120 m x 120 m x 120 m billets. One ton induction furnace of low frequency was used as the melting vessel. Also, 6 kg of magnesium was introduced in the ladle before the liquid metal was teemed into it. A Spectro analytical instrument was used to determine the chemical compositions of the materials before and after the casting processes. The analysis of the chemical compositions of produced sample of SGI are presented and discussed.

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Section: Iron Productionmentioning

confidence: 99%

Spheroidal graphite iron production of furnace roof hangers

et al. 2021

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“…This spheroid graphite occurs when there is Mg content in iron of 0.02% to 0.05%. However, because this element has a vapour point of only 1107 o C in addition to the solubility in the iron which is relatively low, so to prevent too much loss when mixing, Mg is given in the form of FeSiMg alloys [8] Thus, nodular cast iron is a class of cast iron in which carbon (graphite) remains free in the metal matrix, in a spheroid form, because of proper nodularization. This graphite format makes superior ductility, also providing good machinability, good surface finish and exceptional wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnesium on the Strength, Stiffness and Toughness of Nodular Cast Iron

Darmawan

Purboputro

Yulianto

et al. 2020

MSF

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Nodular cast iron is a type of cast iron with spheroid graphite surrounded by ferrite matrix and / or pearlite. The size of the graphite and its matrix affects the mechanical properties of the cast iron. This research was conducted to investigate the effect of Magnesium composition on strength, stiffness and toughness of nodular cast iron. Magnesium addition is performed by adding FeSiMg alloys. After that, the composition of magnesium was investigated by using spectrometry. Then tensile test was conducted to obtain the yield strength, tensile strength and modulus of elasticity. Further, impact test was performed to determine the impact energy needed to break the material. The result showed an increase of yield strength, tensile strength and stiffness and a decrease of toughness.

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“…Cast Iron offers the design engineer a family of casting alloys that gives a unique combination of low cost with the properties of castability, damping and availability. [1], [2] . Spheroidal iron is produced by adding small quantities of magnesium and cerium which produces graphite spheroids instead of flakes.…”

Section: Introductionmentioning

confidence: 99%

“…Ductile iron finds application as a substitute for steel, malleable iron and non-ferrous alloys because of excellent casting properties and machinability which improves production efficiency and reduces cost of production. [2] In this work, magnesium was added in the form of ferrosilicon magnesium in varying quantities and its effect on graphite morphology, nodularity and mechanical properties was studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnesium as Spherodizer on Graphite Morphology in Ductile Cast Iron

2016

IJAERD

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Cast Iron is an alloy of Fe-C-Si with carbon content greater than 2.11% and is used in the as-cast state or after treatment. Magnesium was added in varying quantities to cast iron and by studying the graphite morphology, nodularity and mechanical properties it was found that addition of 0.035% Mg to cast iron makes the mechanical properties of this cast iron comparable to graded heat treated material 65-45-12. Moreover due to increased nodulairty there could also be increase in machinability which needs to be investigated further.

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Effect of Magnesium and Calcium as Spheroidizers on the Graphite Morphology in Ductile Cast Iron

Cited by 10 publications

References 1 publication

Spheroidal graphite iron production of furnace roof hangers

Spheroidal graphite iron production of furnace roof hangers

Effect of Magnesium on the Strength, Stiffness and Toughness of Nodular Cast Iron

Effect of Magnesium as Spherodizer on Graphite Morphology in Ductile Cast Iron

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