Identification and evaluation of modification level for compacted graphite cast iron

Sun, Xiaojuan; Li, Y.X.; Chen, X.

doi:10.1016/j.jmatprotec.2007.08.074

Cited by 15 publications

(13 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…One should also pay attention to the possibility of accumulation of sulfur obtained in the process of mechanical reclamation of molding sand with resins hardened with a catalyst containing sulfur, which leads to an increase in the thickness of the degraded graphite layer [31,[33][34][35]. Therefore, one should avoid using 100 % reclaimed sand.…”

Section: The Reaction Of Magnesium With Sulfur In the Moldmentioning

confidence: 99%

“…The processes taking place at the mold/metal interface can also lead to changes in the concentration of certain elements in the surface layer of the casting, and even deeper (to a few millimeters) [11,[35][36][37][38][39][40]. The metalographic examination of a number of fractures indicates that the source of certain casting surface problems may be the accumulation of undesirable elements at the casting surface.…”

Section: Move Of the Elements From Molding Sand To Casting And From Cmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings

Holtzer

Górny

Dańko

2015

SpringerBriefs in Materials

View full text Add to dashboard Cite

Section: The Reaction Of Magnesium With Sulfur In the Moldmentioning

confidence: 99%

Section: Move Of the Elements From Molding Sand To Casting And From Cmentioning

confidence: 99%

Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings

Holtzer

Górny

Dańko

2015

SpringerBriefs in Materials

View full text Add to dashboard Cite

“…Therefore, all types of factors influencing melt quality, such as chemical composition and trace elements, inclusions, inoculation and spheroidisation/vermicularization treatments and sampling temperature, will influence the solidification process of the melts and further the shape of its cooling curve [35]. According to the results of the research conducted by Jinhai et al and Backerud [20,34], the undercooling that initializes crystallization of austenite-compacted graphite eutectic is of the same order as in the case of ductile cast iron (curve 2 and 3 in Fig.…”

Section: Solidification Pathmentioning

confidence: 99%

General Characteristic of the Ductile and Compacted Graphite Cast Iron

Górny

2015

Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings

View full text Add to dashboard Cite

This section provides basic information about the spheroidal graphite cast iron (SGI) and compacted graphite cast iron (CGI) which belong to the group of high-quality cast iron. The classification of SGI and CGI according to ISO standards, their characteristics and the use of modern types such as ADI or Si-Mo were provided. The solidification path was shown, pointing to the important role of surface active elements in shaping the form of graphite. Models presenting eutectic grain growth in SGI and CGI were also described. It was also shown that in this connection, the main surface active elements (O and S) cause changes in the growth direction, and additionally, the so-called anti-spheroidizers, such as Ti, Bi, Zr, P and N, characterized by strong normal segregation, lower the liquidus temperature of the melt, thus creating the liquid channels that characterize CGI, which then stimulate the formation of compacted graphite. The issues of the number of eutectic grains, the cooling rate and the occurrence of defects in castings were raised. Finally the spheroidizing/compacting treatments have been shown along with the general scheme of the SGI/CGI preparation process.Spheroidal graphite cast iron (SGI) and compacted graphite cast iron (CGI) belong to the group of high-quality cast iron, the production of which is continually increasing. The general classification of cast iron is shown in Fig. 6.1.Currently, SGI and CGI, belongs to a group of the most important engineering materials, in view of its:• high mechanical properties, • significant savings in cost and weight (compared to equivalent steel and aluminum alloys), • excellent combination of good castability and machinability, • less sensitive to the cooling rate compared to cast iron (FGI), • provides the starting material for the production of "high tech" austempered ductile iron (ADI) and austempered vermicular cast iron (AVCI),

show abstract

“…According to ASTM A842-85 standard requirement specifications for CGI castings state that the percentage of nodular graphite is 20% maximum and the formation of flake graphite must be avoided in the main parts of a casting [3,4]. In microstructure, 80% minimum of all graphite is needed to be in the form of compacted (vermicular) according to ASTM A247 (type IV) [5].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Austenitic Compacted Cast Iron with Additive Manganese

et al. 2016

View full text Add to dashboard Cite

Abstract. High composition of austenitic matrix in microstructure is contributed to its special characteristic in reducing cracking and distortion. This special alloy will be in austenitic matrix when high temperature and also at room temperature which make it successful avoid matrix volume changes. In this study, austenitic compacted iron with minimum nickel contain of 12wt% is produced by using in-mould magnesium treatment. Magnesium Ferro Silicon (MgFeSi) used in determining the graphite form. Some of nickel replace by manganese in range of 9wt% to 12wt% Mn while Nickel remain at 12wt% Ni at all parameter. This research focuses on to investigate the effect of alloying elements on microstructure and mechanical properties. The outcome compared to standard of unmodified austenitic cast iron as in ASTM standard. The matrix obtained was all in austenitic matrix with the presence of compacted graphite distribution throughout the matrix. It is appeared that result shows increment of manganese at the centre region between graphite in the microstructure. It is occurred when percentage of manganese addition was increased. There are increases in hardness compared to unmodified austenitic iron. Tensile strength decreases when the manganese content increases in alloy.

show abstract

Identification and evaluation of modification level for compacted graphite cast iron

Cited by 15 publications

References 9 publications

Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings

Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings

General Characteristic of the Ductile and Compacted Graphite Cast Iron

Microstructure and Mechanical Properties of Austenitic Compacted Cast Iron with Additive Manganese

Contact Info

Product

Resources

About