For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Committees
An Overview on Cast Iron Research at CMRDI
p.3
The Mechanism of Formation of Casting Skin in CG Iron and its Effect on Tensile Properties
p.11
Role of Lanthanum in Graphite Nucleation in Grey Cast Iron
p.19
Influence of Ti on Graphite Morphological Transition in Flake Graphite Cast Iron
p.25
Graphite Morphology Evolution during Melt Holding of Ductile Iron
p.31
Influence of Melting Conditions on Graphite Morphology in Spheroidal Graphite Cast Iron Using Ni-C Alloys
p.37
Oxygen State Forms in Cast Iron and their Effect on Graphite Crystallization
p.43
On the Theories of Graphite Formation in Iron
p.48

The Mechanism of Formation of Casting Skin in CG Iron and its Effect on Tensile Properties

Article Preview

Abstract:

Sand-cast compacted graphite (CG) cast iron typically presents a surface layer (the casting skin) whose microstructure is significantly different than that of the bulk material. It is generally believed that the casting skin is the result on interaction between the metal and the mold moisture and atmosphere. This reaction results in a decarburized or graphite-free layer. The thickness of this layer is a function of process variables (e.g. cooling rate, pouring temperature, binder, coating, sand fineness, and Mg and inoculation level). The paper presents a summary of recent findings on the negative effect of casting skin on the static properties of CG iron through the use of the skin quality factor for tensile strength, defined as the ratio between the as-cast and machined tensile strength. A mechanism of casting skin formation is proposed and supported with experimental and computational data.

You might also be interested in these eBooks
Science and Processing of Cast Iron IX View Preview

Info:

Periodical:

Key Engineering Materials (Volume 457)

Pages:

11-16

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.457.11

Citation:

Cite this paper

Online since:

December 2010

Authors:

Sarum Boonmee, Doru Michael Ştefănescu

Keywords:

Casting Skin, Compacted Graphite Iron (CGI), Mechanism of Formation, Tensile Properties

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2011 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] G.M. Goodrich and R.W. Lobenhofer, Trans. AFS, 110 (2002) pp.1003-1032.

Google Scholar

[2] F. Mampaey, P. Li and E. Wittink, Trans. AFS, 111 (2003) paper 03-056.

Google Scholar

[3] R.C. Aufderheide, R.E. Showman and M.A. Hysell, Trans. AFS, 113 (2005).

Google Scholar

[4] D.M. Stefanescu, S. Wills, J. Massone and F. Duncan, Int. J. of Metalcasting, (Fall 2008) 7-26.

Google Scholar

[5] S. Boonmee, D.M. Stefanescu, International J. of Metalcasting (Fall 2009) pp.19-24.

Google Scholar

[6] H.O. Reisener, The British Foundryman (September 1962) 362-369.

Google Scholar

[7] S. Boonmee, B. Gyesi, D.M. Stefanescu, Proc. 114th Metalcasting Congress, (2010) 10-067.

Google Scholar

[8] S. Boonmee and D.M. Stefanescu, Proc. 114th Metalcasting Congress, (2010) 10-068.

Google Scholar

[9] G. Kokos, Presentation at the 114th Metalcasting Congress, Orlando, FL (2010).

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.