EXPERIMENTAL ANALYSIS OF POROSITY IN GRAY IRON CASTINGS

W.O. Onche; Dr.C. Umezurike

EXPERIMENTAL ANALYSIS OF POROSITY IN GRAY IRON CASTINGS

W.O. Onche * §

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Dr.C. Umezurike

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University Of PortHarcourt, Rivers state

EXPERIMENTAL ANALYSIS OF POROSITY IN GRAY IRON CASTINGS

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Abstract

This paper presents the experimental analysis of porosity in gray iron castings poured with cores prepared with Phenolic urethane no-bake binders. The data for analysis were obtained by altering the casting parameters such as binder ratio, binder level, casting temperature, section size, mixing effect, metal composition, addition of Titanium, Zirconium, Iron oxide, core washes and core post-baking on porosity formation in gray iron castings. Results obtained showed that pouring temperature above 1482 o C, poor binder dispersion and use of binder ratio favouring higher level of polyisocyanate component of the binder promotes porosity. However the additions of 0.25% red iron oxide (Fe 2 O 3 ), 0.025% Titanium and 0.05% Zirconium were also effective in eliminating porosity just as core post-baking and the use of core coating modified with red iron oxide. This result will help metal casters to reduce porosity defects in gray iron castings when they are poured with cores prepared with Phenolic urethane no-bake binders.

References

6 Cites in Article

Reference Format

C Bates,R Monroe,J Wren (1980). Mold binder decomposition and its relation to gas defects in castings.
R Coble,M Flemings (1971). Removal of pores from casting by sintering.
John Dawson (1962). Report of Committee T, 1961-62.
Q Fang,D Granger (1989). Porosity formation in modified and unmodified A356 Alloy Castings.
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E Niyama,T Uchida,M Morikawa,S Saito (1982). A method of shrinkage prediction and its application to steel casting practice.

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

W.O. Onche, Dr.C. Umezurike. . "EXPERIMENTAL ANALYSIS OF POROSITY IN GRAY IRON CASTINGS". Global Journal of Research in Engineering GJRE Volume 10 (GJRE Volume 10 Issue 7).

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GJRE Volume 10 Issue 7

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

Keywords

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Classification

GJRE-E FOR Classification 091308

Submission ReceivedFebruary 5, 2010
Peer Review Double Blind
Handling Editor
Accepted March 2, 2010
Published March 15, 2010

Version of record

v1.2

Issue date

December 10, 2010

Language

English

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Article Matrices

Total Score: 107

Country: Nigeria

Subject: Global Journal of Research in Engineering

Authors: Dr.C. Umezurike, W.O. Onche (PhD/Dr. count: 1)

View Count (all-time): 153

Total Views (Real + Logic): 6355

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Publish Date: 2010 03, Mon

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