Faculty Publications

Title

Use of dilatometry to evalute the high temperature characteristics of silica in chromite sand

Document Type

Conference

Keywords

Chromite, Double skin, Glazing, Penetration, Steel casting

Journal/Book/Conference Title

73rd World Foundry Congress "Creative Foundry", WFC 2018 - Proceedings

First Page

447

Last Page

448

Abstract

The steel casting industry incorporates chromite sand in their core rooms, mainly due to the desirable properties exhibited by the aggregate. Chromite sand provides a cheaper alternative to specialty aggregates such as Zircon, while reducing or eliminating casting defects associated with silica sand. However, chromite sand is associated with surface defects in heavy section steel castings, known as the double skin defect. One of the causes for this defect is the presence of impurities, such as silica or silicates, in the sand. The University of Northern Iowa Metal Casting Center conducted tests using dilatometry to analyze the high temperature characteristics of chromite at varying silica content. Additionally, sinter temperatures were calculated for the samples. The testing and results detailed may be useful to monitor chromite sand for their high temperature characteristics. The sinter temperature results can be compared with sand temperature curves from simulation software to evaluate casting applications for defects related to Chromite sand.

Original Publication Date

1-1-2018

Repository

UNI ScholarWorks, Rod Library, University of Northern Iowa

Language

en

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