Improvements in Sand Mold/Core Technology: Effects on Casting Finish

Lannutti, Prof. John J. ; Mobley, Prof. Carroll E.

The Ohio State University (United States)

关键词: Density Gradients;    Casting;    Metal Casting;    Binders;    36 Materials Science;   

DOI  :  10.2172/841468
RP-ID  :  NONE
RP-ID  :  FC36-01ID13984
RP-ID  :  841468

美国|英语

来源: UNT Digital Library

【 摘 要 】

In this study, the development and impact of density gradients on metal castings were investigated using sand molds/cores from both industry and from in-house production. In spite of the size of the castings market, almost no quantitative information about density variation within the molds/cores themselves is available. In particular, a predictive understanding of how structure and binder content/chemistry/mixing contribute to the final surface finish of these products does not exist. In this program we attempted to bridge this gap by working directly with domestic companies in examining the issues of surface finish and thermal reclamation costs resulting from the use of sand molds/cores. We show that these can be substantially reduced by the development of an in-depth understanding of density variations that correlate to surface finish. Our experimental tools and our experience with them made us uniquely qualified to achieve technical progress.