Influence of Quartz Sand Quality on Bending Strength and Thermal Deformation of Moulding Sands with Synthetic Binders
| Autor: | S. M. Dobosz, A. Grabarczyk, K. Major-Gabryś, J. Jakubski |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Self-hardening moulding sands
Materials science Hot distortion Synthetic resin Metallurgy Alkyd Thermal deformation Metals and Alloys Fraction (chemistry) Furfural Industrial and Manufacturing Engineering chemistry.chemical_compound Innovative foundry technologies and materials Quartz sand chemistry Flexural strength visual_art lcsh:TA401-492 visual_art.visual_art_medium lcsh:Materials of engineering and construction. Mechanics of materials Synthetic resins Composite material Quartz |
| Zdroj: | Archives of Foundry Engineering, Vol 15, Iss 2, Pp 9-12 (2015) |
| ISSN: | 2299-2944 |
| DOI: | 10.1515/afe-2015-0028 |
| Popis: | Modern techniques of castings production, including moulding sands production, require a strict technological regime and high quality materials. In the case of self-hardening moulding sands with synthetic binders those requirements apply mainly to sand, which adds to more than 98% of the whole moulding sand mixture. The factors that affect the quality of the moulding sands are both chemical (SiO2, Fe2O3 and carbonates content) and physical. Among these factors somewhat less attention is paid to the granulometric composition of the sands. As a part of this study, the effect of sand quality on bending strength Rgu and thermal deformation of self-hardening moulding sands with furfural and alkyd resin was assessed. Moulding sands with furfural resin are known [1] to be the most susceptible to the sand quality. A negative effect on its properties has, among others, high content of clay binder and so-called subgrains (fraction smaller than 0,1mm), which can lead to neutralization of acidic hardeners (in the case of moulding sands with furfuryl resin) and also increase the specific surface, what forces greater amount of binding agents. The research used 5 different quartz sands originating from different sources and characterized with different grain composition and different clay binder content. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|