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Mould and core gas evolution in grey iron castings
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. (Gjuteriteknologi)
Swerea Swecast.
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. (Gjuteriteknologi)
2015 (English)In: International Foundry Research, ISSN 0046-5933, Vol. 67, no 4, 10-20 p.Article in journal (Refereed) Published
Abstract [en]

The volume and rate of gas evolution from cores prepared with various binders and sand has been determined with a new commercial technique. Spherical cores were mounted on a glass tube and immersed into molten grey iron. The gas generated by decomposition of the binder was determined by displacement of water in a measuring tube placed on a balance. The gas evolution from PUCB, epoxy and sodium silicate cores changes insignificantly during the first week after production. Neither influences iron temperature the amount of evolved gas to a large extent. Different binders evolve different amount of gas, but also the sand type affects the gas evolution. The impact of additives on the gas evolution is dependent on the amount of organic compounds in the additive. Coatings increase the total gas volume, while the maximal rate is not necessarily affected. Dried green sand evolves more gas than chemical bonded sand.

Place, publisher, year, edition, pages
2015. Vol. 67, no 4, 10-20 p.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-28953OAI: oai:DiVA.org:hj-28953DiVA: diva2:892600
Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2016-01-11Bibliographically approved

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