{"title":"Selection of technological additives to the composition of the moulding mixtures based on water glass","authors":"N. A. Kidalov, A. S. Adamova, N. V. Grigoreva","doi":"10.1080/13640461.2021.2015889","DOIUrl":null,"url":null,"abstract":"ABSTRACT In the foundry for the production of moulds and cores, mixtures based on water glass are widely used. During their hardening, the coagulation of liquid glass occurs, as a result of which the mixture obtains high strength characteristic. A significant drawback of moulding mixtures based on water glass is low knockout due to increased sintering ability of water glass with moulding sand. To improve knockout, weak additives are introduced into the composition of moulding mixtures. This paper analyses the characteristics of organic weak additives for the composition of moulding mixtures based on water glass. It is shown that the main indicators which affecting to the knockout of mixtures are the amount of evolved gases and the forming carbon formation. With an increase in coefficient of thermal destruction, the knockout of the mixtures based on water glass mixture is reduced by increasing the amount of formed carbon.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Cast Metals Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/13640461.2021.2015889","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 1
Abstract
ABSTRACT In the foundry for the production of moulds and cores, mixtures based on water glass are widely used. During their hardening, the coagulation of liquid glass occurs, as a result of which the mixture obtains high strength characteristic. A significant drawback of moulding mixtures based on water glass is low knockout due to increased sintering ability of water glass with moulding sand. To improve knockout, weak additives are introduced into the composition of moulding mixtures. This paper analyses the characteristics of organic weak additives for the composition of moulding mixtures based on water glass. It is shown that the main indicators which affecting to the knockout of mixtures are the amount of evolved gases and the forming carbon formation. With an increase in coefficient of thermal destruction, the knockout of the mixtures based on water glass mixture is reduced by increasing the amount of formed carbon.
期刊介绍：
The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.
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