액상규산소다 기반 무기바인더를 사용한 알루미늄 주조용 중자의 내수성 연구

Abstract

The foundry industry and its supplies are faced with strengthened environmental regulations as well as increasing concerns in the area of worker safety. Many foundries used traditional organic resin binder are encountering problems with organic compound emissions ,smoke and odors. Inorganic binders based on silicate chemistry have many environmental advantages, but these binders often suffer from highly hygroscopic property. The binder is made from environmental friendly inorganic materials such as colloidal silica, ithium silicate, and potassium methyl siliconate. These were studied as functions of SiO2/Na2O molar ratio and binder composition in an effort to enhance the bending strength, achieve a more favorable water-resistance of binder and core, storage stability of core, and castability of aluminium alloy. The fracture strength and water resistances could be controlled by changing the molar ratio of SiO2 and Na2O. The characteristics of samples prepared using the new binder systems were measured by using various analytical techniques. The results indicate that can improve the storage stability of the core, as well as they can increase the dry strength of core from 1.23MPa to 3.11MPa.