A Study on the High Temperature Properties of Self-hardening Sand Mold (High Temperature Properties of Self-Hardening Sand Mold using Calcium-Orthosilicate Powder) [I]

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J. Korean Ceram. Soc. > Volume 13(1); 1976 > Article

Journal of the Korean Ceramic Society 1976;13(1): 20.

자경성 주형의 고온성질에 관한 연구 Calcium-Orthosilicate를 이용한 자경성 주형의 고온성질에 관하여 [I]

강인찬, 한윤희, 문인탁

인하대학교 공과대학

A Study on the High Temperature Properties of Self-hardening Sand Mold (High Temperature Properties of Self-Hardening Sand Mold using Calcium-Orthosilicate Powder) [I]

ABSTRACT

These are many kinds of self-hardening methods for sand mold using sodium silicate. When sodium silicate solution is mixed with calcium-orthosilicate powder hardening reaction occurs, which is based for self-hardening method at high temperature. The high temperature strength and resicual strength of mold are related to the mole ratio of sodium silicate and the contents of calcium-orthosilicate powder. The results obtained in this study were as follows: 1) The high temperature strength of mold was maximum at about $600^{circ}C$, and at higher temperature showed lower value on the contrary. 2) The high temperature strength of mold was increased by increasing the amount of sodium silicate having lower mole ratio and high concentration. 3) The residual strength of mold was reduced by increasing the mole ratio of sodium silicate and increasing the concentration of calcium-orthosilicate.