中国铸造2009，Vol.6Issue(3)：191-196,6.
Properties of sodium silicate bonded sand hardened by microwave heating
Properties of sodium silicate bonded sand hardened by microwave heating
摘要
Abstract
The sodium silicate bonded sand hardened by microwave heating has many advantages,such as low sodium silicate adding quantity,fast hardening speed,high room temperature strength,good collapsibility and certain surface stability. However,it has big moisture absorbability in the air,which would lead to the compression strength and the surface stability of the sand molds being sharply reduced. In this study,the moisture absorbability of the sodium silicate bonded sand hardened by microwave heating in different humidity conditions and the effect factors were investigated. Meanwhile,the reasons for the big moisture absorbability of the sand were analyzed.Some measures to overcome the problems of high moisture absorbability,bad surface stability and sharply reducing strength in the air were discussed. The results of this study establish the foundation of green and clean foundry technology based on the microwave heating hardening sodium silicate sand process.关键词
microwave heating hardening/sodium silicate bonded sand/moisture absorbabilityKey words
microwave heating hardening/sodium silicate bonded sand/moisture absorbability分类
矿业与冶金引用本文复制引用
Wang Jina,Fan Zitian,Zan Xiaolei,Pan Di..Properties of sodium silicate bonded sand hardened by microwave heating[J].中国铸造,2009,6(3):191-196,6.基金项目
This work was financially supported by the National Nature Science Foundation of China under grant No. 50575085. （）
