摘要
采用含有羰基、羧基的1#改性树脂,含有苯环、羟基、醛基的2#改性树脂,含有酰胺基的3#改性树脂作为细化CO2硬化水玻璃凝胶胶粒的改性剂的主干材料,对水玻璃进行改性处理。实验结果表明:1#改性树脂改性水玻璃与普通水玻璃相比,提高了常温下的粘结强度;改善了高温强度;消除了800℃时型砂的残留强度峰值。浇注实践证实,改性水玻璃能在实际生产中成功地应用,并具有溃散性好,浇出的铸件质量好等优点。
The CO2 hardening sodium silicate was modified using 1^# modified resin containing carbonyl and carboxyl, 2^# modified resin containing benzene, hydroxyl and formylphenyl, 3^# modified amide resin as modifier for refining gel particles. The results show that the bonding strength of 1^# modified sodium silicate at room temeprature increases, the strenth at elevated temperature improves and the residual strength peak of molding sand at 800℃ is eleminated compared with those of ordinary sodium silicate. The manufacturing practices show that modified sodium silicate has better collapsibility and can obatin the casting with good quality.
出处
《铸造技术》
CAS
北大核心
2008年第4期454-457,共4页
Foundry Technology
关键词
CO2硬化
水玻璃
改性
应用
CO2 hardening
Sodium silicate
Modification
Application
