摘要
确定了聚氧化乙烯改性水玻璃粘结剂的基本组分,测试了有机酯自硬和CO2气硬型砂的常温粘结强度和高温残留强度。研究发现,在水玻璃中加入聚氧化乙烯树脂能改善水玻璃的老化现象,充分发挥其粘结效率;粘结剂加入量相同时,型砂强度是普通水玻璃砂的1.5倍,800～1000℃时,型砂残留强度≤0.5MPa。结果表明,聚氧化乙烯改性水玻璃粘结剂加入量低,型砂工艺性能良好,浇注后出砂容易,有利于旧砂进一步干法回用。
The fundamental ingredients of PEO modified sodium silicate binder are determined, and the bonding strength in room temperature and retained strength in high temperature of ester cured sand and CO2 hardening sand are tested. The research indicates that adding PEO to the sodium silicate can improve its aging status and spread out its bonding efficiency well. With the same binder amount, the sand strength is nearly 1.5 times that of general sodium silicate sand, and the retained strength from 800 ℃ to 1000 ℃ is less than 0.5 MPa. The results demonstrate that the PEO modified sodium silicate possesses lower binder amount, better technical performances of sand and easier cleaning after pouring, which is in favor of reclamation of the used sand.
出处
《铸造》
EI
CAS
CSCD
北大核心
2006年第8期839-841,共3页
Foundry
基金
上海市科研计划资助项目(045211061)。
关键词
改性水玻璃
聚氧化乙烯
粘结强度
残留强度
modified sodium silicate
poly ethylene oxide （PEO）
bonding strength
retained strength
