摘要
在水玻璃中添加促硬剂Na_2SiF_6,型芯用较低的CO_2吹气量吹气硬化,这是一种自硬和吹气相结合的硬化方法,实验室及浇注试验证明,这种方法型芯启模快,水玻璃降至4％,不烘干,残留水分低,初期及24小时终强度较高,而且具有良好的溃散性能,型砂成本低。
A combimation of self～hardening and low Co_2 flow hardening technique for core make has been developed by addition of Silicofluoride hardener. Results of pouring experiment indicated that the new process reduced the sodium silicate to 4% with low water content and relatively higher initial and final(after 24 hours) strength. It is also demonstrated that the new process achieves shorter curing time without baking and good collapsibillity and low cost of core sand.
出处
《铸造技术》
CAS
北大核心
1990年第5期16-19,共4页
Foundry Technology
