炭子砂是一种用焦炭子、石墨粉和普通型砂混合配制的特种干模型砂。它的成分以石墨为主。它具有化学稳定性高、热膨胀性小、导热性强、出砂性好的特点。因此,它不但能满足铸型的一般性能要求,有效地防止夹砂和粘砂,还能起激冷作用,细化铸件的金相组织。几年来,我厂在多种铸件上使用炭子砂,代替了冷铁,取得了好的效果。 Carbon sand is a kind of special dry mold sand mixed with coke, graphite powder and ordinary sand. Its composition is mainly graphite. It has high chemical stability, thermal expansion, thermal conductivity, good sand characteristics. Therefore, it can not only meet the general performance requirements of the mold, effectively prevent sand and sand sticking, but also play a role in quenching, refine the microstructure of castings. Over the past few years, I plant a variety of castings on the use of carbon sand, instead of chilled iron, and achieved good results.