本文介绍了呋喃树脂自硬砂用水基涂料.它是一种以石墨粉、锆英粉、镁橄榄石粉为耐火骨料,酚醛树脂为粘结剂,膨润土为悬浮剂和水构成的混合料.其配制过程是将混合料加入搅拌机,高速搅拌20~30分钟,然后在胶体磨中研磨8~10分钟.经一些工厂的试验证明,这种涂料可以提高大型铸铁件如机床、船用柴油机缸体等的质量,其表面粗糙度达到GB R_a=6.3~12.5μm. This paper introduces the water-based coating of furan resin self-hardening sand, which is a mixture of graphite powder, zircon powder and forsterite powder as refractory aggregate, phenolic resin as binder and bentonite as suspending agent and water. The preparation process is that the mixture is added to a mixer, stirred for 20-30 minutes at high speed, and then ground in a colloid mill for 8-10 minutes. The test of some factories proves that the coating can improve large cast iron parts such as a machine tool, a marine diesel engine block The quality of its surface roughness reaches GB R_a = 6.3 ~ 12.5μm.