球铁件醇基防渗硫涂料的研究

Study on Alcohol-base Sulfur Resistant Coating Used for Ductile Iron

针对呋喃树脂砂生产球墨铸铁件表面渗硫、产生片状等非球状组织的现象,选用镁橄榄石粉作为防渗硫剂,用助剂A和助剂B作为复合烧结助剂等组分配制球墨铸铁件用呋喃树脂砂醇基涂料。试验结果表明:研制的涂料具有优良的防渗硫效果,能够有效地避免或减轻非球状组织的产生。同时,浇注后该涂料层能从铸件表面自行剥离、脱落,防止了铸件的粘砂并减轻了清理量。

An alcohol-base sulfur resistant coating used for ductile iron was prepared by using forsterite powder as anti-sulfurizing agent, fluxing medium A, B as complex sintered agent according to the phenomenon of surface sulfurizing and lamellar structure of ductile iron castings produced by furan resin bonded sand. The results show that the coating has good anti-sulfurizing property, which can effectively prevent or reduce the generation of non-globular particles. After pouring, the coating layer of casting surface can strip voluntarliy, which can prevent the sticky sand casting and reduce the amount of cleanig-up.