球墨铸铁件防渗硫剥离型涂料的研究

Study of an Anti-sulfurizing and Stripping Coat Parts for Ductile Casting Iron

针对呋喃树脂砂生产球墨铸铁件表面渗流、产生片状等非球状组织的现象,本文选用镁砂粉作为反应型防渗硫剂,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流效果,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 and strip sintered coating used in furan resin bonded sand for ductile iron was prepared by using magnesia 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 experiment and application results show that this coating has good anti-sulfurizing property, which can effectively prevent or reduce the generation of non-globular particles. At the same time, after pouring, the coated layer of casting surface can be self-stripped, or be off, which will prevent the sticky sand from casting and reduce the amount of clean-up.