高温焙烧表面净化对型砂强度的影响  

Effect of Surface Purification by High Temperature Calcination on Strength of Molding Sand

作　　者：赵忠魁[1] 孙清洲[1] 张普庆[1] 荆海鸥[1] 马海龙[1] 

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101

出　　处：《铸造》2008年第11期1208-1210,共3页Foundry

基　　金：山东省自然科学基金资助项目(Y2006F28)

摘　　要：测量了焙烧前后硅砂的耗酸值,采用透射电子显微镜对其表面进行了观察,并与呋喃树脂混合,测量型砂强度的变化。结果表明,高温焙烧可以净化硅砂的表面,使硅砂的耗酸值降低。与新砂相比,焙烧砂与呋喃树脂混合后,砂粒间的粘结强度增高。Acid consumption of the raw and calcinated silica sand was determined, surface of the sands was observed by TEM, and tensile strength of the molding sands mixed with furan resin were measured. Results show that the surface of silica sands can be purified and quantities of the acid consumption can be reduced by high temperature calcination. Contrasting with raw sands, the bonding strength among calcined sand grains mixed with furan resin is higher.

关 键 词：硅砂 高温焙烧 表面净化 型砂强度 

分 类 号：TG221.1[金属学及工艺—铸造] TB303[一般工业技术—材料科学与工程]