铸钢斗齿粘砂缺陷的成因及对策  

Causes and Countermeasures Against Sticky Sand Defects in Tooth Steel Castings

作　　者：连炜[1] 袁东洲 车顺强 

机构地区：[1]西安工业大学,陕西西安710048 [2]国际铸业网,陕西西安710075

出　　处：《铸造技术》2013年第11期1591-1592,共2页Foundry Technology

摘　　要：为了防止砂型铸造低合金钢挖掘机斗齿铸件产生粘砂,要选用高品位硅砂(SiO2>96%),还要注重型砂的紧实度(≥85)和均匀度;在浇冒口系统设置时应避免使铸件和铸型产生局部过热。在必要情况下采用防粘砂涂料,均匀涂覆在粘砂严重的部位并适当增加涂料厚度。粘砂现象可得以改善,获得表面光洁的铸件。In order to prevent low alloy steel sand defects, the high-grade silica sand （SiO2〉 96%） was used combining sand compaction （1〉 85） and evenness, and avoiding local overheating in the casting and mold resulting from riser and pouring system. Where necessary, adopting anti-sticking coating to evenly coat on the site of serious sticky sand and appropriately increase in coating thickness can improve sticky sand phenomenon and obtain the castings with smooth surface.

关 键 词：铸钢斗齿 砂型铸造 粘砂 

分 类 号：TG245[金属学及工艺—铸造]