消失模铸造管件自生锈斑的成因分析及防止措施  

Cause Analysis and Prevention Measures of Self-generated Rust Spot of Expendable Casting Process Pipe

作　　者：李化芳[1] 李晓明 贾国芳 LI Huafang;LI Xiaoming;JIA Guofang(Hebei Institute of Machinery and Electricity,Xingtai 054000,China;Wuhu Xinxing Ductile Iron Pipes Co.Ltd.,Wuhu 241002,China)

机构地区：[1]河北机电职业技术学院,河北邢台054000 [2]芜湖新兴铸管有限责任公司,安徽芜湖241002

出　　处：《铸造技术》2018年第7期1454-1456,共3页Foundry Technology

摘　　要：通过对消失模铸造管件表面自生锈斑的特点和分布规律观察,分析了锈斑物质构成。结果表明,出现自生锈斑的主要原因是Si-Ba瞬时随流孕育剂没有充分溶解,控制孕育工艺可以有效避免自生锈斑的产生。Through the observation of the characteristics and distribution regularity of the self-generated rust spots on the surface of the expendable casting process（EPC） pipe,the composition of the rust spot was analyzed.The results show that the main reason of self-generated rust spots is that the instantaneous with the flow inoculant of Si-Ba is not fully dissolved,the self-generated rust spots can be effectively eliminated by controlling the inoculation process.

关 键 词：消失模 自生锈斑 复合孕育剂 

分 类 号：TG250.6[金属学及工艺—铸造]