硅钼球墨材质排气歧管缩松问题解决  

Silica molybdenum ductile ink material exhaust manifold shrinkage problem solved

作　　者：李锋 王慧丽 符晓 周兆伦 袁超林 李莹 LI Feng;WANG Huili;FU Xiao;ZHOU Zhaolun;YUAN Chaolin;LI Ying(Xixia Internal Combustion Engine Intake Pipe Co.,Ltd.,Xixia 474500,Henan,China)

机构地区：[1]西峡县内燃机进气管有限责任公司,河南西峡474500

出　　处：《金属加工（热加工）》2024年第12期107-109,共3页MW Metal Forming

摘　　要：通过对一种硅钼球墨铸铁排气歧管铸造工艺的诊断分析及改进,将铸件缩松废品从40%降低到2%,铸件的工艺出品率同时提高5%。描述了解决铸件缩松的过程,以案例事实证实了冒口尺寸、冒口位置、冒口颈参数及化学成分对铸件缩松缺陷有着十分重要的影响,正确设计铸件冒口参数是提高硅钼球墨铸铁排气歧管铸件致密性的重要一环,同时也是影响铸件工艺出品率的重要因素。Through the diagnosis analysis and improvement of the casting process of a silicon-molybdenum ductile iron exhaust manifold(the exhaust pipe),the waste of casting shrinkage and porosity was reduced from 40%to 2%,and the technological yield of casting was also increased by 5%.The author described the process of solving the shrinkage and porosity of casting.It is proved that riser size,riser position,riser neck parameters and chemical composition have a very important impact on shrinkage and porosity defects of castings.The correct design of riser parameters is an important link to improve the density of SIMO ductile iron exhaust pipe castings,and it is also an important factor affecting the casting process yield.

关 键 词：排气歧管 缩松 冒口 化学成分 

分 类 号：TG255[金属学及工艺—铸造] U466[机械工程—车辆工程]