降低蠕墨铸铁气缸盖缩孔缺陷的改善措施  

Improvement Measures for Reducing Shrinkage Scrap Rate of Vermicular Cast Iron Cylinder Head

作　　者：刘治军[1] 杜文科[1] 胡世安[1] LIU Zhijun;DU Wenke;HU Shi'an(Guangxi Yuchai Machinnery Co.,Ltd.,Yulin 537005,Guangxi China)

机构地区：[1]广西玉柴机器股份有限公司,广西玉林537005

出　　处：《铸造工程》2022年第1期61-66,共6页Foundry Engineering

摘　　要：针对不同牌号的蠕墨铸铁气缸盖的缩孔问题,分别采用增加冷铁、压边冒口、减少砂芯发气量和优化砂芯排气、控制原材料来源等措施,降低了废品率;分析了蠕铁铸件缩孔产生的原因,认为当产生缩孔缺陷时,应从补缩和排气两方面来综合考虑。In view of the shrinkage problem of different grades of vermicular graphite cast iron cylinder heads,improvement measures such as increasing chills,blank-holder risers,reducing gas generation of sand core,optimizing sand core exhaust and controlling raw material sources were adopted to reduce the rejection rate.The causes of shrinkage of vermicular iron castings were analyzed,and it was considered that when shrinkage defects occur,both feeding and exhaust should be considered comprehensively.

关 键 词：蠕墨铸铁 气缸盖 缩孔 改善措施 

分 类 号：TG245[金属学及工艺—铸造]