EMD内燃机缸套铸造工艺优化  

Casting Process Optimization of Cylinder Liner of EMD Diesel Locomotive

作　　者：杨志刚 张忠腾 穆彦青 令振华 YANG Zhi-gang;ZHANG Zhong-teng;MU Yan-qing;LING Zhen-hua(CRRC Qishuyan Locomotive&Rolling Stock Technology Research Institute Co.,Ltd.,Changzhou213011,Jiangsu,China)

机构地区：[1]中车戚墅堰机车车辆工艺研究所有限公司,江苏常州213011

出　　处：《铸造》2022年第6期766-770,共5页Foundry

摘　　要：EMD缸套应用于EMD内燃机车,在发动机总成中与活塞和缸盖共同组成燃烧室,工况十分恶劣,其铸造品质的优劣直接影响着整机的大修周期与功率稳定。EMD缸套属于圆筒类复杂结构合金铸铁件,本文设计并改进了其铸造工艺,通过呋喃树脂砂和覆膜砂相结合的生产方案,采用多层浇道工艺、浇道补缩、陶瓷芯骨等措施,解决了磁粉超标、显微疏松、Φ8 mm通水孔偏芯等技术瓶颈。该工艺铸件合格率高,适合圆筒类复杂结构铸铁件的批量生产。EMD cylinder liner is used in EMD diesel locomotive.It forms a combustion chamber with piston and cylinder head in the engine assembly.The working condition is very bad.Its casting quality directly affects the overhaul cycle and power stability of the whole machine.EMD cylinder liner belongs to cylindrical alloy iron castings with complex structure.In this paper,the casting process was of the EMD cylinder liner designed and improved.Through innovative casting process,the technical problems such as unqualified magnetic particle flaw detection,micro porosity and 8 mm hole deviation were solved.The casting process had high yield,and was suitable for batch production of the cylindrical iron castings with complex structure.

关 键 词：内燃机缸套 铸造工艺 合金铸铁 

分 类 号：TG244[金属学及工艺—铸造]