喂线法批量生产蠕墨铸铁的控制要点

Control Points of Batch Production of Compacted Graphite Iron with Feeding Cored-wire Technology

蠕墨铸铁成为柴油机升级换代的材料首选,它具有球墨铸铁的强度,又具有灰铸铁类似的防振、导热能力及铸造性能。本文介绍采用喂线法批量稳定生产不同牌号、重量蠕墨铸铁气缸体、缸盖、曲轴箱的工艺控制要点,并根据生产流程图对影响蠕化率因素进行了逐一分析。铸造生产过程由粗放式改为精细化管理,辅以先进的热分析仪技术及实用的超声波技术,潍柴蠕墨铸铁铸件实现了批量稳定生产。

Compacted graphite iron（CGI）has the same strength with the nodular cast iron and similar vibration control,thermal capacity and casting performance with gray cast iron,having become the preferred material of diesel engine upgrade. In this paper,control points of batch production with feeding cored-wire technology of compacted graphite iron cylinder block,cylinder head and crankcase with different grades and weight were introduced,and the factors affecting vermicular graphite according to the flow chart of production were analyzed. Weichai vermicular cast iron realized stable batch production with the change from vulgar to fine management and supplemented by advanced thermal analyzer technology and practical ultrasonic technology.