离心铸造铸铁排水管生产中的一些问题

针对离心铸造铸铁排水管生产过程中存在的问题，如设备选型、涂料的影响，麻坑、针孔等铸造缺陷的产生原因等进行了分析和探讨。只要铸造生产工艺合理、涂料性能合适，即使是简易型离心铸管机也可生产出无铸造缺陷的高质量铸管。涂料性能与涂料使用方法强烈影响铸管表面质量和管模使用寿命。铸管外表面麻坑、针孔等缺陷的主要影响因素是涂料本身的性能和涂料使用工艺，铸管内表面龟纹等铸造缺陷的主要影响因素是铁水质量。

Some Aspects of Cast Iron Drainpipe Drainpipe Rofuction in Cne-trfugal Casting

Some aspects in cast-iron drainpipe production in centrifugal casting, such as machine type, influence of coating, formation of pit and pin-hole defects, were analyzed and approached. The qualified cast-pipe free from pit, pin-hole, network vein and scum could be produced under proper casting process and pertinent coating perfomiance reganilless of fully automatic centrifugal or simplified cast-pipe machine. The coating performance and technology have a great effect on the surface quality of cast-pipe and the service life of pipe mold. The keyreason for the fomiation of network vein in inner surface of cast-pipe is liquid iron quality.