汽室套是蒸汽机车上的主要磨损零件之一。原用普通中磷铸铁生产的汽室套,普遍存在寿命短,耐磨性差,偏磨、段磨严重的现象。段修时镗修量大,换套率高,在厂修时几乎需要全部更换新套。因此,提高汽室套的耐磨性,对改善机车的使用性能,减少段修、厂修的工作量和换套率,提高整个铁路运输的经济效益是很重要的。我厂自1980 The steam chamber cover is one of the main wear parts on the steam locomotive. The original ordinary phosphorus cast iron chamber sleeve, the prevalence of short life, poor wear resistance, partial wear, section wear serious phenomenon. Section repair boring repair volume, for a high rate of change, when the factory repair almost all need to replace the new set. Therefore, it is very important to improve the wear resistance of steam chamber sleeve in order to improve the serviceability of locomotive, reduce the work load and changeover rate of section repair, factory repair and improve the economic benefit of the whole railway transportation. I plant since 1980