我厂自八○年以来开始研制钨钒钛合金铸铁并投入批量生产,活塞环内在质量有了很大的提高。经多次装机和快速磨损试验,积累了大量的工艺数据,证明其使用寿命可达20万公里(4千小时以上)。 一、钨钒钛铸铁活塞环的 化学成分和金相组织 钨钒钛合金铸铁单体活塞环的化学成分见表1。 钨钒钛铸铁金相组织中含有较多的分布均匀的点碎状石墨(实际上是细小的A型石墨)。由于呈碎状分布的钒钛碳化物容易得 Since 1980, our factory began to develop tungsten vanadium titanium alloy cast iron and put into mass production, the internal quality of piston ring has been greatly improved. After a number of installed and rapid wear test, accumulated a large number of process data to prove that its service life of up to 200,000 km (4,000 hours or more). First, the tungsten vanadium titanium cast iron piston ring chemical composition and microstructure Tungsten vanadium titanium alloy cast iron piston ring chemical composition shown in Table 1. Tungsten vanadium titanium cast iron metallographic structure contains more uniform point broken graphite (in fact, small A-type graphite). Due to the fragmented distribution of vanadium titanium carbide easy to get