针对大中型油压机活塞环的性能要求,分析了用蠕墨铸铁的可能性。用普通蠕铁、中硅(Si4.9％)蠕铁、锡(Sn0.1％)蠕铁和铬钼铜灰铸铁制造的三种不同直径的活塞环进行性能比较和生产实践验证表明,蠕铁活塞环不仅能全面满足油压机活塞环性能要求,而且生产工艺简便,质量稳定,成品率高,经济效益好。现已正式用于生产。 According to the performance requirements of large and medium-sized hydraulic machine piston rings, the possibility of using compacted graphite cast iron is analyzed. The performance comparison and production practice of three different diameter piston rings made of common vermicular iron, medium silicon (Si4.9%) vermicular iron, tin (Sn0.1%) vermicular iron and chromium molybdenum gray iron cast iron show that creep Iron piston ring can not only fully meet the hydraulic piston ring performance requirements, and the production process is simple, stable quality, high yield, good economic returns. Now officially used in production.