The technical requiremen ts of piston rings,production equipments,compo-sition control,nodularizing a nd inoculating treatments,test results of microstructures and properties were i ntroduced.

• 介绍球铁活塞环的技术要求、生产条件、成分控制、球化处理、孕育处理,以及金相组织和力学性能检查结果。