They are most graphite cast iron and steel.The performance of piston ring can be improved by surface treatments such as plating chromium,nitriding,spraying molybdenum and spraying ceramics.

• 球墨铸铁和钢材已经成为活塞环的基本材料,采用表面处理方法如镀铬、氮化、喷钼、喷涂陶瓷层等工艺进行表面改性来提高活塞环的使用性能。