1 概述 众所周知,作为内燃机心脏主要部件之一的活塞环,它的主要作用为密封燃烧室、控制机油、传热及支承活塞,它的性能好坏对内燃机效率的高低起着非常重要的作用。随着科学技术的发展,内燃机向高压高速方向发展,内燃机的发展对活塞环提出了越来越高的要求。灰铸铁曾是制造内燃机活塞环的主要材料,球墨铸铁与灰铸铁相比,具有强度高、强性好、韧性好以及 1 Overview As we all know, as the heart of the internal combustion engine, one of the main components of the piston ring, its main role is to seal the combustion chamber, control oil, heat transfer and support the piston, its performance is good or bad internal combustion engine efficiency plays a very important role. With the development of science and technology, the development of internal combustion engine to high pressure and high speed, the development of internal combustion engine piston rings put forward higher and higher requirements. Gray cast iron was the main material used to manufacture piston rings for internal combustion engines. Compared with gray cast iron, ductile iron has the advantages of high strength, good strength, good toughness and